将MemoryStream对象传递给FileStream对象

Question

I have a MemoryStream object, and i want to write it to a file and pass it as a parameter in the following passFile method. The passFile method currently accepts a FileStream object as a parameter, but is there a way where i could convert the MemoryStream object to a FileStream object? Help

MemoryStream ms = new MemoryStream();

public void passFile (FileStream file){

}

Answer 1

No, you cannot cast it: MemoryStream and FileStream are siblings in the inheritance hierarchy, they cannot be cast to one another.

If the method cannot be re-written to take a Stream , you could write the content of the MemoryStream into a temporary file , and then open a FileStream based on the content of that file.

Answer 2

You could use a Stream abstraction, and pass any type of stream as FileStream , MemoryStream , etc... for sample:

public void passFile(Stream stream)
{
   // process stream
}