Asp.net FileStreamResult 是否关闭 Stream

发布于10月09日

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

我在C#MVC4中有以下内容.

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

fs会在FileStreamResult前自动关闭吗？谢谢

推荐答案

对它在流周围使用using个块，这确保了资源将被释放.

下面是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);
        }
    }
}