我写在MVC4的应用程序。

I am writing an application in MVC4.

我在服务器上的物理pdf文件。我想将其转换为一个内存流并寄回给用户，像这样

I have a physical pdf file on the server. I want to convert this to a memory stream and send it back to the user like so

返回文件（流应用程序/ PDF格式，myPDF.pdf）;

return File(stream, "application/pdf", "myPDF.pdf");

但我怎么转换PDF文件到内存流？

but how do I convert a pdf file to a memory stream?

感谢

推荐答案

您不必的MemoryStream 。最简单的方法是使用过载接受的文件名：

You don't need MemoryStream. Easiest way is to use overload that accepts file name:

return File(@"C:\MyFile.pdf", "application/pdf");

另一种解决方案是使用重载，接受字节[] ：

return File(System.IO.File.ReadAllBytes(@"C:\Myfile.pdf"), "application/pdf");

如果你想使用的FileStream ：

return File(new FileStream(@"C:\MyFile.pdf", FileMode.Open, FileAccess.Read), "application/pdf");