[object Object ] error in Sending and Receiving JSON objects to Web Service

Question

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Hi, I need to Send and Receive JSON objects to Web Service Methods using jQuery AJAX in ASP.Net
But when ever I am executing the below code, getting [object Object] error. Please help.

Html code:-

XML

<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title></title>
    <script language="javascript" type="text/javascript" src="http://code.jquery.com/jquery-latest.js"></script>

   <script type="text/javascript" src="Scripts/json2.js"></script>
    <script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.8.3/jquery.min.js"></script>
    <script type="text/javascript">
        function fnSentMail() {debugger;

            var userid = document.getElementById("txtuid").value;
            var txtpwd = document.getElementById("txtuid").value;


            $.ajax
    ({
        type: "POST",
        url: "Service/testservice.asmx/_testserv",
        data: "{'userid':'" + userid + "','password': '" + txtpwd  + "'}",
        contentType: "application/json; charset=utf-8",
        dataType: "json",
        success: function (msg) {debugger;
            alert(1);
        },
        error: function (ex) {
            alert(ex.toString());
        }
    });
        }
    </script>
</head>
<body>
    <form id="form1" runat="server">
    <div>

    <table>
    <tr>
    <td>User ID</td>
    <td>
        <asp:TextBox ID="txtuid" runat="server"></asp:TextBox></td>
    </tr>
    <tr>
    <td>Password</td>
    <td>
        <asp:TextBox ID="txtpwd" runat="server"></asp:TextBox></td>
    </tr>
    <tr>
    <td colspan="2">
        <asp:Button ID="btnLogin" runat="server" Text="Button" OnClientClick="return fnSentMail()"  />
    </td>
    </tr>
    </table>
    </div>
    </form>
</body>
</html>

testservice.asmx.cs:-

C#

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.Services;
using System.Web.Script.Services;
using System.IO;
using System.Collections.Specialized;
using System.Web.Configuration;
using System.Text;
using System.Data;
using System.Xml;
using System.Net;
using System.Collections;
using System.Configuration;
using System.Data.SqlClient;
using System.Globalization;

C#

public class testservice : System.Web.Services.WebService
   {
       [WebMethod(EnableSession = true)]
       [ScriptMethod(ResponseFormat = ResponseFormat.Json)]
       public string _testserv(string userid, string password)
       {
           return "Hello World";
       }

       //[WebMethod]
       //public string HelloWorld()
       //{
       //    return "Hello World";
       //}
   }

Posted 10-May-15 23:25pm

rupai99

Updated 10-May-15 23:26pm

v2

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F-ES Sitecore · Accepted Answer · 2015-05-10T23:50:00

Use the browser's dev tools (f12) or Fiddler to examine the network traffic as it will often reveal the actual error. You need to mark your webservice as a script service

C#

[System.Web.Script.Services.ScriptService]
public class testservice : System.Web.Services.WebService
{

    [WebMethod(EnableSession = true)]
    [ScriptMethod(ResponseFormat = ResponseFormat.Json)]
    public string _testserv(string userid, string password)
    {
        return "Hello World";
    }
}

$.ajax
({
    type: "POST",
    url: "testservice.asmx/_testserv",
    data: "{'userid':'" + userid + "','password': '" + txtpwd + "'}",
    contentType: "application/json; charset=utf-8",
    dataType: "json",
    success: function (msg) {
        alert(msg.d);
    },
    error: function (ex) {
        alert(ex.toString());
    }
});