c# - FileStreamResult 是否关闭 Stream？

Question

我的问题类似于这个问题: Does File() In asp.net mvc close the stream?

我在 C# MVC 4 中有以下内容。

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

fs 会被FileStreamResult 自动关闭吗？谢谢!

Answer 1

是的。它在流周围使用 using block ，确保资源将被释放。

这是内部 implementation FileStreamResult WriteFile 方法:

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);
        }
    }
}