Calling a JavaScript function from c# code behind file

Calling JavaScript function from code behind ASP.NET:



In this post we describe how to call JavaScript function from code behind file. When we are working in web application then this required many a times.

JavaScript function from C# code behind ASP.NET:

Java Script Function:

Use this function in head tag on page.

function MyFunction() {
            alert('this is javascript function run by C# code.');
        }

Write this code in C# code page:

            Page.ClientScript.RegisterStartupScript(this.GetType(),
                "alert", "MyFunction();", true);

How to execute JavaScript Function From ASP.NET Code:

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="How_calljavascript_aspx_page.aspx.cs" Inherits="How_calljavascript_aspx_page" %>

<!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>Call JavaScript in asp.net page by C# on page load </title>
    <script type="text/javascript">
        function MyFunction() {
            alert('this is javascript function run by C# code.');
        }

    </script>
</head>

<body>
    <form id="form1" runat="server">
    <div>
   
    </div>
    </form>
</body>
</html>
  

c# - execute JavaScript from code behind in asp.net:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;

public partial class How_calljavascript_aspx_page : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
        if (!ClientScript.IsStartupScriptRegistered("alert"))
        {
            Page.ClientScript.RegisterStartupScript(this.GetType(),
                "alert", "MyFunction();", true);
        }
    }
}

Calling a JavaScript function from c# code behind file by parijat




We can also use Script Manager for execute JavaScript code behind the asp.net page.





Asp.net Related Other Post:







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