如何使用WCF传输大量数据? [英] How to transfer large amount of data using WCF?

问题描述

我们目前正在尝试使用 WCF 和 PollingDuplex 将大量数据移动到 Silverlight 3 客户端.我已经阅读了 Silverlight 4 中的 MultiplerMessagesPerPoll 并且它似乎快了很多.是否有任何示例可供我参考(使用 MultipleMessagesPerPoll)?或者也许有一些关于使用 Net.TCP 的好参考?也许我应该采取完全不同的方法?任何想法或建议将不胜感激.

We are currently trying to move large amounts of data to a Silverlight 3 client using WCF with PollingDuplex. I have read about the MultiplerMessagesPerPoll in Silverlight 4 and it appears to be quite a bit faster. Are there any examples out there for me to reference (using MultipleMessagesPerPoll)? Or maybe some good references on using Net.TCP? Maybe I should be taking a completely different approach? Any ideas or suggestions would be greatly appreciated.

谢谢！

推荐答案

流式序列化响应块效果很好:

Streaming serialized response chunks works well:

您的 WCF 绑定配置将类似于以下内容:

<binding name="myCustomBinding">
   <binaryMessageEncoding />
   <httpTransport transferMode="StreamedResponse" 
                  maxBufferSize="2147483647" 
                  maxBufferPoolSize="2147483647" 
                  maxReceivedMessageSize="2147483647" />
</binding>

您的 Service 方法类似于:

[OperationContract]
public Stream GetDataStream(string objectId)
{
   Stream stream = new MemoryStream();

   MyObject obj = Manager.GetObject(objectId);

   DataContractSerializer serilizer = new DataContractSerializer(typeof(MyObject));

   serilizer.WriteObject(stream, obj);

   stream.Position = 0;

   return stream;
}

您的客户端完成方法会执行以下操作:

static void client_GetDataStreamCompleted(object sender, GetDataStreamCompletedEventArgs e)
{
   if (e.Error == null)
   {
      DataContractSerializer serializer = new DataContractSerializer(typeof(MyObject));

      MyObject obj = serializer.ReadObject(new MemoryStream(e.Result)) as MyObject;
   }
}

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