A website dedicated to C# and being the best at it. http://www.thebestcsharpprogrammerintheworld.com/ Feb 13, 2011 Fri, 21 Jan 2011 21:45:00 +0000 © 2010-2011, All Rights Reserved When I convert one object to another using the keyword “as” and the original value is not of that type, the converted value simply becomes NULL. For example, if theItem is of type MessageBox, then row will be http://www.thebestcsharpprogrammerintheworld.com/blogs/Using-the-as-keyword-versus-boxing.aspx http://www.thebestcsharpprogrammerintheworld.com/blogs/Using-the-as-keyword-versus-boxing.aspx Sun, 07 Oct 2012 00:00:02 +0000 C# This is unfortunately more of a hack than a solution, but I thought I would share it any way. I had the situation where I needed to validate the entered time into a masked textbox. The masked textbox is a Windows Form control, but I hosted it within a WPF window using the WIndowsFormsHost element. Lastly, for some reason I could not get the Leave event to fire, so I http://www.thebestcsharpprogrammerintheworld.com/blogs/Validating-time-using-a-masked-textbox-within-a-WPF-window.aspx http://www.thebestcsharpprogrammerintheworld.com/blogs/Validating-time-using-a-masked-textbox-within-a-WPF-window.aspx Sun, 07 Oct 2012 00:00:01 +0000 C# Firstly, let me say that there is nothing special about this upgrade. The instructions which I wrote here will still work with an 11g database. The issue I had was more with, what is the difference between a SID and a SERVICE_NAME which is used to http://www.thebestcsharpprogrammerintheworld.com/blogs/Upgrade-from-Oracle-10g-to-Oracle-11g-with-ODP-Net-and-NHibernate-ORA-12514.aspx http://www.thebestcsharpprogrammerintheworld.com/blogs/Upgrade-from-Oracle-10g-to-Oracle-11g-with-ODP-Net-and-NHibernate-ORA-12514.aspx Wed, 12 Sep 2012 00:00:02 +0000 NHibernate The equivalent to LIKE via the LINQ to NHibernate provider is Contains. An example of a LINQ to NHibernate that will return a result set matching a search like parameter is http://www.thebestcsharpprogrammerintheworld.com/blogs/Using-LIKE-with-LINQ-to-NHibernate.aspx http://www.thebestcsharpprogrammerintheworld.com/blogs/Using-LIKE-with-LINQ-to-NHibernate.aspx Wed, 12 Sep 2012 00:00:01 +0000 NHibernate I tend to overcomplicate things, I think that I do it subconsciously in an attempt to make sure I give due diligence in the search for the best solution. I had a parent child relationship mapped out using NHibernate. Something like the below where there is a one-to-many bag in the http://www.thebestcsharpprogrammerintheworld.com/blogs/Updating-Child-records-with-NHibernate-using-HQL-IQuery.aspx http://www.thebestcsharpprogrammerintheworld.com/blogs/Updating-Child-records-with-NHibernate-using-HQL-IQuery.aspx Wed, 4 Aug 2012 00:00:01 +0000 NHibernate Before you begin loading and populating collections, you should decide which collection to use based on the requirements. Some collections are built for speed when selecting, some are http://www.thebestcsharpprogrammerintheworld.com/blogs/Searching-a-generic-List-collection.aspx http://www.thebestcsharpprogrammerintheworld.com/blogs/Searching-a-generic-List-collection.aspx Tue, 3 Ju1 2012 00:00:03 +0000 C# While trying to insert parent child composite key linked into a database I received this... When I added the insert="false" attribute to the 8th property in my mapping file, the issue was resolved. Start with the ID at 0 and then http://www.thebestcsharpprogrammerintheworld.com/blogs/Invalid-Index-N-For-This-SqlParameterCollection-using-NHibernate.aspx http://www.thebestcsharpprogrammerintheworld.com/blogs/Invalid-Index-N-For-This-SqlParameterCollection-using-NHibernate.aspx Tue, 3 Ju1 2012 00:00:02 +0000 NHibernate One of the errors I received when I was trying to get the parent child insert to work with NHibernate. My initial action was to access SQL Server and set the value to ON. Wrong! http://www.thebestcsharpprogrammerintheworld.com/blogs/Inserting-Parent-Child-records-using-NHibernate-IDENTITY-INSERT-OFF.aspx http://www.thebestcsharpprogrammerintheworld.com/blogs/Inserting-Parent-Child-records-using-NHibernate-IDENTITY-INSERT-OFF.aspx Tue, 3 Jul 2012 00:00:01 +0000 NHibernate It is possible to optionally pass a parameter using C#. However, the optional parameter must have a default value and they (it) must come at the end of the parameter http://www.thebestcsharpprogrammerintheworld.com/blogs/How-to-use-Optional-parameters.aspx http://www.thebestcsharpprogrammerintheworld.com/blogs/How-to-use-Optional-parameters.aspx Sun, 17 Jun 2012 00:00:02 +0000 C# In a situation where I have a DataGrid which is being bound to a List of a specific class and the DataGrid has AutoGenerateColumns set to true, I found myself needing a way to hide some of the columns which I did not want to http://www.thebestcsharpprogrammerintheworld.com/blogs/How-to-hide-a-DataGrid-column-in-WPF.aspx http://www.thebestcsharpprogrammerintheworld.com/blogs/How-to-hide-a-DataGrid-column-in-WPF.aspx Sun, 17 Jun 2012 00:00:01 +0000 WPF I needed to convert a selection from a treeview into an XML string and then store into a database column of type LONG on Oracle and/or of type varchar(MAX) on MS SQL Server. The XML was not saved as a file first, so true it could have been saved in a string column, however, http://www.thebestcsharpprogrammerintheworld.com/blogs/How-to-convert-a-string-to-a-byte-array-or-convert-a-byte-array-to-a-string.aspx http://www.thebestcsharpprogrammerintheworld.com/blogs/How-to-convert-a-string-to-a-byte-array-or-convert-a-byte-array-to-a-string.aspx Tue, 01 May 2012 00:00:04 +0000 C# There are a number of name differences between a windows form and a WPF program. For example, in a windows form program the event which is triggered when a user double-clicks on a data grid is called Doubleclick. The event in a WPF program is called MouseDoubleClick. Therefore http://www.thebestcsharpprogrammerintheworld.com/blogs/How-to-capture-double-click-event-in-Data-Grid-row-using-WPF.aspx http://www.thebestcsharpprogrammerintheworld.com/blogs/How-to-capture-double-click-event-in-Data-Grid-row-using-WPF.aspx Tue, 01 May 2012 00:00:03 +0000 C# I needed to save an XML formatted file as a string which required double quotes around the attributes. The below code shows how to add double quotes to a http://www.thebestcsharpprogrammerintheworld.com/blogs/How-to-add-double-quotes-to-a-string.aspx http://www.thebestcsharpprogrammerintheworld.com/blogs/How-to-add-double-quotes-to-a-string.aspx Tue, 01 May 2012 00:00:02 +0000 C# The way a problem is approached can have some serious consequences. Take for example the task I had to add some data to a DataGrid in WPF and allow a user to select the rows. When the rows were selected I would capture the details and put them into http://www.thebestcsharpprogrammerintheworld.com/blogs/Get-column-value-from-DataGrid-NewItemPlaceholder-WPF-DataRowView-and-exception.aspx http://www.thebestcsharpprogrammerintheworld.com/blogs/Get-column-value-from-DataGrid-NewItemPlaceholder-WPF-DataRowView-and-exception.aspx Tue, 01 May 2012 00:00:01 +0000 C# This was a tough one. I got everything working just fine with the mappings and my classes, I even wrote some test code to check if the Parent Child data was being inserted ok. What I failed to do was create the FOREIGN http://www.thebestcsharpprogrammerintheworld.com/blogs/Foreign-Key-constraint-conflict-Parent-Child-using-NHibernate.aspx http://www.thebestcsharpprogrammerintheworld.com/blogs/Foreign-Key-constraint-conflict-Parent-Child-using-NHibernate.aspx Sun, 01 Apr 2012 00:00:05 +0000 NHibernate