FileStreamResult关闭流吗？

Question

我的问题是类似这样的问题： Does File() In asp.net mvc close the stream?

我已在遵循C＃MVC 4

FileStream fs = new FileStream(pathToFileOnDisk, FileMode.Open); 
FileStreamResult fsResult = new FileStreamResult(fs, "Text"); 
return fsResult; 

将fs自动被关闭FileStreamResult？谢谢！

Answer 1

是的。它在流的周围使用了一个using块，并确保资源处置。

这里是内部实现FileStreamResult WriteFile的方法：

protected override void WriteFile(HttpResponseBase response) 
{ 
    Stream outputStream = response.OutputStream; 
    using (this.FileStream) 
    { 
     byte[] buffer = new byte[0x1000]; 
     while (true) 
     { 
      int count = this.FileStream.Read(buffer, 0, 0x1000); 
      if (count == 0) 
      { 
       return; 
      } 
      outputStream.Write(buffer, 0, count); 
     } 
    } 
}