互连流

Question

我有这种情况:

DownloadLibrary.GetData(Stream targetStream);
SaveLibrary.WriteData(Stream sourceStream);

我想将targetStream收集的数据发送到sourceStream.我想出了一些解决方案,但我找不到直接连接这些流的方法.

我想要实现的是将数据从targetStream发送到sourceStream而不首先缓冲targetStream.

怎么做到呢？

提前致谢.

Answer 1

内置支持(来自.Net 4.0),Stream用于通过以下方式将一个流复制到另一个流CopyTo:

stream1.CopyTo(stream2)

例:

[Test]
public void test()
{
    string inString = "bling";

    byte[] inBuffer = Encoding.ASCII.GetBytes(inString);

    Stream stream1 = new MemoryStream(inBuffer);
    Stream stream2 = new MemoryStream();

    //Copy stream 1 to stream 2
    stream1.CopyTo(stream2);

    byte[] outBuffer = new byte[inBuffer.Length];

    stream2.Position = 0;        
    stream2.Read(outBuffer, 0, outBuffer.Length);

    string outString = Encoding.ASCII.GetString(outBuffer);

    Assert.AreEqual(inString, outString, "inString equals outString.");
}