Csharp Code Samples

Nhibernate Parent Child Relations

Rohan Warang — Sat, 01 Aug 2009 14:49:10 +0000

For almost every Nhibernate beginner the most challenging thing to do is implement a parent child or one to many relation. There are many articles about this on the net some very basic and some highly detailed. But most samples available do not run when you download them giving all sorts of Nhibernate errors, which [...]

Update Panels and JSON Alternatives

Rohan Warang — Sun, 31 May 2009 19:24:16 +0000

In most asp.net applications users experience post backs as a result of submit action by the client browsers. These post backs can be quite annoying when just a small part of the page needs to be refreshed. Update panels are designed to perform partial post back eliminating the need for doing a complete post back [...]

Preventing SQL Injection Using Linq

Rohan Warang — Sun, 10 May 2009 11:14:24 +0000

SQL injection is one of the most common hacking methods for websites where authentication is required for accessing the website content. In this article we try to verify if linq based data access layers are truly immune to SQL injection. SQL Injection To give a brief about SQL injection to those who are unaware of [...]

Configuring WCF Throttling Behaviors

Rohan Warang — Mon, 27 Apr 2009 12:37:41 +0000

Most WCF services hosted in a live environment if not configured for handling heavy simultaneous requests give a Denial of Service Error, better known as DoS attacks. To prevent these from happening we have to configure the throttling behavior and some attributes of the ServiceHost. In this article we try to understand and configure each [...]

Efficient Server Side Paging Alternatives

Rohan Warang — Mon, 20 Apr 2009 18:25:38 +0000

Every one of us has used paging in our projects to display tabular data in DataGrids or GridViews or in the more recent and more flexible ListViews. The problem we often face is when the data is less the paging works fine, but as the data starts to increase the page load times start increasing. [...]

Thread Synchronization: Ensuring Atomic Operations

Rohan Warang — Tue, 07 Apr 2009 12:47:06 +0000

An atomic operation in computer science refers to a set of operations that can be combined so that they appear to the rest of the system to be a single operation with only two possible outcomes: success or failure (Wikipedia). In a threaded application certain variables or objects may be shared by multiple threads. If [...]

Thread Synchronization: Avoiding Race Conditions

Rohan Warang — Sun, 05 Apr 2009 13:02:46 +0000

Race conditions occur when two or more threads try to gain control of the same object. In a threaded application multiple instances of threads run concurrently. These threads may share some variables such as counters or some other global objects. There is every chance that multiple threads simultaneously try to write values to the same [...]

Asp.net Permalinks Using URL Rewriting

Rohan Warang — Wed, 25 Mar 2009 12:10:58 +0000

A Permalink is a permanent link which points to a particular blog entry or forum entry. For example the permalink for this blog article is http://csharp-codesamples.com/2009/03/aspnet-permalinks-using-url-rewriting. This does not mean that a physical page is created for each blog entry. Instead a single page shows the data for multiple blogs articles dynamically based on some [...]

The Using Block

Rohan Warang — Sat, 21 Mar 2009 12:40:11 +0000

The using block provides proper declaration and dispose of objects that implement IDisposable interface. IDisposable is implemented by managed classes that access unmanaged resources. FileStream is one such classes that accesses IntPtr and SafeFileHandle which are unmanaged handles. Finally Block The problem with unmanaged resources is that they can throw exceptions which are beyond the [...]

Linq Filters On Lists

Rohan Warang — Thu, 19 Mar 2009 04:51:56 +0000

Microsoft .net framework 3.5 introduced the Language Integrated Query (Linq) feature. Linq provides a set of query operators to filter, join and perform other such data related operations on various types datasources such as lists, dictionaries, datasets etc. In this article we perform a simple filter operation on a collection of data stored in a [...]