c# - FileStreamResult是否关闭Stream？

我的问题类似于以下问题:
Does File() In asp.net mvc close the stream?

我在C#MVC 4中具有以下功能。

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

fs会自动关闭FileStreamResult吗？谢谢!

最佳答案

是的。它在流周围使用using块，并确保资源将被处置。
这是FileStreamResult WriteFile方法的内部implementation:

protected override void WriteFile(HttpResponseBase response)
{
    // grab chunks of data and write to the output stream
    Stream outputStream = response.OutputStream;
    using (FileStream)
    {
        byte[] buffer = new byte[BufferSize];

        while (true)
        {
            int bytesRead = FileStream.Read(buffer, 0, BufferSize);
            if (bytesRead == 0)
            {
                // no more data
                break;
            }

            outputStream.Write(buffer, 0, bytesRead);
        }
    }
}