与WCF流传输的限制 [英] Streamed transfer restrictions with WCF

问题描述

据在MSDN中的以下指南，使用流式传输的任何操作只能有一个输入/输出参数

According to the following guide at MSDN, any operations that use streamed transfers can only have one input/output parameter.

链接： http://msdn.microsoft.com/en-us/library/ms731913.aspx （见标题为关于转让流限制）

Link: http://msdn.microsoft.com/en-us/library/ms731913.aspx (see heading "Restrictions on Streamed Transfers")

我使用WCF服务，让客户/消费者将文件上传到它流传输。上传本身工作正常，但我需要传递两个更多的输入参数与Stream对象一起的一种方式：字符串的文件名和INT用户ID

I'm using streamed transfers for a WCF service that lets clients/consumers upload files to it. The upload itself works fine, but I need a way of passing two more input parameters along with the Stream object: 'string filename' and 'int userid'.

将如何我去这样做。

推荐答案

There's东西叫头，你可以在你的datacontract使用：

There´s something called headers that you can use in your datacontract:

接口的实例：

[ServiceContract]
public interface IFile
{
   [OperationContract]
   Stream DownloadFile(int fileid);

   [OperationContract]
   bool UploadFile(FileUploadMessage request);
}

在一个单独的文件将这个：

Put this in a separate file:

[MessageContract]
public class FileUploadMessage
{
[MessageHeader(MustUnderstand = true)]
public int MyInt {get;set;

[MessageHeader(MustUnderstand = true)]
public string MyString {get;set;

[MessageBodyMember(Order = 1)]
public System.IO.Stream FileByteStream {get;set;}
}

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