获取Response.output大小? [英] Get Response.output size?

问题描述

我的代码现在是这样的:

My code is now like this:

var xmlSerializer = new XmlSerializer(typeof(DataSet));
xmlSerializer.Serialize(Response.Output, ds);

之后，我想显示尺寸，但这给了我一个错误:

After that I want to show the size, but this gives me an error:

Response.AddHeader("Content-Length", Response.OutputStream.Length.ToString());

错误是

NotSupportedException was unhandled by user code

推荐答案

Response.OutputStream 不支持 Length 属性；你无法得到长度.一个问题是，如果启用了 Keep-Alive (通常情况下)，则 Stream 可能会超出 Response .这就是为什么您根本无法获得 Length 的原因...但是...

The Response.OutputStream does not support a Length property; you can not get the length. One problem is, that Stream could outlive the Response if, as is usually the case, Keep-Alive is enabled. That's why you can't get a Length at all... But...

还要注意，这里的Stream不仅发送内容，还发送标头.这使得使用您希望的方式完全不合适(因为您生成的 Content-Length 标头将是错误的.)因此，即使您可以获得 Length ，那不是你想要的.

Also note that the Stream here is sending more than just the content - it's also sending the headers. That makes it wholly inappropriate to use how you are hoping to use it (since your resulting Content-Length header would be incorrect.) So even if you could get the Length, it would not be what you want.

无论如何，这又是不可能的:您要设置的标头是一部分，该 Stream 上将会发生什么....看到问题了吗?

And it's impossible again, anyway: The header you are attempting to set is part of what would be going out on that Stream.... see the problem?

不过，FosterZ为您提供了一条尝试解决此问题的不同途径.您需要获得真正要测量的长度-而不是测量流的长度.

FosterZ has given you a different route to go to try to solve this problem, though; you need to get the length of what you really want to measure - not of the stream.

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