/// <summary>
/// Returns the UNC path for a mapped drive or local share.
/// </summary>
/// <param name="fileName">The path to map</param>
/// <returns>The UNC path (if available)</returns>
public static string PathToUnc(string fileName)
{
if (null == fileName || 0 == fileName.Length)
{
return(string.Empty);
}
fileName = Path.GetFullPath(fileName);
if (!IsValidFilePath(fileName))
{
return(fileName);
}
int nRet = 0;
UNIVERSAL_NAME_INFO rni = new UNIVERSAL_NAME_INFO();
int bufferSize = Marshal.SizeOf(rni);
nRet = WNetGetUniversalName(
fileName, UNIVERSAL_NAME_INFO_LEVEL,
ref rni, ref bufferSize);
if (ERROR_MORE_DATA == nRet)
{
IntPtr pBuffer = Marshal.AllocHGlobal(bufferSize);;
try
{
nRet = WNetGetUniversalName(
fileName, UNIVERSAL_NAME_INFO_LEVEL,
pBuffer, ref bufferSize);
if (NO_ERROR == nRet)
{
rni = (UNIVERSAL_NAME_INFO)Marshal.PtrToStructure(pBuffer,
typeof(UNIVERSAL_NAME_INFO));
}
}
finally
{
Marshal.FreeHGlobal(pBuffer);
}
}
switch (nRet)
{
case NO_ERROR:
return(rni.lpUniversalName);
case ERROR_NOT_CONNECTED:
//Local file-name
ShareCollection shi = LocalShares;
if (null != shi)
{
SambaShare share = shi[fileName];
if (null != share)
{
string path = share.Path;
if (null != path && 0 != path.Length)
{
int index = path.Length;
if (Path.DirectorySeparatorChar != path[path.Length - 1])
{
index++;
}
if (index < fileName.Length)
{
fileName = fileName.Substring(index);
}
else
{
fileName = string.Empty;
}
fileName = Path.Combine(share.ToString(), fileName);
}
}
}
return(fileName);
default:
return(string.Empty);
}
}
