ASP.NET 2.0比以前版本的一个较大的改进，就是提供了母版页 。那么它与内容页之间是怎么通讯的呢，可以参照如下事例，就能够实现其功能(代码很简单，就不加注释了 源代码下载)：

using System;
using System.Data;
using System.Configuration;
using System.Collections;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;

//Master页面
public partial class MasterPage : System.Web.UI.MasterPage
...{
    protected void Page_Load(object sender, EventArgs e)
    ...{

    }
    protected void btnMaster_Click(object sender, EventArgs e)
    ...{
        Label lbl = this.ContentPlaceHolder1.FindControl("lblContent") as Label;
        Response.Write("");
    }
}