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Editorial Team
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Asked: 2026-05-31T20:41:54+00:00

I found some other questions about this, but they didn’t work for me :(

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I found some other questions about this, but they didn’t work for me 🙁 So I’m posting my own question:

I’ve made an ASP.NET webservice in mono. The code for it is:

using System;
using System.Web;
using System.Web.Services;

namespace testWebservice
{
    public class ws : System.Web.Services.WebService
    {
        public ws() {

        }
        [WebMethod]
        public String sendCar()
        {
            return "44.435006,26.102314";
        }
    }
}

I’m trying to call this webservice from a website using jQuery:

function getCar()
{
    $.ajax( {
    type:'POST',
    url:'http://127.0.0.1:8080/ws.asmx/sendCar',
    contentType: "application/json; charset=utf-8",  
    data: "{}",
    dataType: "json",
    success:function(msg) {
      AjaxSucceeded(msg);  
    },  
    error: AjaxFailed
    })   
    function AjaxSucceeded(result) {   
              alert(result.d);   
          }  
    function AjaxFailed(result) {   
              alert(result.status + ' ' + result.statusText);   
          }         
}

When I run the page I get an alert saying “0 error”.
Cay anyone give me some advice please?

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1 Answer

  1. Editorial Team

    For the service to work you need to:

    Add to your project a reference to System.Web.Extension.

    Add a using System.Web.Script.Services; to your ws source.

    Add:

    [ScriptService]

    to your ws class.

    Add:

        <remove verb="*" path="*.asmx"/>
    <add verb="*" path="*.asmx" validate="false" type="System.Web.Script.Services.ScriptHandlerFactory, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35"/>

    inside your web.config under the <httpHandlers> tag.

    If you are calling getCar() from a button click add return false; after the method call so that the click will not cause a postback.

    For example:

    [Default.aspx]

    <%@ Page Language="C#" Inherits="testWebservice.Default" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html>
<head runat="server">
    <title>jQuery Web Service call from Mono using JSON</title>
    <script src="https://ajax.googleapis.com/ajax/libs/jquery/1.7.1/jquery.min.js"></script>
    <script type="text/javascript">
        function getCar()
        {
            $.ajax( {
            type:'POST',
            url:'http://127.0.0.1:8080/ws.asmx/sendCar',
            contentType: "application/json; charset=utf-8",  
            data: "{}",
            dataType: "json",
            success:function(msg) {
              AjaxSucceeded(msg);  
            },  
            error: AjaxFailed
            })   
            function AjaxSucceeded(result) {   
                      alert(result.d);   
                  }  
            function AjaxFailed(result) {   
                      alert(result.status + ' ' + result.statusText);   
                  } 
        }
    </script>
</head>
<body>
    <form id="form1" runat="server">
        <asp:Button runat="server" id="btnTest" Text="Call WebService" OnClientClick="getCar(); return false;" />
    </form>
</body>
</html>

    [ws.asmx.cs]

    using System;
using System.Web;
using System.Web.Script.Services;
using System.Web.Services;

namespace testWebservice
{
    [ScriptService]
    public class ws : System.Web.Services.WebService
    {
        public ws() {

        }
        [WebMethod]
        public String sendCar()
        {
            return "44.435006,26.102314";
        }
    }
}

    [web.config]

    <?xml version="1.0"?>
<!--
Web.config file for testWebservice.

The settings that can be used in this file are documented at 
http://www.mono-project.com/Config_system.web and 
http://msdn2.microsoft.com/en-us/library/b5ysx397.aspx
-->
<configuration>
  <system.web>
    <compilation defaultLanguage="C#" debug="true">
      <assemblies>
        <add assembly="System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" />
      </assemblies>
    </compilation>
    <customErrors mode="RemoteOnly">
    </customErrors>
    <authentication mode="None">
    </authentication>
    <authorization>
      <allow users="*" />
    </authorization>
    <httpHandlers>
        <remove verb="*" path="*.asmx"/>
        <add verb="*" path="*.asmx" validate="false" type="System.Web.Script.Services.ScriptHandlerFactory, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35"/>
    </httpHandlers>
    <trace enabled="false" localOnly="true" pageOutput="false" requestLimit="10" traceMode="SortByTime" />
    <sessionState mode="InProc" cookieless="false" timeout="20" />
    <globalization requestEncoding="utf-8" responseEncoding="utf-8" />
    <pages>
    </pages>
  </system.web>
</configuration>
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