Question

How do I determine a mapped drive’s actual path?

So if I have a mapped drive on a machine called "Z", how can I use .NET to determine the machine and path for the mapped folder?

The code can assume it’s running on the machine with the mapped drive.

I looked at Path, Directory, and FileInfo objects, but can’t seem to find anything.

I also looked for existing questions, but could not find what I’m looking for.

Answer 1

Here are some code samples:

• Using P/Invoke

All of the magic derives from a Windows function:

    [DllImport("mpr.dll", CharSet = CharSet.Unicode, SetLastError = true)]
    public static extern int WNetGetConnection(
        [MarshalAs(UnmanagedType.LPTStr)] string localName, 
        [MarshalAs(UnmanagedType.LPTStr)] StringBuilder remoteName, 
        ref int length);

Example invocation:

var sb = new StringBuilder(512);
var size = sb.Capacity;
var error = Mpr.WNetGetConnection("Z:", sb, ref size);
if (error != 0)
    throw new Win32Exception(error, "WNetGetConnection failed");
 var networkpath = sb.ToString();