FileStreamResult是否关闭Stream?

问题描述

我的问题类似于以下问题: File()是否在asp.net mvc中关闭流?

My question is similar to this question:Does File() In asp.net mvc close the stream?

在C#MVC 4中，我有以下内容.

I have the follows in C# MVC 4.

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

fs是否会被FileStreamResult自动关闭?谢谢！

Will fs be closed automatically by FileStreamResult? thanks!

推荐答案

是.它在流周围使用using块，并确保资源将被处置.

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

这是FileStreamResult WriteFile方法的内部实现:

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);
        }
    }
}

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