/// <summary>
/// Exception Mapping
/// </summary>
/// <param name="path"></param>
/// <param name="errorCode">errorCode</param>
public static void NativeExceptionMapping(String path, Int32 errorCode)
{
Contract.Requires(!String.IsNullOrWhiteSpace(path));
if (errorCode == Win32ErrorCodes.ERROR_SUCCESS)
{
return;
}
string affectedPath = path;
// http://msdn.microsoft.com/en-us/library/windows/desktop/ms681382(v=vs.85).aspx
switch (errorCode)
{
case Win32ErrorCodes.ERROR_PATH_NOT_FOUND:
case Win32ErrorCodes.ERROR_FILE_NOT_FOUND:
throw new PathNotFoundException(Win32ErrorCodes.FormatMessage(errorCode), affectedPath);
case Win32ErrorCodes.ERROR_ALREADY_EXISTS:
throw new PathAlreadyExistsException(Win32ErrorCodes.FormatMessage(errorCode), affectedPath);
case Win32ErrorCodes.ERROR_INVALID_NAME:
case Win32ErrorCodes.ERROR_DIRECTORY:
throw new InvalidPathException(Win32ErrorCodes.FormatMessage(errorCode), affectedPath);
case Win32ErrorCodes.ERROR_REM_NOT_LIST:
case Win32ErrorCodes.ERROR_NETWORK_BUSY:
case Win32ErrorCodes.ERROR_BUSY:
case Win32ErrorCodes.ERROR_PATH_BUSY:
throw new FileSystemIsBusyException(Win32ErrorCodes.FormatMessage(errorCode), affectedPath);
case Win32ErrorCodes.ERROR_DIR_NOT_EMPTY:
throw new DirectoryNotEmptyException(Win32ErrorCodes.FormatMessage(errorCode), affectedPath);
case Win32ErrorCodes.ERROR_ACCESS_DENIED:
case Win32ErrorCodes.ERROR_NETWORK_ACCESS_DENIED:
throw new UnauthorizedAccessException("Access to '" + affectedPath + "' denied.", new Win32Exception(errorCode));
case Win32ErrorCodes.ERROR_CURRENT_DIRECTORY:
case Win32ErrorCodes.ERROR_CANNOT_MAKE:
throw new Exception(Win32ErrorCodes.FormatMessage(errorCode) + affectedPath + "'.", new Win32Exception(errorCode));
default:
throw new Exception("Error on '" + affectedPath + "': See InnerException for details.", new Win32Exception(errorCode));
}
}
/// <summary>
/// Moves to next element
/// </summary>
/// <returns></returns>
public bool MoveNext()
{
do
{
// only at start currentFileHandle is null
if (_currentFileHandle == null)
{
// first call
_currentFileHandle = Win32SafeNativeMethods.FindFirstFile(DirectoryPath, _currentFindData);
_currentErrorCode = Marshal.GetLastWin32Error();
}
else
{
// second to n call
_currentFindData = new Win32FindData();
if (!Win32SafeNativeMethods.FindNextFile(_currentFileHandle, _currentFindData))
{
return(false);
}
}
// Take care of invalid handles
if (_currentFileHandle.IsInvalid)
{
if (_currentErrorCode != Win32ErrorCodes.ERROR_NO_MORE_FILES)
{
Win32ErrorCodes.NativeExceptionMapping(DirectoryPath, _currentErrorCode);
}
return(false);
}
// skip entries to ignore
} while(FilterSystemEntries && _currentFindData.IsSystemDirectoryEntry());
return(true);
}