This one was a toughy. I searched for some time looking for examples about HOW TO: INSERT PARENT / CHILD RELATIONSHIPS using NHIBERNATE. What I found were these really cool looking object oriented AddChild methods, many-to-one and one-to-many mapping relationships. The thing about those http://www.thebestcsharpprogrammerintheworld.com/blogs/Foreign-Key-is-always-0-zero-when-inserting-parent-child-using-nhibernate.aspx http://www.thebestcsharpprogrammerintheworld.com/blogs/Foreign-Key-is-always-0-zero-when-inserting-parent-child-using-nhibernate.aspx Sun, 01 Apr 2012 00:00:04 +0000 NHibernate The .NET framework provides a set of base class libraries which provide functions and features which can be used with any programming language which implements .NET, such as Visual Basic, C# (or course), http://www.thebestcsharpprogrammerintheworld.com/fundamentals/Base-Class-Library.aspx http://www.thebestcsharpprogrammerintheworld.com/fundamentals/Base-Class-Library.aspx Sun, 01 Apr 2012 00:00:03 +0000 C# Runtime, in computer terms, is the time in which the computer program is actively executing the written code. The Common Language Runtime is a platform where a http://www.thebestcsharpprogrammerintheworld.com/fundamentals/Common-Language-Runtime.aspx http://www.thebestcsharpprogrammerintheworld.com/fundamentals/Common-Language-Runtime.aspx Sun, 01 Apr 2012 00:00:02 +0000 C# DLL Hell. Enough said, well maybe not. Before .NET every installation of a new version of a program or the installation of any program was a gamble. There was always a risk that a necessary component required to run the new version would overwrite a component which is used by another causing the old program to http://www.thebestcsharpprogrammerintheworld.com/fundamentals/Simplifying-Deployment.aspx http://www.thebestcsharpprogrammerintheworld.com/fundamentals/Simplifying-Deployment.aspx Sun, 01 Apr 2012 00:00:01 +0000 C# The Navigation functionality of WPF is pretty cool. It lets the developer create a wizard like program which walks the user through a number of consecutive steps from start to finish. All of which happens within a http://www.thebestcsharpprogrammerintheworld.com/blogs/Disable-navigation-buttons-and-navigation-history-within-a-WPF-Navigation-Page-program.aspx http://www.thebestcsharpprogrammerintheworld.com/blogs/Disable-navigation-buttons-and-navigation-history-within-a-WPF-Navigation-Page-program.aspx Thu, 01 Mar 2012 00:00:04 +0000 WPF The 2 controls above create either a GUID or a Sequential GUID. Generate a Radom GUID online or a Generate a Sequential GUID online using the above control. There is nothing too complicated about creating a random GUID. Using http://www.thebestcsharpprogrammerintheworld.com/blogs/Create-a-Random-or-Sequential-GUID.aspx http://www.thebestcsharpprogrammerintheworld.com/blogs/Create-a-Random-or-Sequential-GUID.aspx Thu, 01 Mar 2012 00:00:03 +0000 C# I needed to create an executable which would run as a job triggered from a scheduler. I decided to create a Console application, using, of course C#. I wanted it to run without the Console window popping up. I asked myself, how do I stop the console window from popping up or http://www.thebestcsharpprogrammerintheworld.com/blogs/Create-an-exe-executable-and-hide-the-console-window.aspx http://www.thebestcsharpprogrammerintheworld.com/blogs/Create-an-exe-executable-and-hide-the-console-window.aspx Thu, 01 Mar 2012 00:00:02 +0000 C# Recently, I had the requirement to join 2 dictionaries together. I needed to build a DataTable and an NHibernate HQL query dynamically where the column headings could be different than the name of the actual database column name. To do this I http://www.thebestcsharpprogrammerintheworld.com/blogs/Combine-dictionary-combine-2-dictionaries-together.aspx http://www.thebestcsharpprogrammerintheworld.com/blogs/Combine-dictionary-combine-2-dictionaries-together.aspx Thu, 01 Mar 2012 00:00:01 +0000 C# I was working on a system which had implemented NHibernate, primarily for its ability to support multiple DBMS, such as Oracle and MS SQL Server. The problem came up when trying to insert, specifically in regards to http://www.thebestcsharpprogrammerintheworld.com/blogs/Attempted-overcomplicated-solution-for-a-complicated-system.aspx http://www.thebestcsharpprogrammerintheworld.com/blogs/Attempted-overcomplicated-solution-for-a-complicated-system.aspx Wed, 01 Feb 2012 00:00:01 +0000 NHIBERNATE I created a WPF project which included a DataGrid which present a Status. It looked liked this. I didn’t really like the representation of the True, False, Null and decided to convert the value to either a Green, Yellow or Red image http://www.thebestcsharpprogrammerintheworld.com/blogs/Add-images-dynamically-to-WPF-DataGrid-using-IValueConverter.aspx http://www.thebestcsharpprogrammerintheworld.com/blogs/Add-images-dynamically-to-WPF-DataGrid-using-IValueConverter.aspx Wed, 01 Feb 2012 00:00:03 +0000 WRF I found some very creative and technically challenging examples for adding a masked textbox control to a WPF program. Most of them required the creation of a new class inherited from the base System.Windows.Controls.TextBox class. This is a valid http://www.thebestcsharpprogrammerintheworld.com/blogs/Add-a-Masked-Textbox-control-to-a-WPF-program.aspx http://www.thebestcsharpprogrammerintheworld.com/blogs/Add-a-Masked-Textbox-control-to-a-WPF-program.aspx Wed, 01 Feb 2012 00:00:02 +0000 WPF You can see on the Blog.Archive() navigation bar on the right of this page that I present the Year, Month and number of blogs which I have written each month. Everything worked fine from http://www.thebestcsharpprogrammerintheworld.com/blogs/How-to-sort-by-month-in-SQL-Server.aspx http://www.thebestcsharpprogrammerintheworld.com/blogs/How-to-sort-by-month-in-SQL-Server.aspx Wed, 01 Feb 2012 00:00:01 +0000 SQL In a previous post I covered how to perform filtering using the ListCollectionView class on a datagrid. What I noticed on the implementation on a larger result set was a little lag in the response when characters were being entered into the filter textbox. The way http://www.thebestcsharpprogrammerintheworld.com/blogs/Using-the-ListCollectionView-with-a-defered-Filter-method-in-WPF.aspx http://www.thebestcsharpprogrammerintheworld.com/blogs/Using-the-ListCollectionView-with-a-defered-Filter-method-in-WPF.aspx Sun, 01 Jan 2012 00:00:04 +0000 WPF NOTE: This solution does not implement paging and requires the retrieval of the entire result set. If your dataset is huge, I wouldn’t go this route. Other options, LIKE http://www.thebestcsharpprogrammerintheworld.com/blogs/Using-the-ListCollectionView-Filter-method-in-WPF.aspx http://www.thebestcsharpprogrammerintheworld.com/blogs/Using-the-ListCollectionView-Filter-method-in-WPF.aspx Sun, 01 Jan 2012 00:00:03 +0000 WPF I made the mistake of using the SelectionChange event on a textbox while implementing some filtering on a DataGrid. What happened, when using SelectionChanged, was that each time the textbox received focus I was executing the filter. Even initially when there was nothing to filter. My logic was checking if the contents of the textbox contained a value or not. However, because the http://www.thebestcsharpprogrammerintheworld.com/blogs/TextChanged-vsSelectionChange-events-in-WPF.aspx http://www.thebestcsharpprogrammerintheworld.com/blogs/TextChanged-vsSelectionChange-events-in-WPF.aspx Sun, 01 Jan 2012 00:00:02 +0000 WPF I implemented some filtering into one of my DataGrids which required that a reset the initial result set. With a single line of code you can empty out