Unable to get posted data in WCF service in debug mode....

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WCF

jQuery

WCFServices

Hi,
I have written a simple HTML page where I am passing JSON object to WCF service. When I run the service in debug mode (VS2012) and call the page from IE 10, Debugger gets called but in a parameter place object passed is null..

jQuery Code:

var objJSON = {
   "postJSON": {
      "id": "0",
      "emp_name": "abc",
      "emp_city": "delhi",
      "emp_addr": "india"
   }
};

$.ajax({
   type: "POST",
   url: "http://localhost:8080/MainService.svc/updatedata",
   data: JSON.stringify(objJSON),
   dataType: "json",
   contentType: "application/json; charset=utf-8",
   processData:true,
   success: function (objSuccess) {
      console.log("success");
      console.log(JSON.stringify(objSuccess));
   }
   ,
   error: function (objError) {
      console.log("error");
      alert(JSON.stringify(objError));
   }
});

WCF Service Code:

MainService.svc.cs

public ClsEmployee UpdateEmployee(ClsEmployee objEmployee)
{
   new ClsTransaction().updateRecord(objEmployee);

Service Contract

[OperationContract]
   [WebInvoke(Method = "POST", 
      ResponseFormat = WebMessageFormat.Json, 
      RequestFormat = WebMessageFormat.Json, 
      BodyStyle = WebMessageBodyStyle.Wrapped, 
      UriTemplate = "updatedata")]
   ClsEmployee UpdateEmployee(ClsEmployee postJSON);
}