How to get full path of StreamWriter

c# streamwriter
Oleg Vazhnev picture Oleg Vazhnev · May 7, 2012 · Viewed 26.9k times · Source

I'm creating a StreamWriter using a relative path. But the file doesn't appear. To troubleshoot, I want to check that the full path is what I'm expecting. So having a StreamWriter instance, how can I get the full path of the file it's going to write to?

string fileName = "relative/path.txt"
StreamWriter sw= new StreamWriter(fileName);
// What is the full path of 'sw'?

Answer

Jeppe Stig Nielsen picture Jeppe Stig Nielsen · May 7, 2012

In my version of the framework, this seems to work:

string fullPath = ((FileStream)(streamWriter.BaseStream)).Name;

(Found by debugging.)

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