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我用FaultExceptions定義了一個WCF服務,但客戶端沒有正確捕獲異常。無法正確地從客戶端應用程序中捕獲FaultException <T>
爲異常的合同是:
[DataContract]
public class ServiceFault {
[DataMember]
public string Operation { get; set; }
[DataMember]
public string Reason { get; set; }
[DataMember]
public string Message { get; set; }
}
操作
public interface IProductsService {
[OperationContract]
[FaultContract(typeof(ServiceFault))]
List<string> ListProducts();
}
在操作我介紹了關於目的的錯誤:在客戶端應用程序
public List<string> ListProducts() {
List<string> productsList = null;// = new List<string>();
try {
using (var database = new AdventureWorksEntities()) {
var products = from product in database.Products
select product.ProductNumber;
productsList.Clear(); // Introduced this error on purpose
productsList = products.ToList();
}
}
catch (Exception e) {
throw new FaultException<ServiceFault>(new ServiceFault() {
Operation = MethodBase.GetCurrentMethod().Name,
Reason = "Error ocurred",
Message = e.InnerException.Message
});
}
return productsList;
}
然後,我抓到
catch (FaultException<ServiceFault> ex) {
Console.WriteLine("FaultException<ArgumentFault>: {0} - {1} - {2}",
ex.Detail.Operation, ex.Detail.Reason, ex.Detail.Message);
}
catch (FaultException e) {
Console.WriteLine("{0}: {1}", e.Code.Name, e.Reason);
}
但第二鎖銷被捕獲的錯誤,所以我得到這個消息,而不是(雖然正確不正確的形式)
InternalServiceFault: Object reference not set to an instance of an object
我能做些什麼,使強類型的異常趕上錯誤?
PS:有一個類似的帖子,以這一點,但我不明白它