Toujours obtenir "Format de la requête n'est pas reconnu pour l'URL se terminant inopinément dans ..."

Salutations,

Je l'ai cherché partout et à chaque réponse que je vois me dit de mettre ce qui suit dans mon web.config:

<system.web>
  <webServices>
    <protocols>
      <add name="HttpGet"/>
      <add name="HttpPost"/>
    </protocols>
  </webServices>
</system.web>

Donc je l'ai fait et je suis encore en train de l'erreur.

Voici le script de ma page web:

<script>
    $(function () {
        $('#btn').click(
            function () {
                CallHome();
            }
        );
    });

    function CallHome() {
        $.ajax({
            type: "POST",
            url: "HelloWorld.asmx/HelloWorld",
            dataType: "xml",
            data: "{}",
            contentType: "xml",
            success: function(data) {
                alert(data);
            }
        });
    }
</script>

Et le WebService.vb:

Imports System.Web.Services
Imports System.Web.Services.Protocols
Imports System.ComponentModel
Imports System.Web.Script.Services

<System.Web.Script.Services.ScriptService()> _
<System.Web.Services.WebService(Namespace:="http://tempuri.org/")> _
<System.Web.Services.WebServiceBinding(ConformsTo:=WsiProfiles.BasicProfile1_1)> _
<ToolboxItem(False)> _
Public Class HelloWorld
    Inherits System.Web.Services.WebService

    <WebMethod()> _
    Public Function HelloWorld() As String
        Return "Hello World"
    End Function

End Class

J'ai créé un nouveau projet web afin de réduire au maximum mon exemple au minimum. Quelque part je suis vissage! Pouvez-vous m'aider?

MERCI!

Mise à JOUR: Type de nouveau à fiddler... mais ici, les en-têtes de l'ajax post:

OPTIONS http://localhost:49891/HelloWorld.asmx/HelloWorld HTTP/1.1
Host: localhost:49891
Connection: keep-alive
Access-Control-Request-Method: POST
Origin: null
User-Agent: Mozilla/5.0 (Windows; U; Windows NT 6.1; en-US) AppleWebKit/534.16 (KHTML, like Gecko) Chrome/10.0.648.204 Safari/534.16
Access-Control-Request-Headers: Content-Type, Accept
Accept: */*
Accept-Encoding: gzip,deflate,sdch
Accept-Language: en-US,en;q=0.8
Accept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.3

Et voici les en-têtes, juste quand je suis à une forme normale post (qui fonctionne):

POST http://localhost:49891/HelloWorld.asmx/HelloWorld HTTP/1.1
Host: localhost:49891
Connection: keep-alive
Referer: http://localhost:49891/HelloWorld.asmx?op=HelloWorld
Content-Length: 0
Cache-Control: max-age=0
Origin: http://localhost:49891
User-Agent: Mozilla/5.0 (Windows; U; Windows NT 6.1; en-US) AppleWebKit/534.16 (KHTML, like Gecko) Chrome/10.0.648.204 Safari/534.16
Content-Type: application/x-www-form-urlencoded
Accept: application/xml,application/xhtml+xml,text/html;q=0.9,text/plain;q=0.8,image/png,*/*;q=0.5
Accept-Encoding: gzip,deflate,sdch
Accept-Language: en-US,en;q=0.8
Accept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.3
Cookie: OriginalGUID=2d9e0303-754d-4871-a875-9e184701e91d

Pas sûr si c'est utile...

Mise à JOUR 2:
Et voici la réponse d'erreur du serveur:

HTTP/1.1 500 Internal Server Error
Server: ASP.NET Development Server/10.0.0.0
Date: Mon, 28 Mar 2011 05:06:18 GMT
X-AspNet-Version: 4.0.30319
Cache-Control: private
Content-Type: text/html; charset=utf-8
Content-Length: 4444
Connection: Close
<html>
<head>
<title>Request format is unrecognized for URL unexpectedly ending in '/HelloWorld'.</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>Request format is unrecognized for URL unexpectedly ending in '/HelloWorld'.</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.InvalidOperationException: Request format is unrecognized for URL unexpectedly ending in '/HelloWorld'.<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>
[InvalidOperationException: Request format is unrecognized for URL unexpectedly ending in &#39;/HelloWorld&#39;.]
System.Web.Services.Protocols.WebServiceHandlerFactory.CoreGetHandler(Type type, HttpContext context, HttpRequest request, HttpResponse response) +518909
System.Web.Services.Protocols.WebServiceHandlerFactory.GetHandler(HttpContext context, String verb, String url, String filePath) +212
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:4.0.30319.1
</font>
</body>
</html>
<!-- 
[InvalidOperationException]: Request format is unrecognized for URL unexpectedly ending in &#39;/HelloWorld&#39;.
at System.Web.Services.Protocols.WebServiceHandlerFactory.CoreGetHandler(Type type, HttpContext context, HttpRequest request, HttpResponse response)
at System.Web.Services.Protocols.WebServiceHandlerFactory.GetHandler(HttpContext context, String verb, String url, String filePath)
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)
-->

source d'informationauteur Dave