如何在asp.net代码隐藏中获取HiddenField值？提前感谢！
public partial class ReadCard : System.Web.UI.Page
{
protected void Page_Load(object sender,EventArgs e)
{
Response.Cache.SetCacheability(System.Web.HttpCacheability.NoCache);
}
protected void Button1_Click(object sender,EventArgs e)
{
this.ClientScript.RegisterStartupScript(this.GetType(),"MyClick ","<script>ReadCard();</script> ");
string b= HiddenField1.Value; //How to get the value "123"??
}
}
ASPX：
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title></title>
<Meta http-equiv="expires" content="0"/>
<Meta http-equiv="cache-control" content="no-cache"/>
<Meta http-equiv="pragma" content="no-cache"/>
<script src="jquery-1.5.2.min.js" type="text/javascript"></script>
<script type="text/javascript">
function ReadCard() {
$("#HiddenField1").val("123");
}
</script>
</head>
<body>
<form id="form1" runat="server">
<asp:HiddenField ID="HiddenField1" runat="server" />
<asp:Button ID="Button1" runat="server" Text="Button" onclick="Button1_Click" />
</form>
</body>
</html>
