HTTP/1.1 415 Cannot process the message because the content type 'application/json; charset=utf-8' was not the expected type 'text/xml; charset=utf-8'

问题:

trying to POST json dictionary to C# WCF, when i invoke it HTTP Response 415. Someone can tell me whats wrong with my code.

object Class

 [DataContract] public class Class1 {     [DataMember]     public string AccNo;      [DataMember]     public string CompanyName;      [DataMember]     public string DocDate; } 

IService1.cs

   [OperationContract]     [WebInvoke(Method = "POST", UriTemplate = "json/PostSalesOrderData", RequestFormat = WebMessageFormat.Json, ResponseFormat = WebMessageFormat.Json, BodyStyle = WebMessageBodyStyle.Bare)]         string PostSalesOrderData(string data); 

Service1.svc.cs

 public string PostSalesOrderData(string data)     {          JavaScriptSerializer serializer = new JavaScriptSerializer();          Dictionary<string, Class1> dict = serializer.Deserialize<Dictionary<string, Class1>>(data);          return dict["Debtor"].AccNo.ToString();     } 

Fiddle Details

HTTP/1.1 415 Cannot process the message because the content type 'application/json; charset=utf-8' was not the expected type 'text/xml; charset=utf-8'. Server: Microsoft-IIS/7.5 X-Powered-By: ASP.NET Date: Thu, 29 Nov 2012 01:21:55 GMT Content-Length: 0

回答1:

The endpoint for your service is not properly configured to receive JSON input. In order for the [WebInvoke] attribute to be honored, your endpoint needs to have the webHttpBinding, and it should also have an endpoint behavior of type <webHttp/>

One easy way to ensure that it's properly configured is to use the Factory attribute on the .svc file. Something like the example below:

<%@ ServiceHost Language="C#" Debug="true"                 Service="YourNamespace.YourServiceClass"                 Factory="System.ServiceModel.Activation.WebServiceHostFactory" %> 

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