JSON ajax WebMethod Call

i'm trying to call my webservice for adding an entry into my database. the webmethod only takes 1 parameter, and doesn't return any data. i set a breakpoint on my webservice and it's not hitting it, nor is the alert showing up. all of the other alerts and validation is working on the javascript function, so i know it's the webservice call. i'm fairly new to webservices and JSON, and obviously i'm doing something wrong. any help would be appreciate. thanks in advance

// webservice

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Services;
using DataWarehouse;
using System.Web.Script.Services;

namespace DesignAndAlign
{
    /// <summary>
    /// Summary description for AddNewsLetter
    /// </summary>
    [WebService(Namespace = "http://tempuri.org/")]
    [WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1_1)]
    [System.ComponentModel.ToolboxItem(false)]
    // To allow this Web Service to be called from script, using ASP.NET AJAX, uncomment the following line.
    [ScriptService]
    public class AddNewsLetter : System.Web.Services.WebService
    {
        [WebMethod]
        public static void AddMonthlyNewsletter(string emailAddress)
        {
            using (DesignAndAlignEntities context = new DesignAndAlignEntities())
            {
                NewsLetter news = new NewsLetter()
                {
                    SubscriberEmail = emailAddress
                };

                context.NewsLetters.AddObject(news);
                context.SaveChanges();
            }
        }
    }
}

// javascript

    $('.LinkButtonSubscribeEmail').click(function () {
        var value = $('.SubscribeTextBox').val();
        var subscribeError = "";
        var subscribeFlag = false;

        if (value === "") {
            subscribeError = "Please enter an email address for your news subscription.";
            subscribeFlag = true;
        }
        else {
            if (reg.test(value) == false) {
                subscribeError = "Please enter a valid email address.";
                subscribeFlag = true;
            }
        }

        if (subscribeFlag) {
            $('#dialog-message-Error').html('<div style="padding:5px;"><span style="line-height:18px;">' + subscribeError + '</span></div>').dialog(
                        { modal: true, draggable: false, resizable: false, height: 'auto', show: 'slide', buttons: { Ok: function () { $(this).dialog('close'); } } });
            return false;
        }

        if (!subscribeFlag) {
            // $('#dialog-message-Error').html('<div style="padding:5px;"><span style="line-height:18px;">You have been added to the monthly newsletter.<br/>Thank you!</span></div>').dialog(
            //             { modal: true, draggable: false, resizable: false, height: 'auto', show: 'slide', buttons: { Ok: function () { $(this).dialog('close'); } } });

            $.ajax({
                type: "POST",
                url: "AddNewsLetter.asmx/AddMonthlyNewsletter",
                data: "{'emailAddress':'" + value + "'}",
                contentType: "application/json; charset=utf-8",
                dataType: "json",
                success: function (msg) {
                    alert('woohoo');
                }
            });

            $('.SubscribeTextBox').val('');
            return false;
        }
    });

// masterpage

<body>
    <form id="form1" runat="server">
    <asp:ScriptManager ID="ScriptManager1" runat="server">
        <Services>
            <asp:ServiceReference Path="~/AddNewsLetter.asmx" />
        </Services>
    </asp:ScriptManager>
                <div style="margin-left: 30px; margin-top: 5px; width: 300px; float: left;">
                    <div style="float: left; width: 130px;">
                        <input type="button" id="HeaderSubscribeButton" class="HeaderSubscribeButton" />
                        <div class="SubscribeForm">
                            <div class="CloseSubscribeFormButton">
                            </div>
                            <div style="margin-top: 86px; margin-left: 70px;">
                                <asp:TextBox ID="TextBoxSubscribeEmail" runat="server" class="SubscribeTextBox" />
                                <div style="padding-top: 44px; float: right; padding-right: 50px;">
                                    <asp:LinkButton ID="LinkButtonSubscribeEmail" runat="server" Width="100px" Height="25px"
                                        class="LinkButtonSubscribeEmail" />
                                </div>
                            </div>
                        </div>
                    </div>

