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One of the new controls available with ASP.NET 4 is the QueryExtender control. The QueryExtender is designed to simplify filtering data returned from a LinqDataSource or EntityDataSource by decoupling the filtering logic from the data source control. Using the QueryExtender is easy - simply add a QueryExtender to the page, specify what data source control it applies to, and then define the filtering criteria. For example, when displaying product information on a web page you could use the QueryExtender control and a few lines of markup to display only those products that are not within a certain price range and whose name or category starts with a user-specified search string.

Filtering the data returned by a LinqDataSource or EntityDataSource control is certainly possible without the QueryExtender; both the LinqDataSource and EntityDataSource controls have a Where property that can be used to specify filtering criteria. What the QueryExtender offers is a simpler means by which to filter data. This article includes a number of demos (which can be downloaded at the end of this article) that showcase the QueryExtender's ease of use and its powerful filtering capabilities.

ADO.NET supports many ways to manage memory-resident data returned in a DataSet. This example demonstrates how to use the additional functionality exposed by ADO.NET to sort and filter data.

This short introduction to.NET shows Access and SQL Server developers how to use a development tool to create connections to data and a user interface to manipulate that data.

The purpose of this article is demonstrate how to build a Windows Forms application that encrypts files through the use of the RijndaelManaged class, a symmetric algorithm, which is used to encrypt and decrypt data by using its automatically generated Key and IV. Encryption involves the creation of a cipher (an algorithm) that takes data and a generated key as its input. The algorithm will behave in accordance with the length of the key. A symmetric algorithm is one that uses the same key to both decrypt and encrypt the data file. In our case, we will use the RSACryptoServiceProvider, an asymmetric algorithm, to encrypt and decrypt the key to the data encrypted by RijndaelManaged…

Regardless of your .NET language of choice, managing data is a vital skill for most applications.

CODE Magazine, Issue 2012 Mar/Apr is now available!

In the last couple of years data has experienced a new Renaissance. We are no longer limited to the staid world of SQL, rows and columns. We now have document databases, columnar data stores, key value pair systems and many other new flavors of data. This issue provides some insight into two document databases (MongoDB and RavenDB) as well as new features in SQL Server 2012.

Learn how to use SQL Azure and the Sync Framework to move data between the corporate data center, various branches and individual devices.

This article explains how to implement on scroll loading data from server using JQuery as every one see on facebook.

Overview of the steps necessary to cache Pages or application data based on the new ASP.NET 2.0 SqlCacheDependency features.

JavaScript frameworks provide an alternative to plug-ins for rich web app front ends. We'll show you how to use the Ext JS library and ASP.NET MVC to quickly build a robust data-centric solution.