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How to call ASMX from Javascript

Posted By:      Posted Date: August 27, 2010    Points: 0   Category :ASP.Net
 

I am very new to web services so this may be a very silly question: how do you call an ASMX web-service sychronously, so that the web-page doesn't finish loading until the web service has sent its response?  I need my Javascript calling function to sit tight until the web-service returns its response; at the moment, it continues execution without waiting.

I have a web service defined in an ASMX file:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Services;
using System.Data.SqlClient;
using System.Configuration;

/// <summary>
/// Summary description for MyService
/// </summary>
[WebService(Namespace = "http://www.myservice.com/")]
[WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1_1)]
// To allow this Web Service to be called from script, using ASP.NET AJAX, uncomment the following line. 
[System.Web.Script.Services.ScriptService]
public class MyService: WebService 
{
    public MyService() 
    {

        //Uncomment the following line if using designed components 
        //InitializeComponent(); 
    }

    [WebMethod]
    public string ValidateInfo (string arg 1, string arg2)
    {
        ...
        return response;
    }
}


In my ASPX file I have a reference to my web service:

                                     
                                            
                                        

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