public static string GetName(string path_src)
{
string unc_path_dest = path_src; //解決できないエラーが発生した場合は、入力されたパスをそのまま戻す
int size = 1;
/*
* 前処理
* 意図的に、ERROR_MORE_DATAを発生させて、必要なバッファ・サイズ(size)を取得する。
*/
//1バイトならば、確実にERROR_MORE_DATAが発生するだろうという期待。
IntPtr lp_dummy = Marshal.AllocCoTaskMem(size);
//サイズ取得をトライ
int apiRetVal = WNetGetUniversalName(path_src, UNIVERSAL_NAME_INFO_LEVEL, lp_dummy, ref size);
//ダミーを解放
Marshal.FreeCoTaskMem(lp_dummy);
/*
* UNC変換処理
*/
switch (apiRetVal)
{
case ERROR_MORE_DATA:
//受け取ったバッファ・サイズ(size)で再度メモリ確保
IntPtr lpBufUniversalNameInfo = Marshal.AllocCoTaskMem(size);
//UNCパスへの変換を実施する。
apiRetVal = WNetGetUniversalName(path_src, UNIVERSAL_NAME_INFO_LEVEL, lpBufUniversalNameInfo, ref size);
//UNIVERSAL_NAME_INFOを取り出す。
UNIVERSAL_NAME_INFO a = (UNIVERSAL_NAME_INFO)Marshal.PtrToStructure(lpBufUniversalNameInfo, typeof(UNIVERSAL_NAME_INFO));
//バッファを解放する
Marshal.FreeCoTaskMem(lpBufUniversalNameInfo);
if (apiRetVal == NO_ERROR)
{
//UNCに変換したパスを返す
unc_path_dest = a.lpUniversalName;
}
else
{
//MessageBox.Show(path_src +"ErrorCode:" + apiRetVal.ToString());
}
break;
case ERROR_BAD_DEVICE: //すでにUNC名(\\servername\test)
case ERROR_NOT_CONNECTED: //ローカル・ドライブのパス(C:\test)
//MessageBox.Show(path_src +"\nErrorCode:" + apiRetVal.ToString());
break;
default:
//MessageBox.Show(path_src + "\nErrorCode:" + apiRetVal.ToString());
break;
}
return(unc_path_dest);
}
protected static string GetUniversalName(string path, int bufferSize)
{
IntPtr buffer = IntPtr.Zero;
try
{
buffer = Marshal.AllocHGlobal(bufferSize);
int oldBufferSize = bufferSize;
int errorCode =
WNetGetUniversalName(path, UNIVERSAL_NAME_INFO_LEVEL, buffer, ref bufferSize);
if (errorCode == ERROR.SUCCESS)
{
// all clear
UNIVERSAL_NAME_INFO uni =
(UNIVERSAL_NAME_INFO)Marshal.PtrToStructure(buffer, typeof(UNIVERSAL_NAME_INFO));
return(uni.lpUniversalName);
}
else if (errorCode == ERROR.MORE_DATA)
{
Debug.Assert(bufferSize > oldBufferSize);
// more data available....
return(GetUniversalName(path, bufferSize));
}
else
{
// error occurred... probably invalid path or device went away
// Call Debug.Fail on unexpected errors
switch (errorCode)
{
// these two errors are expected
case ERROR.BAD_DEVICE:
case ERROR.NOT_CONNECTED:
break;
default:
Debug.WriteLine("Encountered error " + errorCode + " while trying to get universal name for " + path);
break;
}
return(null);
}
}
finally
{
if (buffer != IntPtr.Zero)
{
Marshal.FreeHGlobal(buffer);
}
}
}
//
//GetUNCPath function
//
public static string GetUNCPath(string mappedDrive)
{
string uncpath = mappedDrive;
UNIVERSAL_NAME_INFO rni = new UNIVERSAL_NAME_INFO();
int bufferSize = Marshal.SizeOf(rni);
int nRet = WNetGetUniversalName(mappedDrive, UNIVERSAL_NAME_INFO_LEVEL, ref rni, ref bufferSize);
if (ERROR_MORE_DATA == nRet)
{
IntPtr pBuffer = default(IntPtr);
try
{
pBuffer = Marshal.AllocHGlobal(bufferSize);
nRet = WNetGetUniversalName(mappedDrive, UNIVERSAL_NAME_INFO_LEVEL, pBuffer, ref bufferSize);
if (NO_ERROR == nRet)
{
rni = (UNIVERSAL_NAME_INFO)Marshal.PtrToStructure(pBuffer, typeof(UNIVERSAL_NAME_INFO));
uncpath = rni.lpUniversalName;
}
else
{
uncpath = mappedDrive;
}
}
finally
{
if (pBuffer != default(IntPtr))
{
Marshal.FreeHGlobal(pBuffer);
}
}
}
System.Uri uri = new Uri(uncpath);
if (uri.IsUnc)
{
