WCF分块/流 [英] WCF Chunking / Streaming

问题描述

我正在使用WCF，并希望将大文件从客户端上传到服务器。我已经调查并决定采用 http://msdn.microsoft .com / en-us / library / aa717050.aspx

I'm using WCF and want to upload a large file from the client to the server. I have investigated and decided to follow the chunking approach outlined at http://msdn.microsoft.com/en-us/library/aa717050.aspx

但是，这种方法（就像流式传输一样）将合同限制在有限的方法签署上：

However, this approach (just like streaming) restricts the contract to limited method signitures:

[OperationContract(IsOneWay=true)]
[ChunkingBehavior(ChunkingAppliesTo.InMessage)]
void UploadStream(Stream stream);

该示例使用了一个相当方便的示例，即从固定路径上载文件并将其保存到固定路径服务器上的路径。因此，我的问题是如何传递其他参数来指定文件名，文件路径等内容。

The sample uses the rather convenient example of uploading a file from a fixed path and saving it to a fixed path on the server. Therefore, my question is how do I pass additional parameters to specify things like filename, filepath etc.

例如。我想要类似的东西：

eg. I would like something like:

[OperationContract(IsOneWay=true)]
[ChunkingBehavior(ChunkingAppliesTo.InMessage)]
void UploadStream(Stream stream, String filePath);

在此先感谢
Mark。

Thanks in advance, Mark.

推荐答案

本文解释了如何使用MessageHeader属性强制事物在标头中传递，因此不算作参数。因此，与其传递流和其他元数据，不如创建一个具有MessageContract属性的类，并将所有元数据标记为MessageHeader。然后，将流标记为MessageBodyMember（文章错误地将其称为 MessageBody）。让您的UploadStream方法使用一个参数，该参数的类型应为您刚创建的MessageContract类的类型。我已经成功完成了此操作，但还没有与分块配合进行。祝你好运。

This article explains how to use the MessageHeader attribute to force things to be passed in the header, and therefore not count as a parameter. So, instead of passing a stream and other meta data, create a class that has the attribute MessageContract and mark all of the meta data as a MessageHeader. Then, mark the stream as a MessageBodyMember (which the article incorrect calls "MessageBody"). Have your UploadStream method take a single parameter whose type is that of the MessageContract class you've just created. I've done this successfully, but I haven't done it in tandem with chunking. Good luck.

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