File.Exists returning false from a network share

asp.net file network-shares
Ryan Smith picture Ryan Smith · Dec 30, 2008 · Viewed 7.6k times · Source

I've been working on a ASP.NET project that is going to save uploaded files to a network share. I figured I could just use a virtual directory and be fine, but I have been struggling with permissions for Directory.CreateDirectory.

I was able to upload files so I decided to change my code to place everything in a single directory, however this requires me to make use of File.Exists to avoid overwriting duplicates.

Now that I have all my code updated, I have discovered that no matter what I do, File.Exists always returns false (The file definitely exists) when I test against the network share.

Any ideas? I'm coming to the very end of my rope with network shares.

Answer

JaredPar picture JaredPar · Dec 30, 2008

File.Exist doesn't actually check for existance of a file. It instead checks for Existance of files that you have some measure of access to. If you know the file exists, the likely problem is that you don't have access to it.

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