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Sunday, 5 April 2020

Pass Value From Code Behind To JavaScript Function In Asp.Net

4/05/2020 - By Pranav Singh 0


This article will show you how to pass value from code behind to aspx page. In this I will show you method in which you can pass the value from code behind to .aspx page and how you can access it inside a javaScript method.

Do in our .aspx page first we will take an hidden field control as show below.


<body>
    <form id="form1" runat="server">
    <div>
        <asp:HiddenField ID="HiddenField1" runat="server" />
    </div>
    </form>
</body>

Now go to your code behind and assign the value to the hidden field.

protected void Page_Load(object sender, EventArgs e)
        {
            HiddenField1.Value = "This value is from code behind.";
        }

Now in you code behind write the below code.

<script>
        function AcccessCodeBehindValue() {
            var data = document.getElementById('<%=HiddenField1.ClientID%>').value;
                alert(data);
            }
    </script>

After writing the above code just call the code to execute.

<script>
            AcccessCodeBehindValue();
        </script>

Here is your complete code of .aspx.cs file.

<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="WebForm1.aspx.cs" Inherits="WebApplication2.WebForm1" %>

<!DOCTYPE html>

<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title></title>
    <script>
        function AcccessCodeBehindValue() {
            var data = document.getElementById('<%=HiddenField1.ClientID%>').value;
                alert(data);
            }
    </script>
</head>
<body>
    <form id="form1" runat="server">
        <div>
            <asp:HiddenField ID="HiddenField1" runat="server" />
        </div>
        <script>
            AcccessCodeBehindValue();
        </script>
    </form>
</body>
</html>


Now run the page to check the output.



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