<%@ Page Language="C#" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><script runat="server">
protected void Button2_Click(object sender, EventArgs e)
{
Label1.Text = HiddenField1.Value + TextBox1.Text + aaa.InnerHtml;
}</script><html xmlns="http://www.w3.org/1999/xhtml" ><head runat="server"> <title>无标题页</title><script language="javascript" type="text/javascript">// <!CDATA[function aa() {document.getElementById("HiddenField1").value="a";document.getElementById("TextBox1").value="b";document.getElementById("aaa").innerHTML="c";
}// ]]></script></head><body> <form id="form1" runat="server"> <input id="Hidden1" type="hidden" /> <asp:HiddenField ID="HiddenField1" runat="server" /> <asp:TextBox ID="TextBox1" runat="server"></asp:TextBox> <div id="aaa" runat="server"></div> <br /> <input id="Button1" type="button" value="button" onclick="aa()" /> <asp:Label ID="Label1" runat="server" Text="Label"></asp:Label> <asp:Button ID="Button2" runat="server" OnClick="Button2_Click" Text="Button" /> </form></body></html>这样的使用方法在控件中非常常用,AjaxControlToolkit的基类ExtenderControlBase也使用了这样了方法,其提供了ClientState属性可以获取隐藏域的值.方便了前台和后台的交互