Passing values from javascript to code behind in ASP.NET

bysantosh •
0 
 
This article, I will show you how to pass values from client side means javascript from code behind i.e
 C# with complet example and source code
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 <%@ Page Language="C#" AutoEventWireup="true"
CodeFile="PassFromClientToServer.aspx.cs"
   Inherits="PassFromClientToServer" %>

<!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>Untitled Page</title>

   <script type="text/javascript">
  function Pass()
  {
       var hidden = document.getElementById("ContentType");
       hidden.value = "test value from client side";
       var frm = document.getElementById("form1");
       frm.submit();
  }
   </script>

</head>
<body>
   <form id="form1" runat="server">
       <div>
           <input type="hidden" id="ContentType" name="ContentType" />
           <asp:TextBox ID="txt1" runat="Server"></asp:TextBox>
           <asp:Button ID="btnClick" runat="server" Text="Test"
OnClientClick="Pass();" />
       </div>
   </form>
</body>
</html>

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

public partial class PassFromClientToServer : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
        if (Request.Form["ContentType"] != null)
        {
            string myHiddenFiledValue = Request.Form["ContentType"].ToString();
            txt1.Text = myHiddenFiledValue.ToString();
        }

    }
   
}
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