System.Net.IPAddress[] ipaddresses = System.Net.Dns.GetHostAddresses(uri.DnsSafeHost);
if (ipaddresses != null && ipaddresses.Count() > 0)
{
uri = new Uri(string.Format(@"\\{0}\{1}", ipaddresses[0], uri.AbsolutePath));
}
}
return(uri.LocalPath);
}
//
//GetUNCPath function
//
static public bool TryGetUNCPath(string mappedDrive, out string UNCPath)
{
UNCPath = "";
UNIVERSAL_NAME_INFO rni = new UNIVERSAL_NAME_INFO();
int bufferSize = Marshal.SizeOf(rni);
int nRet = WNetGetUniversalName(
mappedDrive, UNIVERSAL_NAME_INFO_LEVEL,
ref rni, ref bufferSize);
if (ERROR_MORE_DATA == nRet)
{
IntPtr pBuffer = Marshal.AllocHGlobal(bufferSize);;
try
{
nRet = WNetGetUniversalName(mappedDrive, 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:
UNCPath = rni.lpUniversalName;
return(true);
case ERROR_NOT_CONNECTED:
//Local file-name
return(false);
default:
return(false);
}
}
//
//GetUNCPath function
//
public static string GetUNCPath(string mappedDrive)
{
string uncpath = mappedDrive;
UNIVERSAL_NAME_INFO rni = new UNIVERSAL_NAME_INFO();
int bufferSize = Marshal.SizeOf(rni);
int nRet = WNetGetUniversalName(mappedDrive, UNIVERSAL_NAME_INFO_LEVEL, ref rni, ref bufferSize);
if (ERROR_MORE_DATA == nRet)
{
IntPtr pBuffer = default(IntPtr);
try
{
pBuffer = Marshal.AllocHGlobal(bufferSize);
nRet = WNetGetUniversalName(mappedDrive, UNIVERSAL_NAME_INFO_LEVEL, pBuffer, ref bufferSize);
if (NO_ERROR == nRet)
{
rni = (UNIVERSAL_NAME_INFO)Marshal.PtrToStructure(pBuffer, typeof(UNIVERSAL_NAME_INFO));
uncpath = rni.lpUniversalName;
}
else
uncpath = mappedDrive;
}
finally
{
if (pBuffer != default(IntPtr))
Marshal.FreeHGlobal(pBuffer);
}
}
System.Uri uri = new Uri(uncpath);
if (uri.IsUnc)
{
System.Net.IPAddress[] ipaddresses = System.Net.Dns.GetHostAddresses(uri.DnsSafeHost);
if (ipaddresses != null && ipaddresses.Count() > 0)
uri = new Uri(string.Format(@"\\{0}\{1}", ipaddresses[0], uri.AbsolutePath));
}
return uri.LocalPath;
}
public static string GetUNCPath(string mappedDrive)
{
UNIVERSAL_NAME_INFO rni = new UNIVERSAL_NAME_INFO();
int bufferSize = Marshal.SizeOf(rni);
int nRet = WNetGetUniversalName(mappedDrive, UNIVERSAL_NAME_INFO_LEVEL, ref rni, ref bufferSize);
if (ERROR_MORE_DATA == nRet)
{
IntPtr pBuffer = Marshal.AllocHGlobal(bufferSize);
try
{
nRet = WNetGetUniversalName(mappedDrive, 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:
return mappedDrive;
default:
return mappedDrive;
}
}
protected static extern int WNetGetUniversalName(string lpLocalPath,
int dwInfoLevel, ref UNIVERSAL_NAME_INFO lpBuffer, ref int lpBufferSize);
private static extern int WNetGetUniversalName (string lpLocalPath, int dwInfoLevel, ref UNIVERSAL_NAME_INFO lpBuffer, ref int lpBufferSize );
/// <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)
{
Share 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:
Console.WriteLine("Unknown return value: {0}", nRet);
return(string.Empty);
}
}
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;
}
}
/// <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
NetShareCollection shi = LocalNetShares;
if (null != shi)
{
NetShare 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:
Console.WriteLine("Unknown return value: {0}", nRet);
return string.Empty;
}
}
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);
}
}