public void Dispose()
{
if (this._hFind != FileHelperWinAPI.INVALID_HANDLE_VALUE)
{
FileHelperWinAPI.FindClose(this._hFind); this._hFind = FileHelperWinAPI.INVALID_HANDLE_VALUE;
}
}
/// <summary>
/// Checks if a folder is Empty. It will throw an exception if the folder does not exist.
/// </summary>
public static bool IsDirectoryEmpty_Fast(string path)
{
//Bad path throw exception
if (string.IsNullOrEmpty(path))
{
throw new ArgumentNullException(path);
}
//Get out if the folder is missing
if (!Directory.Exists(path))
{
throw new DirectoryNotFoundException();
}
//Fix up the path for searching
if (path.EndsWith(Path.DirectorySeparatorChar.ToString()))
{
path += "*";
}
else
{
path += Path.DirectorySeparatorChar + "*";
}
//Data Instance. This gets reused.
WIN32_FIND_DATA findData;
IntPtr hFind = FileHelperWinAPI.INVALID_HANDLE_VALUE;
try
{
//Find the first
hFind = FileHelperWinAPI.FindFirstFile(path, out findData);
if (hFind == FileHelperWinAPI.INVALID_HANDLE_VALUE)
{
throw new Exception("Failed to get directory first file", Marshal.GetExceptionForHR(Marshal.GetHRForLastWin32Error()));
}
bool empty = true;
do
{
//Reject the . and .. directory entries.
if (findData.cFileName != "." && findData.cFileName != "..")
{
empty = false;
}
}while (empty && FileHelperWinAPI.FindNextFile(hFind, out findData));
return(empty);
}
catch (Exception e) { throw e; }
finally { if (hFind != FileHelperWinAPI.INVALID_HANDLE_VALUE)
{
FileHelperWinAPI.FindClose(hFind);
}
}
}
public bool MoveNext()
{
bool result;
if (this._current == null)
{
this._hFind = FileHelperWinAPI.FindFirstFile(this._rootFolder + "\\*", out this._findData);
if (this._hFind == FileHelperWinAPI.INVALID_HANDLE_VALUE)
{
throw new Exception("Failed to get first file in directory: " + this._rootFolder, Marshal.GetExceptionForHR(Marshal.GetHRForLastWin32Error()));
}
result = true;
}
else
{
result = FileHelperWinAPI.FindNextFile(this._hFind, out this._findData);
}
//Get out if there are no files
if (!result)
{
this._current = null; return(result);
}
//Jump over self and parent pointers
while (this._findData.cFileName == "." || this._findData.cFileName == "..")
{
result = FileHelperWinAPI.FindNextFile(this._hFind, out this._findData);
}
//Get out if there are no files
if (!result)
{
this._current = null; return(result);
}
//Form the file or folder name
var temp = Path.Combine(this._rootFolder, this._findData.cFileName);
//Decide what the file system entry is
switch (this._findData.dwFileAttributes)
{
case FileAttributes.FILE_ATTRIBUTE_DIRECTORY: { this._current = new DirectoryInfo(temp); break; }
case FileAttributes.FILE_ATTRIBUTE_NORMAL: { this._current = new FileInfo(temp); break; }
case FileAttributes.FILE_ATTRIBUTE_ARCHIVE: { this._current = new FileInfo(temp); break; }
default: { throw new Exception("Can't determine if this is a folder or a file: " + temp); break; }
}
return(true);
}
private static int CountItems_Fast(string path, uint filter, bool set)
{
int ret = 0;
//Bad path throw exception
if (string.IsNullOrEmpty(path))
{
throw new ArgumentNullException(path);
}
//Get out if the folder is missing
if (!Directory.Exists(path))
{
throw new DirectoryNotFoundException();
}
//Fix up the path for searching
if (path.EndsWith(Path.DirectorySeparatorChar.ToString()))
{
path += "*";
}
else
{
path += Path.DirectorySeparatorChar + "*";
}
//Data Instance. This gets reused.
WIN32_FIND_DATA findData;
IntPtr hFind = FileHelperWinAPI.INVALID_HANDLE_VALUE;
try
{
//Find the first
hFind = FileHelperWinAPI.FindFirstFile(path, out findData);
if (hFind == FileHelperWinAPI.INVALID_HANDLE_VALUE)
{
throw new Exception("Failed to get first file in directory", Marshal.GetExceptionForHR(Marshal.GetHRForLastWin32Error()));
}
do
{
//Special directories
if (findData.cFileName == "." || findData.cFileName == "..")
{
continue;
}
//Filter
if (((findData.dwFileAttributes & filter) != 0) == set)
{
ret++;
}
}while (FileHelperWinAPI.FindNextFile(hFind, out findData));
}
catch (Exception e) { throw e; }
finally { if (hFind != FileHelperWinAPI.INVALID_HANDLE_VALUE)
{
FileHelperWinAPI.FindClose(hFind);
}
}
return(ret);
}