the contents of the http://www.thebestcsharpprogrammerintheworld.com/blogs/How-to-clear-the-data-from-a-DataGrid-using-WPF.aspx http://www.thebestcsharpprogrammerintheworld.com/blogs/How-to-clear-the-data-from-a-DataGrid-using-WPF.aspx Sun, 01 Jan 2012 00:00:01 +0000 WPF There were some good answers but none of them provided me with a work around that was database independent. At least something that would work with both Oracle and http://www.thebestcsharpprogrammerintheworld.com/blogs/Using-ODP-Net-with-NHibernate-and-System-Decimal.aspx http://www.thebestcsharpprogrammerintheworld.com/blogs/Using-ODP-Net-with-NHibernate-and-System-Decimal.aspx Thu, 01 Dec 2011 00:00:02 +0000 ODP.Net The other day I needed to implement a search function in a WPF program. I wanted the use to be able to enter the criteria and then the enter key to perform the search. I achieved http://www.thebestcsharpprogrammerintheworld.com/blogs/Capture-textbox-enter-key-event.aspx http://www.thebestcsharpprogrammerintheworld.com/blogs/Capture-textbox-enter-key-event.aspx Thu, 01 Dec 2011 00:00:01 +0000 C# I once had a requirement that I needed to dynamically build a select statement, based on a users selection and then display the results in a DataGrid. The tricky part was that the column name in the select portion of the query was not always the http://www.thebestcsharpprogrammerintheworld.com/blogs/How-to-convert-Dictiionary-keys-or-values-to-a-List.aspx http://www.thebestcsharpprogrammerintheworld.com/blogs/How-to-convert-Dictiionary-keys-or-values-to-a-List.aspx Tue, 01 Nov 2011 00:00:06 +0000 C# Some time ago I had to implement a search box which filtered a result set in a DataGrid. It was a pretty straight forward exercise. However, it took some time to find a good example and change it into http://www.thebestcsharpprogrammerintheworld.com/blogs/How-to-add-a-watermark-to-a-textbox-using-WPF.aspx http://www.thebestcsharpprogrammerintheworld.com/blogs/How-to-add-a-watermark-to-a-textbox-using-WPF.aspx Tue, 01 Nov 2011 00:00:05 +0000 WPF In .NET Framework 4, C# supports covariance and contravariance in generic interfaces and delegates. However, if you try to implement either in a class, you will receive an exception. Trying to implement covariance in a return type or overriding a method and attempting to http://www.thebestcsharpprogrammerintheworld.com/blogs/Different-return-type-from-a-method-of-a-derived-class.aspx http://www.thebestcsharpprogrammerintheworld.com/blogs/Different-return-type-from-a-method-of-a-derived-class.aspx Tue, 01 Nov 2011 00:00:04 +0000 C# I wanted to create an interface; however one of the methods I wanted to implement in it had a class as a parameter. I thought about it and realized that be doing so I would be tightly binding my interface to a specific class. I didn’t think that was good practice because interfaces need to be implemented into any http://www.thebestcsharpprogrammerintheworld.com/blogs/Using-Generics-with-Interfaces.aspx http://www.thebestcsharpprogrammerintheworld.com/blogs/Using-Generics-with-Interfaces.aspx Tue, 01 Nov 2011 00:00:03 +0000 C# The String class in .Net has many capabilities. Below is a list of some string methods I use frequently in my development projects. Even when I have completed this list, I am sure it will over cover 5% of the capabilities within the String class. After reading this, I suggest you look over the http://www.thebestcsharpprogrammerintheworld.com/blogs/Generic-Type-Parameters-parameter-interface-csharp.aspx http://www.thebestcsharpprogrammerintheworld.com/blogs/Generic-Type-Parameters-parameter-interface-csharp.aspx Tue, 01 Nov 2011 00:00:02 +0000 C# In a previous blog I discussed how to use and implement an interface with generics. I decided shortly after that it would be a good idea, in my context, to loosely bind a type to the interface. In the previous blog it was left 100% generic and that http://www.thebestcsharpprogrammerintheworld.com/blogs/Generic-Interface-with-a-type-constraint.aspx http://www.thebestcsharpprogrammerintheworld.com/blogs/Generic-Interface-with-a-type-constraint.aspx Tue, 01 Nov 2011 00:00:01 +0000 C# It took me some time to find out that you cannot have periods “.” in the column name of dynamically created DataTables. I would run the query, created the columns and add the rows to the table, but nothing would show in the DataGrid when I bound http://www.thebestcsharpprogrammerintheworld.com/blogs/No-data-in-dynamically-created-DataTable.aspx http://www.thebestcsharpprogrammerintheworld.com/blogs/No-data-in-dynamically-created-DataTable.aspx Sun, 02 Oct 2011 00:00:06 +0000 WPF I added the below to my resource files. The name is the same for each of the resource files, however the value is different per localization - language. English, German and http://www.thebestcsharpprogrammerintheworld.com/blogs/Access-Localization-Resources-in-WPF-from-the-code-behind.aspx http://www.thebestcsharpprogrammerintheworld.com/blogs/Access-Localization-Resources-in-WPF-from-the-code-behind.aspx Sun, 02 Oct 2011 00:00:05 +0000 C# I was developing a WPF application that contained a DataGrid like so many times in the past. However, this time it was taking 20-30 seconds for the DataGrid to render. I checked the query execution speed. I was building the DataTable dynamically, but I checked the http://www.thebestcsharpprogrammerintheworld.com/blogs/WPF-DataGrid-rendering-is-very-slow.aspx http://www.thebestcsharpprogrammerintheworld.com/blogs/WPF-DataGrid-rendering-is-very-slow.aspx Sun, 02 Oct 2011 00:00:04 +0000 WPF I realized that I had set the IsExpanded property of the treeview within a setter for my treeview resources with a value of True. This meant that all nodes within the treeview would be expanded. If I set it to False it meant that all child nodes would be closed and we would see only a single line. I didn’t want either. What I wanted was to expand the first http://www.thebestcsharpprogrammerintheworld.com/blogs/Expand-first-level-of-treeview-item-or-node-using-WPF.aspx http://www.thebestcsharpprogrammerintheworld.com/blogs/Expand-first-level-of-treeview-item-or-node-using-WPF.aspx Sun, 02 Oct 2011 00:00:03 +0000 WPF I wanted a treeviews max height to be about 15% smaller than the window hosting it. This was because I wasn’t able to get (could not get) the vertical scrollbar for the treeview to show up without setting the MaxHeight property http://www.thebestcsharpprogrammerintheworld.com/blogs/Setting-the-scrollbar-for-a-treeview-in-WPF.aspx http://www.thebestcsharpprogrammerintheworld.com/blogs/Setting-the-scrollbar-for-a-treeview-in-WPF.aspx Sun, 02 Oct 2011 00:00:02 +0000 WPF There is a pretty basic reason why this error happens. However, until you find the solution, it is a big deal. I was creating a simple base class like the below which I planned on extending in another http://www.thebestcsharpprogrammerintheworld.com/blogs/Error-Class-name-is-inaccessible-due-to-its-protection-level.aspx http://www.thebestcsharpprogrammerintheworld.com/blogs/Error-Class-name-is-inaccessible-due-to-its-protection-level.aspx Sun, 02 Oct 2011 00:00:01 +0000 C# Like I've said before, once you find what your looking for, it is wasy to find examples about how to use and implement it. I had this again while trying to add images to a treeview. The term I was looking for, while trying to find a solution was ValueConverter. In this solution I will use a ValueConveter to convert a treeview header to an image. It is really quit simple to do this. It was hard to find the solution than it was to