是否处理的StreamReader关闭流？ [英] Does disposing streamreader close the stream?

问题描述

我发送一个流的方法来写，并在这些方法我使用的是二进制读/ wrtier。当读/写器得到处理，或者通过使用或只是当它没有被引用，是流闭以及??

I am sending a stream to methods to write on, and in those methods I am using a binary reader/wrtier. When the reader/writer gets disposed, either by using or just when it is not referenced, is the stream closed as well??

我会送一个BinaryReader /作家，但我使用一个StreamReader太（也许我应该去解决这一问题。我只使用，对于函数getline和readline）。这是很麻烦的，如果每一个作家/读者被关闭时关闭该流。

I would send a BinaryReader/Writer, but I am using a StreamReader too (maybe I should go around that. I am only using that for GetLine and ReadLine). This is quite troublesome if it closes the stream each time a writer/reader gets closed.

推荐答案

是的StreamReader ，的StreamWriter ， BinaryReader 和的BinaryWriter 全部关闭/处置其底层流当你调用的Dispose 他们。他们的不的处分流，如果读/写器只是收集垃圾，但 - 你应该总是处置读/写器，$ P $的pferrably一个使用语句。 （事实上​​，没有这些类都有终结，也不应该有。）

Yes, StreamReader, StreamWriter, BinaryReader and BinaryWriter all close/dispose their underlying streams when you call Dispose on them. They don't dispose of the stream if the reader/writer is just garbage collected though - you should always dispose of the reader/writer, preferrably with a using statement. (In fact, none of these classes have finalizers, nor should they have.)

我个人preFER有一个using语句流为好。您可以嵌套使用语句没有括号相当整齐的：

Personally I prefer to have a using statement for the stream as well. You can nest using statements without braces quite neatly:

using (Stream stream = ...)
using (StreamReader reader = new StreamReader(stream, Encoding.Whatever))
{
}

尽管视频流的使用语句是有些多余的（除非的StreamReader 构造函数抛出异常），我认为这是最好的做法，因为这时如果你摆脱的StreamReader ，只是直接使用流在以后的日子，你已经有正确的处​​理语义。

Even though the using statement for the stream is somewhat redundant (unless the StreamReader constructor throws an exception) I consider it best practice as then if you get rid of the StreamReader and just use the stream directly at a later date, you'll already have the right disposal semantics.

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