How to call a WCF service from client script on ajax

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My service contract, named IService1, is as follows

C#

using System.ServiceModel;
    using System.ServiceModel.Web;

    namespace WcfServiceDemo
    {
        [ServiceContract]
        public interface IService1
        {
            [OperationContract]
            [WebInvoke(Method = "POST", ResponseFormat = WebMessageFormat.Json)]
            string GetData(int Value);
        }
    }

Here's my service implementation,

using System.ServiceModel.Activation;

    namespace WcfServiceDemo
    {
        [AspNetCompatibilityRequirements(RequirementsMode = AspNetCompatibilityRequirementsMode.Allowed)]
        public class Service1 : IService1
        {
            public string GetData(int Value)
            {
                return string.Format("You entered: {0}", Value);
            }

        }
    }

My web.config,

XML

<?xml version="1.0"?>
   <configuration>

     <system.web>
       <compilation debug="true" targetFramework="4.0" />
     </system.web>
     <system.serviceModel>

       <behaviors>
         <serviceBehaviors>
           <behavior name ="ServiceBehavior">
             <!-- To avoid disclosing metadata information, set the value below to false before deployment -->
             <serviceMetadata httpGetEnabled="true"/>
             <!-- To receive exception details in faults for debugging purposes, set the value below to true.  Set to false before deployment to avoid disclosing exception information -->
             <serviceDebug includeExceptionDetailInFaults="false"/>
           </behavior>
         </serviceBehaviors>
         <endpointBehaviors>
           <behavior name="EndPointBehavior">
             <enableWebScript />
           </behavior>
         </endpointBehaviors>
       </behaviors>

       <serviceHostingEnvironment multipleSiteBindingsEnabled="true" />

       <services>
         <service name ="WcfDemoService" behaviorConfiguration="ServiceBehavior">
           <endpoint address="" binding="webHttpBinding" contract="IService1" behaviorConfiguration="EndPointBehavior" />
         </service>
       </services>

     </system.serviceModel>
    <system.webServer>
       <modules runAllManagedModulesForAllRequests="true"/>
       <!--
           To browse web app root directory during debugging, set the value below to true.
           Set to false before deployment to avoid disclosing web app folder information.
         -->
       <directoryBrowse enabled="true"/>
     </system.webServer>

   </configuration>

Script for consuming WCF service,

C#

<!DOCTYPE html>

    <html xmlns="http://www.w3.org/1999/xhtml">
    <head runat="server">
        <title></title>
    </head>
    <body>
        <form id="form1" runat="server">
        <div>
            Enter a number:<input type="text" id="txtNum"/>
            <input type="button" onclick="AlertEnteredNum();"/>
        </div>
        </form>
        <script type="text/javascript" src="Script/jquery-1.3.2.min.js"></script>
        <script type="text/javascript">
            function AlertEnteredNum() {
                var Value = $('#txtNum').val();
                $.ajax({
                    type: "POST",
                    contentType: "application/json; charset=utf-8",
                    url: 'Service1.svc/GetData',
                    data: '{"Value": "' + Value + '"}',
                    dataType: "json",
                    processData: false,
                    success: function (data) {
                        alert("Success: " + data.d);
                    },
                    error: function (result) {
                        alert("error: " + result);
                    }
                });
            }
        </script>
    </body>
    </html>

Always error callback

C#

error: function (result) {
                        alert("error: " + result);
                    }

gets executed

I think I need to host on IIS, as I am setting compatibility mode in my config.

But, When I host this service on IIS, I am getting parser error as " The value for the targetFramework attribute is invalid: '4'. Error: FrameworkName cannot have less than two components or more than three components.
Parameter name: frameworkName."

Any suggestion...

Posted 11-Aug-14 3:01am

Rasmita Dash

Updated 11-Aug-14 18:10pm

v2

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Comments

Kornfeld Eliyahu Peter 11-Aug-14 16:58pm

Check that you application pool is set to framework 4.
Re-register framework 4 with IIS...

[no name] 12-Aug-14 0:05am

Yes, I have confirmed these. Application pool has .net4.0. still no luck...
same error callback is getting executed

Kornfeld Eliyahu Peter 12-Aug-14 1:30am

The registration can be more important! Run aspnet_regiis.exe -i from the proper folder of .NET installation!

KVPalem 12-Aug-14 1:19am

Please provide error details

SRS(The Coder) 12-Aug-14 2:12am

Have you tried using 'AjaxEnabledWCFService' its a preconfigured template that can be used directly from ajax.

[no name] 12-Aug-14 5:36am

I was not aware of AjaxEnabledWCFService, Will try now. Thanks

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Rasmita Dash · Answer 1 · 2014-08-11T19:18:00

Finally got my mistake & it's solution.
Just needed to change the service element in config as:

XML

<services>
  <service name="WcfServiceDemo.Service1" behaviorconfiguration="ServiceBehavior">
    <endpoint address="" binding="webHttpBinding" contract="WcfServiceDemo.IService1" behaviorconfiguration="EndPointBehavior" />
  </service>
</services>

where name ="WcfServiceDemo.Service1" is in format "namespace.ServiceImplementationName" & contract="WcfServiceDemo.IService1" is in format "namespace.ServiceContractName"