http://www.thebestcsharpprogrammerintheworld.com/blogs/Adding-images-to-a-Tree-View-in-WPF.aspx http://www.thebestcsharpprogrammerintheworld.com/blogs/Adding-images-to-a-Tree-View-in-WPF.aspx Thu, 01 Sep 2011 00:00:07 +0000 C# I read this very cool article and I had to test it out for myself. I can say that for sure that if the pattern of your IF THEN statements are predictable, that you code will run faster. This is due to a concept called Branch Prediction that is located on the CPU. Basically, the digital circuit tries to guess which way a branch will go before it knows for sure. Therefore, if the http://www.thebestcsharpprogrammerintheworld.com/blogs/How-to-make-your-code-faster-when-you-use-IF-THEN.aspx http://www.thebestcsharpprogrammerintheworld.com/blogs/How-to-make-your-code-faster-when-you-use-IF-THEN.aspx Thu, 01 Sep 2011 00:00:06 +0000 C# I was lucky enough to be able to develop a relatively complicated recursive process twice. They didn't do exactly the same same and were different enough that I was not able to reuse the first implementation completely. What I had to do was build a treeview from a hierachrry of data and reflection objects, capture the results, process them http://www.thebestcsharpprogrammerintheworld.com/blogs/Recursively-traverse-an-XML-document-using-the-Action-delegate.aspx http://www.thebestcsharpprogrammerintheworld.com/blogs/Recursively-traverse-an-XML-document-using-the-Action-delegate.aspx Thu, 01 Sep 2011 00:00:05 +0000 C# I used this code to perform a search of a Lucene.Net index. Put these lines of code within a for loop. Reading in the source code I found that the Search method which returns a Hits class will be depreciated in 3.0. Eventhough the above worked, I decided to implement a solution that will work with future versions of Lucene.Net. Below is what I change my http://www.thebestcsharpprogrammerintheworld.com/blogs/How-to-search-a-Lucene-Net-index.aspx http://www.thebestcsharpprogrammerintheworld.com/blogs/How-to-search-a-Lucene-Net-index.aspx Thu, 01 Sep 2011 00:00:04 +0000 Lucene.Net On one of my projects I had to provide treeview selection functionality. I searched the internet and pulled everything I could into a this single resource. I wasn't able to find 1 post that provided all the details and source code to do what I needed. Now there is one and if you find it, I http://www.thebestcsharpprogrammerintheworld.com/blogs/Treeview-with-checkbox-in-WPF-using-csharp.aspx http://www.thebestcsharpprogrammerintheworld.com/blogs/Treeview-with-checkbox-in-WPF-using-csharp.aspx Thu, 01 Sep 2011 00:00:03 +0000 WPF In my previous post I showed you how I added a context menu to a treeview. I had a new requirement that wanted a treeview property to contain a flag that could be turned on or off and that the value be displayed in the http://www.thebestcsharpprogrammerintheworld.com/blogs/Adding-a-context-menu-to-a-treeview-Part-2.aspx http://www.thebestcsharpprogrammerintheworld.com/blogs/Adding-a-context-menu-to-a-treeview-Part-2.aspx Thu, 01 Sep 2011 00:00:02 +0000 C# The String class in .Net has many capabilities. Below is a list of some string methods I use frequently in my development projects. Even when I have completed this list, I am sure it will over cover 5% of the capabilities within the String class. After reading this, I suggest you look over the http://www.thebestcsharpprogrammerintheworld.com/fundamentals/Strings.aspx http://www.thebestcsharpprogrammerintheworld.com/fundamentals/Strings.aspx Thu, 01 Sep 2011 00:00:01 +0000 C# In all of my NHibernate implementations I serialize the startup. It saves a noticeable amount of time. We know that without it, NHibernate validates all the mapping files each time we start the program. If we only have 1 or 2 simple files it is not a problem, however, if http://www.thebestcsharpprogrammerintheworld.com/blogs/NHibernate-Serialized-startup.aspx http://www.thebestcsharpprogrammerintheworld.com/blogs/NHibernate-Serialized-startup.aspx Mon, 01 Aug 2011 00:00:09 +0000 NHibernate I was in a meeting where we had a discussion about keeping the modifications made to a database synchronized with the NHibernate mappings. Some said that there was a method called Validate() which just needed to be run and that all that was needed. I was right, it would turn out to be http://www.thebestcsharpprogrammerintheworld.com/blogs/NHibernate-SchemaValidator-TestConfigurationHelper.aspx http://www.thebestcsharpprogrammerintheworld.com/blogs/NHibernate-SchemaValidator-TestConfigurationHelper.aspx Mon, 01 Aug 2011 00:00:08 +0000 NHibernate An important step which is often overlooked when beginning the process of mapping your database is to set the Build Action to Embedded Resource. (Buildvorgang – Eingebettete Resource). If you forget to do this you may receive a QuerySynataxException stating that http://www.thebestcsharpprogrammerintheworld.com/blogs/Nhibernate-QuerySyntaxException-is-not-mapped-from.aspx http://www.thebestcsharpprogrammerintheworld.com/blogs/Nhibernate-QuerySyntaxException-is-not-mapped-from.aspx Mon, 01 Aug 2011 00:00:07 +0000 NHibernate If you receive this error then you have probably mixed up some data types between your class (class.cs) file and your mapping (class.hbm.xlm) file. For example you have a property defined in your class file as a string and then in your mapping file as an int. To repair the PropertyAccessException Invalid http://www.thebestcsharpprogrammerintheworld.com/blogs/NHibernate-PropertyAccessException-Invalid-Cast-specified-cast-is-not-valid.aspx http://www.thebestcsharpprogrammerintheworld.com/blogs/NHibernate-PropertyAccessException-Invalid-Cast-specified-cast-is-not-valid.aspx Mon, 01 Aug 2011 00:00:06 +0000 NHibernate One of the awesome capabilities of NHibernate is its 1st and 2nd level caching functionality. Each time a query is submitted for execution NHibernate first looks in the cache for the entity before taking the query to the database and selecting the http://www.thebestcsharpprogrammerintheworld.com/blogs/NHibernate-object-with-same-identifier-value-was-already-associated.aspx http://www.thebestcsharpprogrammerintheworld.com/blogs/NHibernate-object-with-same-identifier-value-was-already-associated.aspx Mon, 01 Aug 2011 00:00:05 +0000 NHibernate The following error is generally caused when there is a misspelling or case miss match between the class file and the mapping file. Review the contents of both and confirm spelling and case are the same so that the ‘Could not compile the mapping http://www.thebestcsharpprogrammerintheworld.com/blogs/Nhibernate-MappingException-could-not-compile-the-mapping-document.aspx http://www.thebestcsharpprogrammerintheworld.com/blogs/Nhibernate-MappingException-could-not-compile-the-mapping-document.aspx Mon, 01 Aug 2011 00:00:04 +0000 NHibernate Sometime things don’t always go as planned. I was making some nice progress with the process of mapping a database and all of a sudden I get the following compile time error http://www.thebestcsharpprogrammerintheworld.com/blogs/NHibernate-mapping-experience-with-an-ambiguous-reference.aspx http://www.thebestcsharpprogrammerintheworld.com/blogs/NHibernate-mapping-experience-with-an-ambiguous-reference.aspx Mon, 01 Aug 2011 00:00:03 +0000 NHibernate Using the star (*) as the first character of a Lucene.Net search is not supported by default. It will return null results if it is not turned on. To turn on the support for leading wild card characters you must set the SetAllowLeadingWildcard property to true. Then you will be able to use wildcard search parameters as the leading