/// <summary>
///
/// </summary>
/// <param name="targetDirectory">標的目錄</param>
/// <param name="extensionFilters">副檔名過濾</param>
/// <param name="realtimeActionWhenFind">發現檔案時, 即時執行項目 (避免掃描回傳時間過久, 可以在發現檔案的第一時間執行)</param>
/// <returns></returns>
private IList <string> RecursiveScan(
string targetDirectory,
string[] extensionFilters = null,
Action <string> realtimeActionWhenFind = null,
Action <string> whenEnterNewDir = null)
{
IntPtr INVALID_HANDLE_VALUE = new IntPtr(-1);
WinApi.WIN32_FIND_DATAW findData;
IntPtr findHandle = INVALID_HANDLE_VALUE;
//檢查目錄前, 通常用於外部呼叫者定義顯示掃目錄
//於console 中顯示掃描目錄
if (whenEnterNewDir != null)
{
whenEnterNewDir(targetDirectory);
}
var info = new List <string>();
try
{
findHandle = WinApi.FindFirstFileW(targetDirectory + @"\*", out findData);
if (findHandle != INVALID_HANDLE_VALUE)
{
do
{
if (findData.cFileName == "." || findData.cFileName == "..")
{
continue;
}
string fullpath = targetDirectory + (targetDirectory.EndsWith("\\") ? "" : "\\") + findData.cFileName;
if ((findData.dwFileAttributes & System.IO.FileAttributes.Directory) != 0)
{
//為目錄時遞迴
info.AddRange(RecursiveScan(fullpath, extensionFilters, realtimeActionWhenFind, whenEnterNewDir));
}
else
{
var extension = ZlpPathHelper.GetExtension(fullpath);
//副檔名過濾 (前一個方法已全部轉小寫, 故此處以小寫比對)
if (extensionFilters != null &&
ZlpPathHelper.GetExtension(fullpath).ToLower().NotIn(extensionFilters))
{
continue;
}
//取得完整路徑 (使用 ZlpPathHelper 避免路徑過長)
var fileFullPath = ZlpPathHelper.GetFullPath(fullpath);
//執行即時Action (exception 外層自己控制)
if (realtimeActionWhenFind != null)
{
realtimeActionWhenFind(fileFullPath);
}
info.Add(fileFullPath);
}
}while (WinApi.FindNextFile(findHandle, out findData));
}
}
finally
{
if (findHandle != INVALID_HANDLE_VALUE)
{
WinApi.FindClose(findHandle);
}
}
return(info);
}