FileStreamResult是否关闭Stream？

Question

我的问题类似于这个问题: 文件()在asp.net mvc中关闭流吗？

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;

会fs自动关闭FileStreamResult吗？谢谢!

Answer 1

Yes. It uses a using block around the stream, and that ensures that the resource will dispose.

Here is the internal implementation of the FileStreamResult WriteFile method:

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);
        }
    }
}