public static string GetUncPathForLocalPath(string fileName)
{
if (String.IsNullOrEmpty(fileName))
{
return(String.Empty);
}
if (fileName.StartsWith(@"\\"))
{
return(fileName);
}
fileName = Path.GetFullPath(fileName);
if (!IsValidLocalFilePath(fileName) || !Directory.Exists(fileName))
{
return(String.Empty);
}
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 (nRet == ERROR_MORE_DATA)
{
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
List <ShareInfo> shareInfoList = GetShareInfo();
if (shareInfoList != null)
{
ShareInfo shareInfo = FindBestShareInfoMatch(shareInfoList, fileName);
if (shareInfo != null)
{
// TODO : (Steph) verify what this ugly code is doing ...
string path = shareInfo.Path;
if (!String.IsNullOrEmpty(path))
{
int index = path.Length;
if (Path.DirectorySeparatorChar != path[path.Length - 1])
{
index++;
}
if (index < fileName.Length)
{
fileName = fileName.Substring(index);
}
else
{
fileName = String.Empty;
}
return(Path.Combine(shareInfo.ToString(), fileName));
}
}
}
return(String.Empty);
default:
return(String.Empty);
}
}
