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Correct way to do UNC

Posted on 2013-06-08
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Last Modified: 2013-06-09
For years, In my VB.NET Windows Application I have been storing what I thought was a UNC path as something like \\COVET\C\00a\test.pdf. Many of my users have used this naming with access from all computers on a network. Recently, I had a problem with two users. Upon testing with,

If System.IO.File.Exists(\\COVET\C\00a\test.pdf) = True Then

I get a path not found error even though the file is there. I started Googling UNC and it seems everyone uses \\Server\Folder\File with no drive letter. I thought perhaps the drive letter was unnecessary, but when I delete it to \\COVET\00a\test.pdf, my computer cannot find the file. This is driving me crazy.

Can someone tell me the correct way to store paths so everyone on a network can access the file?
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Question by:LeeLiam
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Expert Comment

by:Julian Hansen
ID: 39232002
The "drive letter" as you refer to it has to be a share on the remote computer - you cannot refer to a native drive without it first being shared.

The exception is the hidden share of c$ - but that should be locked down and not used.

I guess you had a share on COVET C: drive shared as C and for some reason this share was removed or had security permissions changed

UNC should be \\Server\Share\Folder\Folder\Folder ... etc

Check the shares on COVET.
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Author Comment

by:LeeLiam
ID: 39232267
Ok, I think I get it. Yes on my Covet, the C drive is shared as C. So when you say "a share on the remote comuter", in my case it is the drive. But what I don't understand is what if the drive is not shared and the file is in the C:\Users\Public folder and it is shared. What would the UNC look like? Would it be \\Covet\Users\Public\test.pdf?
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Julian Hansen earned 500 total points
ID: 39232570
If public folder is shared as "Public then the UNC would be

\\Covet\Public\test.pdf
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Expert Comment

by:Julian Hansen
ID: 39232571
That is assuming test.pdf is in the Public folder
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Author Closing Comment

by:LeeLiam
ID: 39233149
Excellent. I guess I was trying to make it harder than it really is.

Thanks for the help.
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Expert Comment

by:Julian Hansen
ID: 39233488
You are welcome - thanks for the help.
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