map drive in web service

[EDN Admin]

I have used winAPI to get map drives full path (Example if it is Z:myFolder then it should give as \ServerNameORIPMyFolder.

I have written a code in an library project, which is being called in web service.
Web service is running under windows authentication with Indentity Impersonate = TRUE. I have checked all possible configuration in IIS as well.
Could anybody guide?
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static class Pathing
{
[
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);
 
/// <summary>
 
/// Given a path, returns the UNC path or the original. (No exceptions
 
/// are raised by this function directly). For example, "P:2008-02-29"
 
/// might return: "\networkserverSharesPhotos2008-02-09"
 
/// </summary>
 
/// <param name="originalPath The path to convert to a UNC Path</param>
 
/// <returns>A UNC path. If a network drive letter is specified, the
 
/// drive letter is converted to a UNC or network path. If the
 
/// originalPath cannot be converted, it is returned unchanged.</returns>
 
public static string GetUNCPath(string originalPath)
{
 
StringBuilder sb = new StringBuilder(512);
 
int size = sb.Capacity;
 
// look for the {LETTER}: combination ...
 
if (originalPath.Length > 2 && originalPath[1] == :)
{
 
// dont use char.IsLetter here - as that can be misleading
 
// the only valid drive letters are a-z && A-Z.
 
char c = originalPath[0];
 
if ((c >= a && c <= z) || (c >= A && c <= Z))
{
 
int error = WNetGetConnection(originalPath.Substring(0, 2),
sb,
ref size);
 
if (error == 0)
{
 
DirectoryInfo dir = new DirectoryInfo(originalPath);
 
string path = Path.GetFullPath(originalPath)
.Substring(
Path.GetPathRoot(originalPath).Length);
 
return Path.Combine(sb.ToString().TrimEnd(), path);
}
 
else
{
 
RemoteNameInfo info =new RemoteNameInfo();
info =
WNet.GetRemoteNameInfo(originalPath);
}
}
}
 
return originalPath;
}
}
nilesh k

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