c# - 如何从字符串生成流？(How do I generate a stream from a string?)

Question

I need to write a unit test for a method that takes a stream which comes from a text file.

(我需要为采用来自文本文件的流的方法编写单元测试。)

I would like to do do something like this:

(我想做这样的事情：)

Stream s = GenerateStreamFromString("a,b 
 c,d");

  ask by Omu translate from so

Answer 1

public static Stream GenerateStreamFromString(string s)
{
    var stream = new MemoryStream();
    var writer = new StreamWriter(stream);
    writer.Write(s);
    writer.Flush();
    stream.Position = 0;
    return stream;
}

Don't forget to use Using:

(不要忘记使用“使用”：)

using (var stream = GenerateStreamFromString("a,b 
 c,d"))
{
    // ... Do stuff to stream
}

---

About the StreamWriter not being disposed.

(关于StreamWriter尚未处理。)

StreamWriter is just a wrapper around the base stream, and doesn't use any resources that need to be disposed.

(StreamWriter只是基本流的包装，并且不使用任何需要处理的资源。)

The Dispose method will close the underlying Stream that StreamWriter is writing to.

(Dispose方法将关闭StreamWriter写入的基础Stream 。)

In this case that is the MemoryStream we want to return.

(在这种情况下，我们要返回的是MemoryStream 。)

In .NET 4.5 there is now an overload for StreamWriter that keeps the underlying stream open after the writer is disposed of, but this code does the same thing and works with other versions of .NET too.

(在.NET 4.5中， StreamWriter现在有一个重载，可以在处置编写器后使基础流保持打开状态，但是此代码执行相同的操作，并且也可以与其他版本的.NET一起使用。)

See Is there any way to close a StreamWriter without closing its BaseStream?

(请参见是否可以在不关闭StreamWriter的BaseStream的情况下将其关闭？)