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asp.net Page.Controls对象(找到所有服务器控件)

2008-11-20 00:00 639 查看

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/>"); 
} 
} 
}

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