StreamReader的到文件？ [英] StreamReader to file?

问题描述

我有一个输入流包装在一个就是System.IO.StreamReader ......我希望写流的一个文件（即StreamWriter的）内容

I have an input stream wrapped in a System.IO.StreamReader... I wish to write the content of the stream to a file (i.e. StreamWriter).

InputStream的长度是未知的。可能是几个字节和千兆字节的长度。

The length of the inputstream is unknown. Could be a few bytes and to gigabytes in length.

这是如何做到的最简单，不占用太多的内存？

How is this done the easiest that does not take up too much memory?

推荐答案

事情是这样的：

public static void CopyText(TextReader input, TextWriter output)
{
    char[] buffer = new char[8192];
    int length;
    while ((length = input.Read(buffer, 0, buffer.Length)) > 0)
    {
        output.Write(buffer, 0, length);
    }
}

请注意，这是非常相似，你会写什么到一个流中的内容复制到另一个 - 这恰好是二进制数据的文本数据，而不是

Note that this is very similar to what you'd write to copy the contents of one stream to another - this just happens to be text data instead of binary data.

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