http://www.thebestcsharpprogrammerintheworld.com/blogs/Lucene-Net-search-with-star-wildcard-as-first-character.aspx http://www.thebestcsharpprogrammerintheworld.com/blogs/Lucene-Net-search-with-star-wildcard-as-first-character.aspx Mon, 01 Aug 2011 00:00:02 +0000 Lucene.Net I used this code to create a Lucene.Net 2.9.2 index. When I used this code to perform the search, it only returned results searching with numeric values. When I changed it to the below logic, it worked. I received results with letters and-or numbers. http://www.thebestcsharpprogrammerintheworld.com/blogs/Lucene-NET-returns-results-only-when-using-numeric-values.aspx http://www.thebestcsharpprogrammerintheworld.com/blogs/Lucene-NET-returns-results-only-when-using-numeric-values.aspx Mon, 01 Aug 2011 00:00:01 +0000 Lucene.Net In a job interview I had once, I was asked, 'How do you store a Boolean in a database?' My first reaction was to say, True, False, 0, 1, Y or N. However, this question has some depth to it. I do not know why, if you do let me know, but there are no Boolean data type on SQL Server or Oracle. Therefore, we are required to choose our own variable for storing http://www.thebestcsharpprogrammerintheworld.com/fundamentals/BooleanAndBools.aspx http://www.thebestcsharpprogrammerintheworld.com/fundamentals/BooleanAndBools.aspx Fri, 01 Jul 2011 00:00:09 +0000 C# This is a fairly common error message which a programmer will receive during the NHibernate mapping process. The inner exception was: http://www.thebestcsharpprogrammerintheworld.com/blogs/NHibernate-MappingException-could-not-compile-mapping-document.aspx http://www.thebestcsharpprogrammerintheworld.com/blogs/NHibernate-MappingException-could-not-compile-mapping-document.aspx Fri, 01 Jul 2011 00:00:08 +0000 NHibernate During the mapping process you may encounter this error. In my situation the case was that I had the wrong namespace identified within the class attribute within a bag element containing a one-to-many element, like the http://www.thebestcsharpprogrammerintheworld.com/blogs/NHibernate-MappingException-association-references-unmapped-class.aspx http://www.thebestcsharpprogrammerintheworld.com/blogs/NHibernate-MappingException-association-references-unmapped-class.aspx Fri, 01 Jul 2011 00:00:07 +0000 NHibernate When you are creating your mapping files for which NHibernate uses to know the data types and relationships of the data model, you are likely to receive this error message: An association from the table TABLENAME refers to an unmapped http://www.thebestcsharpprogrammerintheworld.com/blogs/NHibernate-MappingException-an-association-from-the-table-refers-to-an-unmapped-class.aspx http://www.thebestcsharpprogrammerintheworld.com/blogs/NHibernate-MappingException-an-association-from-the-table-refers-to-an-unmapped-class.aspx Fri, 01 Jul 2011 00:00:06 +0000 NHibernate This is a pretty common error which can be caused by a large number of reasons. I received the below error: GenericADOExcpetion could not execute query select SQL: select. While I was implemented the TrueFalse NHibernate data type. What I did was in my class http://www.thebestcsharpprogrammerintheworld.com/blogs/NHibernate-GenericADOException-could-not-execute-query2.aspx http://www.thebestcsharpprogrammerintheworld.com/blogs/NHibernate-GenericADOException-could-not-execute-query2.aspx Fri, 01 Jul 2011 00:00:05 +0000 NHibernate During the mapping process or after a data model change you may receive this error. The error message being: could not execute query select from TABLE with an inner exception of http://www.thebestcsharpprogrammerintheworld.com/blogs/Nhibernate-GenericADOException-could-not-execute-query1.aspx http://www.thebestcsharpprogrammerintheworld.com/blogs/Nhibernate-GenericADOException-could-not-execute-query1.aspx Fri, 01 Jul 2011 00:00:04 +0000 NHibernate Common sense, maybe..., worthy of a blog, absolutely. I was creating an ordering system using NHibernate and the table which stored the orders was called ORDER. This resulted in an error, which I believe would come from any data retrieval source, I just happen to be using NHibernate http://www.thebestcsharpprogrammerintheworld.com/blogs/NHibernate-error-incorrect-syntax-near-the-keyword.aspx http://www.thebestcsharpprogrammerintheworld.com/blogs/NHibernate-error-incorrect-syntax-near-the-keyword.aspx Fri, 01 Jul 2011 00:00:03 +0000 NHibernate This is a pretty easy one to solve. This happens because the column attribute in the mapping file does not exist on the database being accessed http://www.thebestcsharpprogrammerintheworld.com/blogs/NHibernate-could-not-execute-query-ORA-00904-invalid-identifier.aspx http://www.thebestcsharpprogrammerintheworld.com/blogs/NHibernate-could-not-execute-query-ORA-00904-invalid-identifier.aspx Fri, 01 Jul 2011 00:00:02 +0000 NHibernate I was in the process of pointing my NHibernate to an Oracle 10g instance using ODP.Net and I received the below error message: The connection.driver_class must be specified in the http://www.thebestcsharpprogrammerintheworld.com/blogs/NHibernate-connection-driver-must-be-specified-in-the-configuration-section.aspx http://www.thebestcsharpprogrammerintheworld.com/blogs/NHibernate-connection-driver-must-be-specified-in-the-configuration-section.aspx Fri, 01 Jul 2011 00:00:01 +0000 NHibernate The newest release is as BETA 1 when writing this blog an it contains some new and nice features. One of my favorite is that as a programmer we no longer need to configure a proxy. It was always a little confusing knowing which one to http://www.thebestcsharpprogrammerintheworld.com/blogs/NHibernate-3-2-What-s-New.aspx http://www.thebestcsharpprogrammerintheworld.com/blogs/NHibernate-3-2-What-s-New.aspx Fri, 03 Jun 2011 00:00:08 +0000 NHibernate A blog would not be complete without an article about the differences between appending or modifying a string using the String Class versus the StingBuilder class. See, strings are immutable, which means once they are created they cannot be changed. Any time you make a modification to a string, after is has been created you are actually creating a new string object in memory. Each time http://www.thebestcsharpprogrammerintheworld.com/blogs/String-vs-StringBuilder.aspx http://www.thebestcsharpprogrammerintheworld.com/blogs/String-vs-StringBuilder.aspx Wed, 01 Jun 2011 00:00:07 +0000 C# Holistic approach or high level approach are common phrases you will hear when beginning the design of a new system or the start of a new project that will modify or enhance an existing program. Therefore, when you begin a new project, start from the solution context. This means, know what http://www.thebestcsharpprogrammerintheworld.com/blogs/Projects-and-Solutions-in-Net-csproj-and-sln.aspx http://www.thebestcsharpprogrammerintheworld.com/blogs/Projects-and-Solutions-in-Net-csproj-and-sln.aspx Wed, 01 Jun 2011 00:00:06 +0000 C# I created a video a while ago that discussed how to implement a progress bar in a windows form application. It used the System.Thread class library and the the BackgroundWorker class. With the release of .Net 4, there is http://www.thebestcsharpprogrammerintheworld.com/blogs/Progress-Bar-Multithread-in-WPF.aspx http://www.thebestcsharpprogrammerintheworld.com/blogs/Progress-Bar-Multithread-in-WPF.aspx Wed, 01 Jun 2011 00:00:05 +0000 C# Creating a simple 'Hello World'-like WCF service is very simple with Visual Studio 2010. Open Visual Studio 2010 and select New => Project => WCF Service. Name it for example, HelloWorldWCF. It will initially create 2 http://www.thebestcsharpprogrammerintheworld.com/blogs/Create-and-Consume-a-WCF-Windows-Communication-Foundation-service.aspx