如何在asp.net $ C $得到HiddenField值c-背后 [英] How to get HiddenField value in asp.net code-behind
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问题描述
如何获得HiddenField值asp.net code-背后?在此先感谢!
公共部分类ReadCard:System.Web.UI.Page
{
保护无效的Page_Load(对象发件人,EventArgs的发送)
{
Response.Cache.SetCacheability(System.Web.HttpCacheability.NoCache); } 保护无效的button1_Click(对象发件人,EventArgs的发送)
{
this.ClientScript.RegisterStartupScript(this.GetType(),了MyClick,&所述;脚本> ReadCard();&下; /脚本>中);
字符串B = HiddenField1.Value; //如何获取值123?
}
}
ASPX:
< HTML的xmlns =http://www.w3.org/1999/xhtml>
<头=服务器>
<标题>< /标题>
< META HTTP-EQUIV =过期的内容=0/>
< META HTTP-EQUIV =缓存控制内容=无缓存/>
< META HTTP-EQUIV =编译内容=无缓存/>
<脚本SRC =jQuery的-1.5.2.min.js类型=文/ JavaScript的>< / SCRIPT>
<脚本类型=文/ JavaScript的>
功能ReadCard(){
$(#HiddenField1)VAL(123)。
}
< / SCRIPT>
< /头>
<身体GT;
<表ID =form1的=服务器>
< ASP:HiddenField ID =HiddenField1=服务器/>
< ASP:按钮的ID =Button1的=服务器文本=按钮的onclick =的button1_Click/>
< /表及GT;
< /身体GT;
< / HTML>
解决方案
客户端ID不一定是相同的服务器ID(除非你使用 CliendIDMode =静态
,您可以将一台服务器标签获取客户端ID。
还请注意,你必须把脚本中的的document.ready
标签里面,或者把脚本在页面的底部 - 否则脚本将不会发现HiddenField1,因为它不会被加载到DOM中还
$(文件)。就绪(函数(){
$(&下;%= HiddenField1.ClientID%gt;中)。VAL(123);
});
How to get HiddenField value in asp.net code-behind? Thanks in advance!
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>
解决方案
The client ID isn't necessarily the same as the server ID (unless you're using CliendIDMode=Static
. You can insert a server tag to get the client ID.
Note also that you have to put the script inside a document.ready
tag, or put the script at the bottom of the page -- otherwise the script won't find HiddenField1, as it will not have been loaded into the DOM yet.
$(document).ready(function() {
$("<%= HiddenField1.ClientID %>").val("123");
});
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