The CTP of Enterprise Library 3.0 was released last Friday.One of the new application blocks it contains is a Validation Application Block for validating classes in your applications.David Hayden wrote 4 tutorials on how to use it:

• Validation Application Block in Enterprise Library 3.0 - Using Validation Facade Class - Part I
• Validation Application Block in Enterprise Library 3.0 - ValidationFactory Class - Part II
• Validation Application Block Ruleset in Enterprise Library 3.0 - Enterprise Library 3.0 Tutorials - Part III
• Validation Application Block - Rules in External XML Configuration File - App.Config Web.Config - Enterprise Library 3.0 - Part IV

Technorati tags: validation, dotnet, c#, tutorial

This article explains how to manage database of ASP.NET 2.0 Membership & Role services in non-ASP.NET context.

Technorati tags: database, dotnet, asp.net

Written in C#, WatiN emulates the relevant portions of browser behavior, including form submission, JavaScript,cookies and automatic page redirection, and allows C# test code to examine returned pages either as containers of forms, tables, and links. When combined with a framework such as NUnit, it is fairly easy to write tests that very quickly verify the functioning of a web site.

This tutorial explains some basics to get you up and running automating Internet Explorer with WatiN.

Technorati tags: nunit, web, testing, TDD, dotnet

Internet Explorer 7 introduces a unified approach to RSS. The good thing about it, is its availability for developers to consume the RSS feeds of the end-user, for example to build a custom RSS aggregator. Programs like the Windows Sidebar in Vista, the Windows Live Mail Desktop client, Outlook 2007 leverage the power of this API to provide multiple views on the same RSS information. In this series of blog posts Bart De Smet is showing you little snippets to make a jumpstart with the RSS platform.

[Via Tom's MSDN Belux Corner]

Technorati tags: rss, c#, dotnet, windows

I will use the following XML document in the example below.

<?xml version="1.0" encoding="utf-8" ?>

<users>

  <user FirstName="Tom" LastName="Adams" Age="23" />

  <user FirstName="Jhon" LastName="Brams" Age="17" />

  <user FirstName="Bill" LastName="Smith" Age="33" />

</users>

The code prints out all the user nodes of the users node that  have an age with a value greater than 17.

// Read the xml from resource file 

string xml = Resources.Users; 

using (StringReader sr = new StringReader(xml)) 

{ 

    XPathDocument document = new XPathDocument(sr); 

    XPathNavigator navigator = document.CreateNavigator(); 

    XmlNamespaceManager ns = new XmlNamespaceManager(navigator.NameTable); 

    //Selects all the user nodes of the users node that 

    // have an age with a value greater than 17  

    XPathNodeIterator it = navigator.Select("/users/user[@Age>17]"); 

    while (it.MoveNext()) 

    { 

        // access the atributes  

        string firstName = it.Current.GetAttribute("FirstName", ns.DefaultNamespace); 

        string lastName = it.Current.GetAttribute("LastName", ns.DefaultNamespace); 

        // Print out  

        Console.WriteLine( "{0} {1}", firstName, lastName ); 

    } 

}