http://www.thebestcsharpprogrammerintheworld.com/blogs/Create-and-Consume-a-WCF-Windows-Communication-Foundation-service.aspx Wed, 01 Jun 2011 00:00:04 +0000 C# Contstants come in handy when you need to store values that will be used frequently within the system and at the same time will not change often, if ever. You want to avoid hard coding values in you code. It makes maintenance and debugging very http://www.thebestcsharpprogrammerintheworld.com/fundamentals/Constants-and-Enum.aspx http://www.thebestcsharpprogrammerintheworld.com/fundamentals/Constants-and-Enum.aspx Wed, 01 Jun 2011 00:00:03 +0000 C# I was writing some new code that would use NHibernate a few days back and while I was testing it I received thie error: Could not execute query http://www.thebestcsharpprogrammerintheworld.com/blogs/NHibernate-could-not-execute-query-SQL-SQL-not-available.aspx http://www.thebestcsharpprogrammerintheworld.com/blogs/NHibernate-could-not-execute-query-SQL-SQL-not-available.aspx Wed, 01 Jun 2011 00:00:02 +0000 NHibernate I wrote a program a few months back that populated a dropdown list with contents from a class using reflection. I used a normal for each statement http://www.thebestcsharpprogrammerintheworld.com/blogs/How-to-use-Data-Parallelism-from-the-Task-Parallel-Library.aspx http://www.thebestcsharpprogrammerintheworld.com/blogs/How-to-use-Data-Parallelism-from-the-Task-Parallel-Library.aspx Wed, 01 Jun 2011 00:00:01 +0000 C# A few weeks ago I had to fend off a hacker. Some of the database statements I created for another website were susceptible to SQL injection. This means I created the statements like http://www.thebestcsharpprogrammerintheworld.com/blogs/Hacked1.aspx http://www.thebestcsharpprogrammerintheworld.com/blogs/Hacked1.aspx Thu, 12 May 2011 01:00:00 +0000 C# With .Net 4.0, we no longer need to download and install the Chart Control to get charting capabilities in ASP.Net, Window Forms or WPF. This is becuase the the Charting control is now part of http://www.thebestcsharpprogrammerintheworld.com/blogs/How-to-create-a-Pie-chart-using-ASPNET-and-C-sharp.aspx http://www.thebestcsharpprogrammerintheworld.com/blogs/How-to-create-a-Pie-chart-using-ASPNET-and-C-sharp.aspx Fri, 6 May 2011 04:00:00 +0000 C# The first things you need to note is that the treeview node needs to be selected in order for you to get any information from it. I did read some articles about using the System.Windows.Point to get the X, Y coordinates of the mouse, but I chose to go another route. Using the Point class just seemed too distant from what I was trying to achieve. I mean, it seemed http://www.thebestcsharpprogrammerintheworld.com/blogs/How-to-get-a-treeview-item-node-value-using-a-ContextMenu-using-WPF-and-C-sharp.aspx http://www.thebestcsharpprogrammerintheworld.com/blogs/How-to-get-a-treeview-item-node-value-using-a-ContextMenu-using-WPF-and-C-sharp.aspx Fri, 6 May 2011 03:00:00 +0000 C# I know we as programmers like to write code. However, most of the time we don't get to start from the beginning. Most often we get to modify and enhance code that has been written by someone else. Let's make a deal, from now on let's document our code so we don't have to spend so long trying to http://www.thebestcsharpprogrammerintheworld.com/blogs/Sandcastle-XML-documentation-for-Visual-Studio-and-C-sharp-How-to-install-and-configure-Sandcastle.aspx http://www.thebestcsharpprogrammerintheworld.com/blogs/Sandcastle-XML-documentation-for-Visual-Studio-and-C-sharp-How-to-install-and-configure-Sandcastle.aspx Fri, 6 May 2011 02:00:00 +0000 C# There is a very significant difference between a field and propoerty within a class. The difference is in the behaviour of the field when defined as either a static or instance. Basically, if you create 2 instances of class which has a static field, when you change the value of that field, the values in both classes are changed. This may be needed in some requirements but you need http://www.thebestcsharpprogrammerintheworld.com/blogs/Fields-vs-Properties.aspx http://www.thebestcsharpprogrammerintheworld.com/blogs/Fields-vs-Properties.aspx Fri, 6 May 2011 01:00:00 +0000 C# There are a number of ways you can do this. In this example I will use the ConfigurationManager libraries that are part of the .Net Framework. This group of methods and properties are created specifically for this purpose. I am a firm believer that every action we want to take as a programmer needs to be done using the correct library. It would be possible to http://www.thebestcsharpprogrammerintheworld.com/blogs/How-to-read-from-and-write-to-an-appConfig-or-webConfig.aspx http://www.thebestcsharpprogrammerintheworld.com/blogs/How-to-read-from-and-write-to-an-appConfig-or-webConfig.aspx Sun, 1 May 2011 03:00:00 +0000 C# XML Schema files (.xsd) are files which provide data for IntelliSense and are often provided along with a 3rd party class library. In case you are not familiar with IntelliSense, it is a functionality that helps you develop or configure a system by providing a list of existing methods http://www.thebestcsharpprogrammerintheworld.com/blogs/Add-an-XML-Schema-file-to-Visual-Studio-2010.aspx http://www.thebestcsharpprogrammerintheworld.com/blogs/Add-an-XML-Schema-file-to-Visual-Studio-2010.aspx Sun, 1 May 2011 02:00:00 +0000 C# The more I use WPF (WIndow Presentation Foundation) the more I like it and the more I see the similiarity with coding HTML pages or ASP.NET pages. Microsoft has really done a good job at seperating the presentation logic from the http://www.thebestcsharpprogrammerintheworld.com/blogs/How-to-set-the-minimum-and-maximum-width-or-height-of-a-column-or-row-using-WPF.aspx http://www.thebestcsharpprogrammerintheworld.com/blogs/How-to-set-the-minimum-and-maximum-width-or-height-of-a-column-or-row-using-WPF.aspx Sun, 1 May 2011 01:00:00 +0000 C# When you add a control to your WPF container you typcally set the width and height to align it within the window and in relation to other controls. An alternative to this is to set the controls margin in relation to the container. This plays an important role when you want to add GridSplitters http://www.thebestcsharpprogrammerintheworld.com/blogs/How-do-Margins-in-WPF-work.aspx http://www.thebestcsharpprogrammerintheworld.com/blogs/How-do-Margins-in-WPF-work.aspx Sun, 1 May 2011 00:00:00 +0000 C# With the release of C# 3.0 came Lambda Expressions. In a previous post I searched a generic list using a delegate, this is becuase, perhaps, I have done so much programming with C# 2.0 that it's just a habit now. Time to move onto better, newer things, like Lambda http://www.thebestcsharpprogrammerintheworld.com/blogs/Find-a-specific-value-within-a-generic-list-with-a-Lambda-Expression.aspx http://www.thebestcsharpprogrammerintheworld.com/blogs/Find-a-specific-value-within-a-generic-list-with-a-Lambda-Expression.aspx Apr 16, 2011 C# I was writing a program that converted a List into a comma delimited string. A later requirement necessitated that I capture data from an additional source and add it to the original comma delimited string. In both cases the data was returned in a generic list, so I only needed to combine the 2 lists into 1 before converting it to a delimited string. In this case, order and uniqueness was not a requirement. It is http://www.thebestcsharpprogrammerintheworld.com/blogs/Combining-2-Generic-Lists-into-1.aspx http://www.thebestcsharpprogrammerintheworld.com/blogs/Combining-2-Generic-Lists-into-1.aspx Apr 6, 2011 C# I have started working with Globalization and