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Editorial Team
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Asked: 2026-05-12T13:34:47+00:00

In Delphi there is a function ExpandUNCFileName that takes in a filename and converts

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In Delphi there is a function ExpandUNCFileName that takes in a filename and converts it into the UNC equivalent. It expands mapped drives and skips local and already expanded locations.

Samples

C:\Folder\Text.txt -> C:\Folder\Text.txt
L:\Folder\Sample.txt -> \\server\Folder1\Folder\Sample.txt Where L: is mapped to \\server\Folder1\
\\server\Folder\Sample.odf -> \server\Folder\Sample.odf

Is there a simple way to do this in C# or will I have to use windows api call WNetGetConnection and then manually check the ones that wouldn’t get mapped?

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1 Answer

  1. Editorial Team

    There is no built-in function in the BCL which will do the equivalent. I think the best option you have is pInvoking into WNetGetConnection as you suggested.

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