你可以使用UniqueID属性找到任何控件:

Label label = (Label)Page.FindControl("UserControl1$Label1");

我曾经开发过一个asp.net应用程序，它通过了一家领先的安全公司的安全审计，我学会了这个简单的技巧来防止一个不太为人所知但很重要的安全漏洞。

以下解释来自: http://www.guidanceshare.com/wiki/ASP.NET_2.0_Security_Guidelines_-_Parameter_Manipulation#Consider_Using_Page.ViewStateUserKey_to_Counter_One-Click_Attacks

考虑使用Page。ViewStateUserKey用于对抗一键式攻击。如果您对调用者进行身份验证并使用ViewState，请设置Page。Page_Init事件处理程序中的ViewStateUserKey属性，以防止一键式攻击。

void Page_Init (object sender, EventArgs e) {
  ViewStateUserKey = Session.SessionID;
}

将属性设置为您知道对每个用户都是唯一的值，例如会话ID、用户名或用户标识符。

A one-click attack occurs when an attacker creates a Web page (.htm or .aspx) that contains a hidden form field named __VIEWSTATE that is already filled with ViewState data. The ViewState can be generated from a page that the attacker had previously created, such as a shopping cart page with 100 items. The attacker lures an unsuspecting user into browsing to the page, and then the attacker causes the page to be sent to the server where the ViewState is valid. The server has no way of knowing that the ViewState originated from the attacker. ViewState validation and HMACs do not counter this attack because the ViewState is valid and the page is executed under the security context of the user.

通过设置ViewStateUserKey属性，当攻击者浏览到一个页面以创建ViewState时，该属性将初始化为攻击者的名字。当合法用户向服务器提交页面时，将使用攻击者的名称对页面进行初始化。结果，ViewState HMAC检查失败并生成异常。

你知道可以用ASP。IIS或Visual Studio之外的网络?

整个运行时都打包好了，可以在任何想要尝试的进程中托管。使用ApplicationHost, HttpRuntime和HttpApplication类，你也可以打磨这些.aspx页面，并从中得到漂亮的HTML输出。

HostingClass host = ApplicationHost.CreateApplicationHost(typeof(HostingClass), 
                                            "/virtualpath", "physicalPath");
host.ProcessPage(urlToAspxFile); 

你的主持课程:

public class HostingClass : MarshalByRefObject
{
    public void ProcessPage(string url)
    {
        using (StreamWriter sw = new StreamWriter("C:\temp.html"))
        {
            SimpleWorkerRequest worker = new SimpleWorkerRequest(url, null, sw);
            HttpRuntime.ProcessRequest(worker);
        }
                    // Ta-dah!  C:\temp.html has some html for you.
    }
}

零售模式在机器。配置水平:

<configuration>
  <system.web>
    <deployment retail="true"/>
  </system.web>
</configuration>

覆盖网络。配置设置以强制调试为false，打开自定义错误并禁用跟踪。不再忘记在发布之前更改属性—只需将它们全部配置为开发或测试环境，并更新生产零售设置。

HttpContext。项作为请求级缓存工具

EnsureChildControls方法:它检查子控件是否被初始化。如果子控件未初始化，则调用CreateChildControls方法。