编辑： 使用适当的自定义json错误处理程序更新了帖子
快速但不推荐的方式。
<serviceDebug includeExceptionDetailInFaults="true"/>
在您的服务行为中会为您提供所需的所有详细信息。
不错的方法
应用程序中的所有异常都将转换为，
JsonError并使用进行序列化
DataContractJsonSerializer。的
Exception.Message是直接使用。FaultException提供FaultCode，而其他异常则以Faultpre
-1威胁为未知。
FaultException是使用HTTP状态代码400发送的，其他异常是HTTP代码500-内部服务器错误。这不是必需的，因为故障代码可用于确定它是否是未知错误。但是在我的应用程序中很方便。
错误处理程序
internal class CustomErrorHandler : IErrorHandler{ public bool HandleError(Exception error) { //Tell the system that we handle all errors here. return true; } public void ProvideFault(Exception error, System.ServiceModel.Channels.MessageVersion version, ref System.ServiceModel.Channels.Message fault) { if (error is FaultException<int>) { FaultException<int> fe = (FaultException<int>)error; //Detail for the returned value int faultCode = fe.Detail; string cause = fe.Message; //The json serializable object JsonError msErrObject = new JsonError { Message = cause, FaultCode = faultCode }; //The fault to be returned fault = Message.CreateMessage(version, "", msErrObject, new DataContractJsonSerializer(msErrObject.GetType())); // tell WCF to use JSON encoding rather than default XML WebBodyFormatMessageProperty wbf = new WebBodyFormatMessageProperty(WebContentFormat.Json); // Add the formatter to the fault fault.Properties.Add(WebBodyFormatMessageProperty.Name, wbf); //Modify response HttpResponseMessageProperty rmp = new HttpResponseMessageProperty(); // return custom error pre, 400. rmp.StatusCode = System.Net.HttpStatusCode.BadRequest; rmp.StatusDescription = "Bad request"; //Mark the jsonerror and json content rmp.Headers[HttpResponseHeader.ContentType] = "application/json"; rmp.Headers["jsonerror"] = "true"; //Add to fault fault.Properties.Add(HttpResponseMessageProperty.Name, rmp); } else { //Arbitraty error JsonError msErrObject = new JsonError { Message = error.Message, FaultCode = -1}; // create a fault message containing our FaultContract object fault = Message.CreateMessage(version, "", msErrObject, new DataContractJsonSerializer(msErrObject.GetType())); // tell WCF to use JSON encoding rather than default XML var wbf = new WebBodyFormatMessageProperty(WebContentFormat.Json); fault.Properties.Add(WebBodyFormatMessageProperty.Name, wbf); //Modify response var rmp = new HttpResponseMessageProperty(); rmp.Headers[HttpResponseHeader.ContentType] = "application/json"; rmp.Headers["jsonerror"] = "true"; //Internal server error with exception mesasage as status. rmp.StatusCode = System.Net.HttpStatusCode.InternalServerError; rmp.StatusDescription = error.Message; fault.Properties.Add(HttpResponseMessageProperty.Name, rmp); } } #endregion}用于安装上述错误处理程序的Web行为
internal class AddErrorHandlerBehavior : WebHttpBehavior{ protected override void AddServerErrorHandlers(ServiceEndpoint endpoint, EndpointDispatcher endpointDispatcher) { base.AddServerErrorHandlers(endpoint, endpointDispatcher); //Remove all other error handlers endpointDispatcher.ChannelDispatcher.ErrorHandlers.Clear(); //Add our own endpointDispatcher.ChannelDispatcher.ErrorHandlers.Add(new CustomErrorHandler()); }}json错误数据协定
指定json错误格式。在此处添加属性以更改错误格式。
[DataContractFormat]public class JsonError{ [DataMember] public string Message { get; set; } [DataMember] public int FaultCode { get; set; }}使用错误处理程序
自托管
ServiceHost wsHost = new ServiceHost(new Webservice1(), new Uri("http://localhost/json"));ServiceEndpoint wsEndpoint = wsHost.AddServiceEndpoint(typeof(IWebservice1), new WebHttpBinding(), string.Empty);wsEndpoint.Behaviors.Add(new AddErrorHandlerBehavior());App.config
<extensions> <behaviorExtensions> <add name="errorHandler" type="WcfServiceLibrary1.ErrorHandlerElement, WcfServiceLibrary1" /> </behaviorExtensions> </extensions>
