how to pass c# function return value as parameter to Javascript

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i have a javascript funtion JA which accepts a string parameter, and a c# function CB which accepts string parameter

e.g

//js
function JA(location)
{

}

//c#
public string calculate(string par)
{

//proccess and return string
}

now i want to call my javascript function i.e JA such that i pass the return value of c# as parameter to this javascript function

i.e
<script>
JA(calculate())
</Script>

Posted 6-Aug-14 20:20pm

Kannannns

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Kannannns 7-Aug-14 6:46am

$.ajax({
type: "POST",
url: "../loadmapstring.asmx/bindMapLocations",
data: "{s:sParam}", // passing the parameter
contentType: "application/json; charset=utf-8",
dataType: "json",
success: function(retValue) {
// Do something with the return value from.Net method
generateMarkersForSideBar(retValue);
}
});

i tried this but its not working

4 solutions

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Akhil Mittal · Answer 1 · 2014-08-07T00:33:00

Solution 4

make an ajax call
and if using web forms, then make the c# method as [WebMethod] before ajax call.

Posted 7-Aug-14 0:33am

Akhil Mittal

Comments

Kannannns 8-Aug-14 0:28am

$.ajax({
type: "POST",
url: "../loadmapstring.asmx/bindMapLocations",
data: "{s:sParam}", // passing the parameter
contentType: "application/json; charset=utf-8",
dataType: "json",
success: function(retValue) {
// Do something with the return value from.Net method
generateMarkersForSideBar(retValue);
}
});

i tried this but its not working

uddien · Answer 2 · 2014-08-06T20:40:00

Solution 3

You can using ajax jquery

JavaScript

function JA(location)
{
$.ajax({
            type: 'POST',
            url: "ControllerName/calculate",
            data: dataForPost,
            success: function (returnValue) {}
        });
 
}

http://www.w3schools.com/jquery/ajax_ajax.asp[^]

Posted 6-Aug-14 20:40pm

uddien

Santosh K. Tripathi · Answer 3 · 2014-08-06T20:38:00

Solution 2

Hi,
Use this line after getting result from your C# function

Page.ClientScript.RegisterStartupScript(this.Page.GetType(), "sScript", "<script language='javascript'>MyJSfunction( PassResultStringOfC#CodeAsParameter );</script>");

Posted 6-Aug-14 20:38pm

Santosh K. Tripathi

Akhil Mittal · Answer 4 · 2014-08-06T20:34:00

C#

public static void calculate(string par)
      {
          // Cleans the message to allow single quotation marks
          string cleanMessage = par.Replace("'", "\\'");
          string script = string.Format("<script type=\"text/javascript\">$(document).ready(function(){JA('{0}');});</script>", cleanMessage);

          // Gets the executing web page
          Page page = HttpContext.Current.CurrentHandler as Page;
          // Checks if the handler is a Page and that the script isn't allready on the Page
          if (page != null && !page.ClientScript.IsClientScriptBlockRegistered("JA"))
          {
              page.ClientScript.RegisterClientScriptBlock(typeof(<your class="" name="">), "JA", script);
          }
      }</your>