For request in operation xx to be a stream the operation must have a sing...

小渣渣

For request in operation xx to be a stream the operation must have a single parameter whose type is Stream.

翻译：在操作中的请求是一个流的操作必须有一个单一的参数，其类型是流。


我的大体理解意思就是，如果参数为stream流，就不能有其他的参数，

我方法里面有3个参数，可能是这个原因吧，毕竟刚玩wcf，对这套还不熟悉。

http://stackoverflow.com/questions/15495506/for-request-in-operation-uploadphotostream-to-be-a-stream-the-operation-must-hav/15609508

1. namespace StackSample.Logic
   
2. {
   
3.     [ServiceHeaderBehavior]
   
4.     [MerchantHeaderBehavior]
   
5.     [AspNetCompatibilityRequirements(RequirementsMode = AspNetCompatibilityRequirementsMode.Allowed)]
   
6.     public class Merchant : Interfaces.IMerchant
   
7.     {
   
8.         public bool UploadPhotoStream(string productid, string photoid, Stream fileData)
   
9.         {
   
10.             Logic.Components.Product ca = new Logic.Components.Product();
    
11.             return ca.UploadPhotoStream(Common.UserValues().Merchant, productid, photoid, fileData);
    
12.         }
    
13.     }
    
14. }
    
15. 
    
16. namespace StackSample.Interfaces
    
17. {
    
18.     [ServiceContract]
    
19.     public interface IMerchant
    
20.     {
    
21.         [OperationContract]
    
22.         [WebInvoke(UriTemplate = "UploadPhotoStream?productid={productid}&photoid={photoid}", Method = "POST")]
    
23.         bool UploadPhotoStream(string productid, string photoid, Stream fileData);
    
24.     }
    
25. }  

复制代码

看到那哥们，错误和我差不多。

解决办法如下：

定义一个对象，如下：

1. [DataContract]
   
2.     public class UploadModel
   
3.     {
   
4.         [DataMember]
   
5.         public string Name { get; set; }
   
6. 
   
7.         [DataMember]
   
8.         public Stream stream { get; set; }
   
9.     }

复制代码

1. [ServiceContract]
   
2.     public interface WcfService
   
3.     {
   
4.         [OperationContract]
   
5.         bool Upload(UploadModel file,out string Image_Path);
   
6.     }

复制代码