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js给C#控件赋值
 2011/7/1 8:47:20 评论:1人 阅读次数:22311

前台代码


<%@ 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>
    <script type="text/javascript">
    function fz(){
        var std = "2";
        alert(std);
        document.getElementById('HiddenField1').value=std;
    }
    </script>
</head>
<body>
    <form id="form1" runat="server">
    <div>
    项目中有个小功能,在Js中修改一个服务器标签的值,如 document.getElementById("lblClothIndex").innerHTML = result;(比如由“1”修改成“2”),可是在后台通过this.lblClothIndex.Text获得的还是"1"这个老值。后来发现通过调用隐藏控件的方法可以获得最新值,代码如下:

        1. 添加一个隐藏控件  <asp:HiddenField ID="HiddenField1" runat="server" Value="" />
        
        <asp:TextBox ID="TextBox1" runat="server">0</asp:TextBox>
            <a href="#" onclick="fz()">赋值</a>

        <asp:Button ID="Button1" runat="server" onclick="Button1_Click" Text="Button" />
 2. 用JS为服务器标签赋值的时候也给隐藏控件赋值 
        3. 在后台通过 this.HiddenField1.Value代码获得最新值

    </div>
    </form>
</body>
</html>

 

后台代码


using System;
using System.Collections;
using System.Configuration;
using System.Data;
using System.Linq;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Xml.Linq;

public partial class _Default : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
        
    }
    protected void Button1_Click(object sender, EventArgs e)
    {
        TextBox1.Text = HiddenField1.Value;

    }
}

(完)

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