Re: JSON ajax WebMethod Call

As a first approach to solving the issue, I would recommend you to explore the possible error message from the request to be able to find out additional information about the problem.

var request = $.ajax({
url: "AddNewsLetter.asmx/AddMonthlyNewsletter",
type: "POST",
data: "{'emailAddress':'" + value + "'}",
contentType: "application/json; charset=utf-8",
dataType: "json"

});

request.done(function(msg) {
alert("success");
});

request.fail(function(jqXHR, textStatus) {
alert( "Request failed: " + textStatus );
});

Re: JSON ajax WebMethod Call

all it says is:

Request failed: error

Update:

i added this

request.fail(function (jqXHR, textStatus, errorThrown) {
alert("Request failed: " + textStatus, errorThrown);

and it gave me:

Request failed: error Internal Server Error

is there anything else i can put in there to give more detailed information?

i hovered over the "jqXHR" and it says:

readyState: 4 status: 500

Re: JSON ajax WebMethod Call

hello

try this service:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Services;
using DataWarehouse;
using System.Web.Script.Services;
 
namespace DesignAndAlign
{
    /// <summary>
    /// Summary description for AddNewsLetter
    /// </summary>
    [WebService(Namespace = "http://tempuri.org/")]
    [WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1_1)]
    [System.ComponentModel.ToolboxItem(false)]
    // To allow this Web Service to be called from script, using ASP.NET AJAX, uncomment the following line.
    [ScriptService]
    public class AddNewsLetter : System.Web.Services.WebService
    {
        [WebMethod, System.Web.Script.Services.ScriptMethod]
        public static void AddMonthlyNewsletter(string emailAddress)
        {
            using (DesignAndAlignEntities context = new DesignAndAlignEntities())
            {
                NewsLetter news = new NewsLetter()
                {
                    SubscriberEmail = emailAddress
                };
 
                context.NewsLetters.AddObject(news);
                context.SaveChanges();
            }
        }
    }
}

Re: JSON ajax WebMethod Call

i tried that earlier:

Error 11 Attribute 'System.Web.Script.Services.ScriptService' is not valid on this declaration type. It is only valid on 'class, interface' declarations. C:\Users\Rob\Documents\Visual Studio 2010\Projects\DesignAndAlign\DesignAndAlign\AddNewsLetter.asmx.cs 22 21 DesignAndAlign

thanks though

Re: JSON ajax WebMethod Call

this was in the jqXHR.responseText

<html>
    <head>
        <title>Unknown web method AddMonthlyNewsletter.<br>Parameter name: methodName</title>
        <style>
         body {font-family:"Verdana";font-weight:normal;font-size: .7em;color:black;}
         p {font-family:"Verdana";font-weight:normal;color:black;margin-top: -5px}
         b {font-family:"Verdana";font-weight:bold;color:black;margin-top: -5px}
         H1 { font-family:"Verdana";font-weight:normal;font-size:18pt;color:red }
         H2 { font-family:"Verdana";font-weight:normal;font-size:14pt;color:maroon }
         pre {font-family:"Lucida Console";font-size: .9em}
         .marker {font-weight: bold; color: black;text-decoration: none;}
         .version {color: gray;}
         .error {margin-bottom: 10px;}
         .expandable { text-decoration:underline; font-weight:bold; color:navy; cursor:hand; }
        </style>
    </head>

    <body bgcolor="white">

            <span><H1>Server Error in '/' Application.<hr width=100% size=1 color=silver></H1>

            <h2> <i>Unknown web method AddMonthlyNewsletter.<br>Parameter name: methodName</i> </h2></span>

            <font face="Arial, Helvetica, Geneva, SunSans-Regular, sans-serif ">

            <b> Description: </b>An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.