Localization functionality for a system I am building. I could not understand why, when I wanted to get the intellisense for the class that nothing showed up. After some time I decided to use the full http://www.thebestcsharpprogrammerintheworld.com/blogs/CulturInfo-not-working-as-expected.aspx http://www.thebestcsharpprogrammerintheworld.com/blogs/CulturInfo-not-working-as-expected.aspx Apr 5, 2011 C# It is commen to have a need to search though a generic list to know if it contains a specific value. This is where the Find() method can be http://www.thebestcsharpprogrammerintheworld.com/blogs/Find-a-specific-value-within-a-generic-list.aspx http://www.thebestcsharpprogrammerintheworld.com/blogs/Find-a-specific-value-within-a-generic-list.aspx Apr 4, 2011 C# If you are like me, your getting a little tired of the tanish green or grey color of the default WPF window. I have been seeing in magazines and on the internet some nice looking GUI's (graphical user interface or windows) and was thinking about how I could implement or develop something like that. I started out changing the background color, changing the button color and then quickly realized that I would need to do some lower level http://www.thebestcsharpprogrammerintheworld.com/blogs/WPF-Using-Templates-and-Themes.aspx http://www.thebestcsharpprogrammerintheworld.com/blogs/WPF-Using-Templates-and-Themes.aspx Apr 3, 2011 WPF I was supprised when I tried to implement an Open File Dialog box in my WPF program that the control did not exist. The control for a Folder Browser Dialog does not exist either. I was able to get them both implement into my WPF program by doing the http://www.thebestcsharpprogrammerintheworld.com/blogs/WPF-OpenFileDialog-and-FolderBrowserDialog.aspx http://www.thebestcsharpprogrammerintheworld.com/blogs/WPF-OpenFileDialog-and-FolderBrowserDialog.aspx Apr 2, 2011 WPF I was developing a WPF application that allowed users to selected as many rows and as many columns that were available in the database. I dynamically built the selection criteria using reflection and a treeview. Then I traversed the treeview and dynamically built the DataGrid that contained the columns and thier values. What I quickly experienced was when the number of columns (horizontal) was large, say +100, scrolling http://www.thebestcsharpprogrammerintheworld.com/blogs/WPF-DataGrid-Navigation-Paging-Up-Down-Sideways-is-slow-virtuaization.aspx http://www.thebestcsharpprogrammerintheworld.com/blogs/WPF-DataGrid-Navigation-Paging-Up-Down-Sideways-is-slow-virtuaization.aspx Apr 1, 2011 WPF Knowing which data type to use in different situations is generally a basic level decision. I mean you do not need to think very hard about storing regular numbers or storing words. I hope you don't believe that. Actually, choosing the correct data type to store your data can have serious implication on memory, storage, percision and access. So spend some time learning and studying the different data types and try to imagine which situations you would use a http://www.thebestcsharpprogrammerintheworld.com/blogs/Var-vs-Object-data-type.aspx http://www.thebestcsharpprogrammerintheworld.com/blogs/Var-vs-Object-data-type.aspx Mar 11, 2011 C# Catching exceptions within your code make a huge difference in how your program will be percieved from a user. If you do not catch the exception then in many cases your program will crash and be required to close and then reopened. However, if you catch exceptions you can handle them gracefully. You gracefully recover from an exception by notifying the user that an error has occured, provide them details so they can http://www.thebestcsharpprogrammerintheworld.com/blogs/Throwing-and-catching-excpetions-using-try-catch.aspx http://www.thebestcsharpprogrammerintheworld.com/blogs/Throwing-and-catching-excpetions-using-try-catch.aspx Mar 10, 2011 C# If you have ever wanted to take some action when a user changes a selection in a combobox (drop down selection list) you would put your code in the SelectionChanged event of the WinForm or WPF system. If you have ever wanted to set the combox to a default value when the window is being created, then you have probably experienced what this article is about. When you set the combobox http://www.thebestcsharpprogrammerintheworld.com/blogs/How-to-stop-selection-change-event-in-combox-from-firing-when-populating-loading-it.aspx http://www.thebestcsharpprogrammerintheworld.com/blogs/How-to-stop-selection-change-event-in-combox-from-firing-when-populating-loading-it.aspx Mar 9, 2011 C# Display the results. To view the results we need to loop through the ScoreDoc array we created in Part3. We do this by iterating through it within a for http://www.thebestcsharpprogrammerintheworld.com/blogs/How-to-create-and-search-a-Lucene-Net-index-in-4-simple-steps-using-c-sharp-Step-4.aspx http://www.thebestcsharpprogrammerintheworld.com/blogs/How-to-create-and-search-a-Lucene-Net-index-in-4-simple-steps-using-c-sharp-Step-4.aspx Mar 6, 2011 Lucene.Net In this step we will use the query which was created using the query parser to perform the search on the index we created in step 1. The Searcher class needs to be told where the index we want to search is. We will create a directory class to hold this information and http://www.thebestcsharpprogrammerintheworld.com/blogs/How-to-create-and-search-a-Lucene-Net-index-in-4-simple-steps-using-c-sharp-Step-3.aspx http://www.thebestcsharpprogrammerintheworld.com/blogs/How-to-create-and-search-a-Lucene-Net-index-in-4-simple-steps-using-c-sharp-Step-3.aspx Mar 6, 2011 Lucene.Net There are numerous ways you can build your query. I counted 17 different Query classes in the Lucene.Net source code. Here is a list of some of the query classes and when to use http://www.thebestcsharpprogrammerintheworld.com/blogs/How-to-create-and-search-a-Lucene-Net-index-in-4-simple-steps-using-c-sharp-Step-2.aspx http://www.thebestcsharpprogrammerintheworld.com/blogs/How-to-create-and-search-a-Lucene-Net-index-in-4-simple-steps-using-c-sharp-Step-2.aspx Mar 5, 2011 Lucene.Net Before we get started I wanted to mention that Lucene.Net was originally designed for Java. Because of this I think the creators used some classes in Lucene that already exist in the .Net framework. Therefore, we need to use the entire path to the classes and methods instead of using http://www.thebestcsharpprogrammerintheworld.com/blogs/How-to-create-and-search-a-Lucene-Net-index-in-4-simple-steps-using-c-sharp-Step-1.aspx http://www.thebestcsharpprogrammerintheworld.com/blogs/How-to-create-and-search-a-Lucene-Net-index-in-4-simple-steps-using-c-sharp-Step-1.aspx Mar 4, 2011 Lucene.Net I am finding that as you learn to use and implement more syphistocated programming techniques the eaiser it becomes to created what many would call "complex algorithms". I beleive this, just think about what alternative you have to a Dictionary. I mean other than the similiar methods found in the System.Collections or http://www.thebestcsharpprogrammerintheworld.com/fundamentals/Dictionary-in-C-sharp.aspx http://www.thebestcsharpprogrammerintheworld.com/fundamentals/Dictionary-in-C-sharp.aspx Mar 2, 2011 C# I had a requirement where I received a generic list from a method and needed to iterate through the the list and change a value if certain criteria were met. Initially, I decided to use a foreach statement. However that resulted in a Can't modify members because it http://www.thebestcsharpprogrammerintheworld.com/blogs/Cant-modify-members-because-it-is-a-foreach-iteration-variable-use-for-loop.aspx