ASP.NET defines an application as the sum of all files, pages, handlers, modules, and executable code that can be invoked or run in the scope of a given virtual directory (and its subdirectories) on a Web application server. For example, an "order" application might be published in the "/order" virtual directory on a Web server computer. For IIS the virtual directory can be set up in the Internet Services Manager; it contains all subdirectories, unless the subdirectories are virtual directories themselves.
Each ASP.NET Framework application on a Web server is executed within a unique .NET Framework application domain, which guarantees class isolation (no versioning or naming conflicts), security sandboxing (preventing access to certain machine or network resources), and static variable isolation.
ASP.NET maintains a pool of HttpApplication instances over the course of a Web application's lifetime. ASP.NET automatically assigns one of these instances to process each incoming HTTP request that is received by the application. The particular HttpApplication instance assigned is responsible for managing the entire lifetime of the request and is reused only after the request has been completed. This means that user code within the HttpApplication does not need to be reentrant.
发表于 @ 2009年09月23日 14:25:00 | 评论( 0 ) | 编辑| 举报| 收藏
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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 ......
在web开发中经常会碰到css样式的运用，我就在asp.net中运用样式进行了总结！
1、使用style属性设置样式
•
n实例
•Style属性设置
<asp:TextBox ID="TextBox1" runat="server"
style="background-color:Red; font-size:15px">
</asp:TextBox>
2、使用Cssclass属性设置 ......
