What is ASP.NET
ASP.NET is a unified Web development model that includes the services necessary for you to build enterprise-class Web applications with a minimum of coding. ASP.NET is part of the .NET Framework, and when coding ASP.NET applications you have access to classes in the .NET Framework. You can code your applications in any language compatible with the common language runtime (CLR), including Microsoft Visual Basic, C#, JScript .NET, and J#. These languages enable you to develop ASP.NET applications that benefit from the common language runtime, type safety, inheritance, and so on.
ASP.NET includes:
A page and controls framework
The ASP.NET compiler
Security infrastructure
State-management facilities
Application configuration
Health monitoring and performance features
Debugging support
An XML Web services framework
Extensible hosting environment and application life cycle management
An extensible designer environment
本文来自CSDN博客，转载请标明出处：http://blog.csdn.net/chimomo/archive/2009/09/04/4519542.aspx
在ASP.NET网站中网站管理后台需要经常验证用户身份,要实现这种功能就可以利用那个继承机制和ASP.NET的事件机制.首先定义一个需要进行身份验证的BasePage类,继承自Page类,在BasePage类的构造函数中定义它的加载事件的处理代码,这样所有继承自BasePage类的页面都能自动执行身份验证：
/// <summary>
/// 验� ......
假定有一个Product表，字段有（Id,Name,Quantity,...）将Quantity列用textbox格式来显示：
首先在Gridview中，Quantity列以TemplateField显示，其他的列属性设为只读，把显示格式设为TextBox
<asp:TemplateField HeaderText="Quantity">
<ItemTemplate>
&nbs ......
默认情况下，匿名用户不能修改profile属性，问题在于ASP.NET Framewor没有办法关联Profile数据和特定的用户，除非用户是经过身份验证的。
如果希望匿名用户修改profile的属性，必须启用ASP.NET Framework的匿名认证（Anonymous Identification）的功能。当开启这个功能时，一个标识（一个GUID）被分配给匿名用户，并 ......
