I have doubt regarding call .cs class file(C#) function from javascript My Code: I have class file(.cs) like call_cs_function_from_js

------------------------------------------------------------------


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

namespace call_cs_function_from_js
{
    public class cal_lcs_function_from_js
    {
        public void getdata()
        {

        }
    }
}

This is javascript code File:

<script type="text/javascript">
function call(){
  cal_lcs_function_from_js.getdata();  //This way is not working 
  alert('called');
}
</script>

Here I want call getdata of cal_lcs_function_from_js from call()(means .js). call() invoked when button click.

Please Show me what are the other ways.

I have doubt regarding call .cs class file(C#) function from javascript My Code: I have class file(.cs) like call_cs_function_from_js

------------------------------------------------------------------


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

namespace call_cs_function_from_js
{
    public class cal_lcs_function_from_js
    {
        public void getdata()
        {

        }
    }
}

This is javascript code File:

<script type="text/javascript">
function call(){
  cal_lcs_function_from_js.getdata();  //This way is not working 
  alert('called');
}
</script>

Here I want call getdata of cal_lcs_function_from_js from call()(means .js). call() invoked when button click.

Please Show me what are the other ways.

• c#
• javascript

• The code you've written wouldn't work in c# either. It's a method and as such you would need an instance of the class. – Rune FS Commented May 21, 2012 at 6:37
• Off-topic and extremely nitpicky: apart from the fact that you're ignoring all case-conventions, why's your function named getdata() when it doesn't return anything? – Thorsten Dittmar Commented May 21, 2012 at 6:41

2 Answers 2

You can not call your C# function directly from your javascript code. As javascript runs on client side and your C# function resides on the server. For that you have to create a Web Service, and call that service form your javascript using Ajax.

UPDATE:

1. First add the namespace using System.Web.Services; to your web page.

2. Add the following method to your page

   [WebMethod]
   public string GetData()
   {
       return ("");
   }
   

3. Call the method using Ajax.

   $.ajax({ type: "GET", url: "/GetData", success: function (data) { });

The only way that you can call a C# function using javascript is if you're running the C# function within an ASP.NET page. Then you would use an ajax call from the javascript to call the ASP.Net page and retrieve the results of your function.

http://api.jquery./jQuery.ajax/

function call(){
  $.ajax({
    url: "/cal_lcs_function_from_js"
  }).done(function() { 
    alert('called');
  });
}

where "/cal_lcs_function_from_js" is a page running in ASP on the same web server as the javascript file is being run from.