实例一：
前台
- <%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="_Default" %>
- <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
- <html xmlns="http://www.w3.org/1999/xhtml" >
- <head runat="server">
- <title>无标题页</title>
- </head>
- <body>
- <form id="form1" runat="server">
- <div id="div1">
- <asp:Button ID="Button1" runat="server" Text="Button" OnClick="Button1_Click" />
- </div>
- </form>
- </body>
- </html>
后台
- public partial class _Default : System.Web.UI.Page
- {
- protected void Page_Load(object sender, EventArgs e)
- {
- }
- protected void Button1_Click(object sender, EventArgs e)
- {
- string name = "tree";
- //Server.Transfer("ajax.aspx?id=1&name="+name);
- ChangeControls();
- }
- /************Controls属性************
- * this.Controls则包括所有控件。
- * System.Web.UI.LiteralControl
- System.Web.UI.HtmlControls.HtmlHead
- System.Web.UI.LiteralControl
- System.Web.UI.HtmlControls.HtmlForm
- System.Web.UI.LiteralControl
- * 为<div id="div1">加上runat属性，则Form.Controls里则找不到Button1
- */
- private void ChangeControls()
- {
- foreach (System.Web.UI.Control control in this.Form.Controls)
- {
- if (control is Button)
- {
- Button btn = (Button)control;
- btn.Text = "Hello";
- }
- }
- foreach (Control control in this.Controls)
- {
- Response.Write(control.ToString() + "<br/>");
- }
- }
- }