            <br><br>

            <b> Exception Details: </b>System.ArgumentException: Unknown web method AddMonthlyNewsletter.<br>Parameter name: methodName<br><br>

            <b>Source Error:</b> <br><br>

            <table width=100% bgcolor="#ffffcc">
               <tr>
                  <td>
                      <code>

An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below.</code>

                  </td>
               </tr>
            </table>

            <br>

            <b>Stack Trace:</b> <br><br>

            <table width=100% bgcolor="#ffffcc">
               <tr>
                  <td>
                      <code><pre>

[ArgumentException: Unknown web method AddMonthlyNewsletter.
Parameter name: methodName]
   System.Web.Script.Services.WebServiceData.GetMethodData(String methodName) +539954
   System.Web.Script.Services.RestHandler.CreateHandler(WebServiceData webServiceData, String methodName) +10
   System.Web.Script.Services.RestHandler.CreateHandler(HttpContext context) +159
   System.Web.Script.Services.RestHandlerFactory.GetHandler(HttpContext context, String requestType, String url, String pathTranslated) +62
   System.Web.Script.Services.ScriptHandlerFactory.GetHandler(HttpContext context, String requestType, String url, String pathTranslated) +47
   System.Web.HttpApplication.MapHttpHandler(HttpContext context, String requestType, VirtualPath path, String pathTranslated, Boolean useAppConfig) +203
   System.Web.MapHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +128
   System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean&amp; completedSynchronously) +184
</pre></code>

                  </td>
               </tr>
            </table>

            <br>

            <hr width=100% size=1 color=silver>

            <b>Version Information:</b>&nbsp;Microsoft .NET Framework Version:4.0.30319; ASP.NET Version:4.0.30319.272

            </font>

    </body>
</html>
<!--
[ArgumentException]: Unknown web method AddMonthlyNewsletter.
Parameter name: methodName
   at System.Web.Script.Services.WebServiceData.GetMethodData(String methodName)
   at System.Web.Script.Services.RestHandler.CreateHandler(WebServiceData webServiceData, String methodName)
   at System.Web.Script.Services.RestHandler.CreateHandler(HttpContext context)
   at System.Web.Script.Services.RestHandlerFactory.GetHandler(HttpContext context, String requestType, String url, String pathTranslated)
   at System.Web.Script.Services.ScriptHandlerFactory.GetHandler(HttpContext context, String requestType, String url, String pathTranslated)
   at System.Web.HttpApplication.MapHttpHandler(HttpContext context, String requestType, VirtualPath path, String pathTranslated, Boolean useAppConfig)
   at System.Web.HttpApplication.MapHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute()
   at System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously)
-->

Re: JSON ajax WebMethod Call

Try this for tracing:

request.fail(function(xmlRequest, textStatus) {
alert(xmlRequest.status + ' \n\r ' + xmlRequest.statusText + '\n\r' + xmlRequest.responseText);
});

Re: JSON ajax WebMethod Call

that was a spelling issue i changed that to ScriptMethod.

Re: JSON ajax WebMethod Call

The method will only need the [WebMethod] attribute. Try remove the static keyword.

[WebMethod]
public static void AddMonthlyNewsletter(string emailAddress)

Re: JSON ajax WebMethod Call

thank you very much btw.

but i'm confused. why is it that EVERYWHERE i read they said "WebMethods need to always be static", yet here it doesn't need to be. could you elaborate?

Re: JSON ajax WebMethod Call

Hi robwscott,

For "WebMethod" defined in a standard ASP.NET ASMX webservice, you do not need to mark the function as "Static" one.

However, ASP.NET also supports creating "WebMethod" in ASPX web page class. In such cases, the "WebMethod" you define in ASPX page class need to be "Static" member function. Therefore, I thinkk the reference/articles you saw which said "WebMethods" need to always be static should be targeting the "WebMethod" defined in ASPX web page. Here are some refrences mentioned both approaches:

#Exposing Web Services to Client Script
http://msdn.microsoft.com/en-us/library/bb398998.aspx

#Using Page Methods in ASP.NET AJAX
http://www.singingeels.com/Articles/Using_Page_Methods_in_ASPNET_AJAX.aspx