http://www.thebestcsharpprogrammerintheworld.com/blogs/Cant-modify-members-because-it-is-a-foreach-iteration-variable-use-for-loop.aspx Mar 1, 2011 WPF I was implemting some paging functionality in a system I was building and realized that I had created the same forward, backward, first and last buttons and logic 3 times. After doing this I http://www.thebestcsharpprogrammerintheworld.com/blogs/Call-a-parent-method-from-UserControl-using-WPF.aspx http://www.thebestcsharpprogrammerintheworld.com/blogs/Call-a-parent-method-from-UserControl-using-WPF.aspx Feb 26, 2011 WPF I recently started a project working with Lucene.Net. I am amazed at how simple it was to create and search indexes. I downloaded the source by pointing my TortoiseSVN (subversion) here http://www.thebestcsharpprogrammerintheworld.com/blogs/Getting-started-with-Lucene-Net-292.aspx http://www.thebestcsharpprogrammerintheworld.com/blogs/Getting-started-with-Lucene-Net-292.aspx Feb 12, 2011 WPF It's pretty easy to populate and read from a ComboBox when the selected item is the same as the selected value. I.e. just simply http://www.thebestcsharpprogrammerintheworld.com/blogs/Add-Key-Value-Pairs-to-a-Combobox-using-WPF.aspx http://www.thebestcsharpprogrammerintheworld.com/blogs/Add-Key-Value-Pairs-to-a-Combobox-using-WPF.aspx Feb 12, 2011 WPF Here is an example of a conversion from a Silverlight project that reads data and loads it to a DataGrid to a WPF project. Please read my http://www.thebestcsharpprogrammerintheworld.com/blogs/Convert-Silverlight-to-WPF-and-WPF-DataGrid.aspx http://www.thebestcsharpprogrammerintheworld.com/blogs/Convert-Silverlight-to-WPF-and-WPF-DataGrid.aspx Feb 010, 2011 WPF Knowing the type of variable you are working with in C# and while programming in general is pretty important. You can't add a double and an integer together and get an intger, without converting it. If you attempt to do this the compiler will throw an exception and you http://www.thebestcsharpprogrammerintheworld.com/blogs/Dynamic-Type-in-comparison-to-var-Type.aspx http://www.thebestcsharpprogrammerintheworld.com/blogs/Dynamic-Type-in-comparison-to-var-Type.aspx Feb 07, 2011 WPF I was doing some code that checks the number of network round trips to the database within a single transaction. I was coding it using WPF in C#. What I wanted to http://www.thebestcsharpprogrammerintheworld.com/blogs/How-to-change-an-image-in-WPF-at-runtime.aspx http://www.thebestcsharpprogrammerintheworld.com/blogs/How-to-change-an-image-in-WPF-at-runtime.aspx Feb 05, 2011 WPF These days when you are designing a GUI (Graphical User Interface) one of the many topics to discuss is that of localization. Simply, localization means that local date format, currency and http://www.thebestcsharpprogrammerintheworld.com/blogs/Localizing-a-WPF-program-using-CSharp.aspx http://www.thebestcsharpprogrammerintheworld.com/blogs/Localizing-a-WPF-program-using-CSharp.aspx Feb 01, 2011 WPF A well designed program will support all the culture specific attributes dynamically. The 3 ASP.Net pages below are a single ASPX page that uses different resource files to change the Labels and the Button text http://www.thebestcsharpprogrammerintheworld.com/blogs/Localizing-an-ASP-Net-program-using-Csharp.aspx http://www.thebestcsharpprogrammerintheworld.com/blogs/Localizing-an-ASP-Net-program-using-Csharp.aspx Feb 01, 2011 ASP.NET In Lesson 12 you will learn to: Localize a WPF application using resource files, XAML and C#. Localize an ASP.NET application using resource files. http://www.youtube.com/watch?v=5MuN6VOw9r4 http://www.youtube.com/watch?v=5MuN6VOw9r4 Feb 01, 2011 Video In Lesson 11 you will learn to: Add a SubGrid to the View and populate it with a method from a Controller using HQL and ICriteria. Upgrade to NHibernate version 3.0 Beta and change and HQL query to LINQ to NHibernate. http://www.youtube.com/watch?v=RDpm9qK35R4 http://www.youtube.com/watch?v=RDpm9qK35R4 Dec 03, 2010, 01:06 PM Video I wrote a WPF program recently that contained 2 treeviews which were dynamiclly created, in part, by data located on a database. Initially, I had the creation of the treeviews in my Windows_Loaded method, executing the build one after the other. The performance http://www.thebestcsharpprogrammerintheworld.com/blogs/Action-Delegate-and-Task-Parallelism.aspx http://www.thebestcsharpprogrammerintheworld.com/blogs/Action-Delegate-and-Task-Parallelism.aspx Fri, 21 Jan 2011 16:45:00 +0000 C# The most common .Net languages are Visual Basic, C++ and C#. However, there are numerous other progamming languages that will function with the .Net Framework. Like, F#, J#, PowerBuilder, IronPython, http://www.thebestcsharpprogrammerintheworld.com/fundamentals/Language-Independence.aspx http://www.thebestcsharpprogrammerintheworld.com/fundamentals/Language-Independence.aspx Fri, 21 Jan 2011 16:45:00 +0000 C# There a numerous reasons why you would need to create an XML file. Configuration settings or using it as a data source are 2 examples. In both cases, you would need to create the XML file. If you have never done it before then the first question is http://www.thebestcsharpprogrammerintheworld.com/blogs/LINQ-to-XML-vs-XML-DOM-XMLDOM-and-LINQ-to-XML-with-Lambda-Expression.aspx http://www.thebestcsharpprogrammerintheworld.com/blogs/LINQ-to-XML-vs-XML-DOM-XMLDOM-and-LINQ-to-XML-with-Lambda-Expression.aspx Wed, 19 Jan 2011 16:45:00 +0000 C# - XML Programming has been around for some time and we haven't always had the .Net Framework to make our lives as programmers and support engineers so easy. When we program within the confines of http://www.thebestcsharpprogrammerintheworld.com/fundamentals/Interoperability.aspx http://www.thebestcsharpprogrammerintheworld.com/fundamentals/Interoperability.aspx Sun, 16 Jan 2011 16:45:00 +0000 C# I had built a very nice program that used reflection where I had gone against the suggestion not to depend on the order or results from methods. It was working fine for quit some time. It stopped http://www.thebestcsharpprogrammerintheworld.com/blogs/Order-by-with-LINQ-to-Reflection-using-MetadataToken-and-Lambda.aspx http://www.thebestcsharpprogrammerintheworld.com/blogs/Order-by-with-LINQ-to-Reflection-using-MetadataToken-and-Lambda.aspx Wed, 12 Jan 2011 16:45:00 +0000 LINQ I think Lambda expression are cool. Not only are cool, they are pretty powerful and can make your code a lot more readable and compact. I wrote this article here about http://www.thebestcsharpprogrammerintheworld.com/blogs/Using-LINQ-to-Reflection-with-Lambda-Expressions.aspx http://www.thebestcsharpprogrammerintheworld.com/blogs/Using-LINQ-to-Reflection-with-Lambda-Expressions.aspx Mon, 10 Jan 2011 16:45:00 +0000 LINQ I created a nice utility in WPF today which contained a treeview, textbox, button and datagrid. The logic and work flow executed as expected, I was very proud of the work. I caught all http://www.thebestcsharpprogrammerintheworld.com/blogs/Resize-WPF-contents-controls-when-window-is-resized.aspx http://www.thebestcsharpprogrammerintheworld.com/blogs/Resize-WPF-contents-controls-when-window-is-resized.aspx Thu, 06 Jan 2011 16:45:00 +0000 WPF It's kind of funny, you search and you search for the answer or keyword for achieving the resizing of controls within a WPF window at runtime but just can't seem to get there easily. However, as soon as http://www.thebestcsharpprogrammerintheworld.com/blogs/Resize-a-control-within-a-WPF-window-grid-at-runtime.aspx http://www.thebestcsharpprogrammerintheworld.com/blogs/Resize-a-control-within-a-WPF-window-grid-at-runtime.aspx Mon, 03 Jan 2011 21:00:00 +0000 WPF