Question

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Convert a Stream to a FileStream in C#

My question is regarding the cast of stream to FileStream …

Basically I need to do that to get the name of the file, because if I have just an object Stream it doesn’t have the Name property, when FileStream does …

So how to do it properly, how to cast Stream object to FileStream …?

Another problem is that this stream comes from webResponse.GetResponseStream() and if I cast it to FileStream I get it empty. Basically I could also use stream but i need to get the file name.

I’m using 3.5

Any ideas?

Answer 1

Use the as operator to perform the cast, if the Stream is not actually a FileStream, null will be returned instead of throwing an exception.

Stream stream = ...;
FileStream fileStream = stream as FileStream;

if(fileStream != null)
{
    //It was really a file stream, get your information here
}
else
{
    //The stream was not a file stream, do whatever is required in that case
}