the content type 'application/json; charset=utf-8' was not the expected type 'text/xml; charset=utf-8'
asp.net-mvc-4, json, wcf
Solution
You need to use the `WebServiceHostFactory`, instead of the regular `ServiceHostFactory` in your code. That will configure the endpoint with the appropriate binding (`webHttpBinding`) and behavior (`webHttp`) to honor the `[WebInvoke]` attribute.
<serviceHostingEnvironment >
<serviceActivations>
<add factory="System.ServiceModel.Activation.WebServiceHostFactory"
relativeAddress="./wsccc1/wscccService.svc"
service="service.wservice"/>
</serviceActivations>
</serviceHostingEnvironment>
Problem
When using firebug, I got this wired error "NetworkError: 415 Cannot process the ...xt/xml; charset=utf-8'. - `http://localhost:59899/wsccc1/wscccService.svc/RunTts`" in my asp.net mvc 4 project. The code: ``` <script lang="javascript" type="text/javascript"> function ttsFunction() { serviceUrl = "http://localhost:59899/wsccc1/wscccService.svc/RunTts"; var data = new Object(); data.text = $('#speak').val(); var jsonString = JSON.stringify(data); $.ajax({ type: 'POST', url: serviceUrl, data: jsonString, contentType: 'application/json; charset=utf-8', dataType: 'json', success: function() { alert('ok')}, error: function (xhr,status,error) { console.log("Status: " + status); console.log("Error: " + error); console.log("xhr: " + xhr.readyState); }, statusCode: { 404: function() { console.log('page not found'); } } }); } </script> ``` The service code: ``` [AspNetCompatibilityRequirements(RequirementsMode = AspNetCompatibilityRequirementsMode.Allowed)] [ServiceBehavior(IncludeExceptionDetailInFaults = true)] public class wservice:Iwservice { public string RunTts(string value) { return value.ToUpper(); } } ``` The interface is: ``` namespace service { [ServiceContract] public interface Iwservice { [OperationContract] [WebInvoke(Method = "POST", RequestFormat = WebMessageFormat.Json, ResponseFormat = WebMessageFormat.Json, BodyStyle = WebMessageBodyStyle.Wrapped, UriTemplate = "RunTts")] string RunTts(string text); } } ``` And web config, I used file-less in WCF.: ``` <?xml version="1.0"?> <configuration> <system.web> <compilation debug="true" targetFramework="4.5"/> <httpRuntime targetFramework="4.5"/> </system.web> <system.serviceModel> <serviceHostingEnvironment > <serviceActivations> <add factory="System.ServiceModel.Activation.ServiceHostFactory" relativeAddress="./wsccc1/wscccService.svc" service="service.wservice"/> </serviceActivations> </serviceHostingEnvironment> <behaviors> <serviceBehaviors> <behavior> <serviceMetadata httpGetEnabled="true"/> </behavior> </serviceBehaviors> </behaviors> </system.serviceModel> </configuration> ```