通過瀏覽器瀏覽器選擇預覽檔案儲存路徑

在工作中遇到這個需求，需要選擇檔案的儲存這裡我列舉兩種方法供大家參考：

1、通過SHBrowseForFolder實現具體程式碼和講解如下：

wchar_t szPath[MAX_PATH];     //存放選擇的目錄路徑 
		ZeroMemory(szPath, sizeof(szPath));
	
		BROWSEINFO bi;
		memset(&bi, 0, sizeof(BROWSEINFO));
		DWORD dwPid = GetPidByProcessName(_T("firefox.exe"));//這個更具不用設定不同父類控制代碼，我不想在工作列中顯示出來，所以我把他的父類控制代碼設定稱瀏覽器
		HWND hWnd = GetHwndByPid(dwPid);
		bi.hwndOwner = hWnd;
		bi.pidlRoot = NULL;
		bi.pszDisplayName =szPath;
		bi.lpszTitle = L"儲存的目錄：";
		bi.ulFlags = 0;
		bi.lpfn = NULL;
		bi.lParam = 0;
		bi.iImage = 0;
		LPITEMIDLIST lp = SHBrowseForFolder(&bi);
if (lp)
		{
			bool list = SHGetPathFromIDList(lp, szPath);
			//開啟成功
			
		}
		else
		{
			//開啟失敗
		}
 

OPENFILENAMEW openFile;
			memset(&openFile, 0, sizeof(openFile));
			openFile.lStructSize = sizeof(openFile);

			wchar_t    szFileName[MAX_PATH] = { 0 };
			OPENFILENAME openFileName = { 0 };
			openFile.lStructSize = sizeof(OPENFILENAME);
			openFile.nMaxFile = MAX_PATH;
			openFile.lpstrFilter = L"資料夾\0..\0\0";
			openFile.lpstrFile = szFileName;
			openFile.nFilterIndex = 1;
			openFile.Flags = OFN_EXPLORER
			| OFN_PATHMUSTEXIST
			| OFN_ENABLEHOOK
			| OFN_HIDEREADONLY
			| OFN_CREATEPROMPT
			| OFN_SHAREAWARE
			| OFN_ENABLESIZING;
			openFile.hInstance = (HMODULE)GetCurrentProcess();
			openFile.lpfnHook = MyFolderProc;
			
			if (GetOpenFileName(&openFile))
			{
			strDir = wstring2string(szFileName);
			}
			else
			{

			DWORD ret = CommDlgExtendedError();
			strDir = str;
			}
 

LRESULT static __stdcall  _WndProc(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
{
	switch (uMsg)
	{
	case WM_COMMAND:
	{
		if (wParam == IDOK)
		{
			wchar_t wcDirPath[MAX_PATH] = { 0 };
			HWND hComboAddr = GetDlgItem(hwnd, ID_COMBO_ADDR);
			if (hComboAddr != NULL)
			{
				GetWindowText(hComboAddr, wcDirPath, MAX_PATH);
			}
			if (!wcslen(wcDirPath))
			{
				break;
			}
			DWORD dwAttr = GetFileAttributes(wcDirPath);
			if (dwAttr != -1 && (FILE_ATTRIBUTE_DIRECTORY & dwAttr))
			{
				LPOPENFILENAMEW oFn = (LPOPENFILENAME)GetProp(hwnd, L"OPENFILENAME");
				if (oFn)
				{
					int size = oFn->nMaxFile > MAX_PATH ? MAX_PATH : oFn->nMaxFile;
					memcpy(oFn->lpstrFile, wcDirPath, size * sizeof(wchar_t));
					RemoveProp(hwnd, L"OPENFILENAME");
					EndDialog(hwnd, 1);
				}
				else
				{
					EndDialog(hwnd, 0);
				}
			}
			break;
		}
		//////////////////////////////////////////////////////////////////////////
		//如果是左邊toolbar發出的WM_COMMOND訊息（即點選左邊的toolbar）, 則清空OK按鈕旁的組合框。
		HWND hCtrl = (HWND)lParam;
		if (hCtrl == NULL)
		{
			break;
		}
		int ctrlId = GetDlgCtrlID(hCtrl);
		if (ctrlId == ID_LEFT_TOOBAR)
		{
			HWND hComboAddr = GetDlgItem(hwnd, ID_COMBO_ADDR);
			if (hComboAddr != NULL)
			{
				SetWindowTextW(hComboAddr, L"");
			}
		}
	}
	break;
	}
	int i = CallWindowProc((WNDPROC)g_lOriWndProc, hwnd, uMsg, wParam, lParam);
	return i;
}
UINT_PTR static __stdcall  MyFolderProc(HWND hdlg, UINT uiMsg, WPARAM wParam, LPARAM lParam)
{
	//參考reactos可知，hdlg 是一個隱藏的對話方塊，其父視窗為開啟檔案對話方塊， OK，CANCEL按鈕等控制元件的訊息在父視窗處理。
	LogInfo("MyFolderProc\n");
	if (uiMsg == WM_NOTIFY)
	{
		LPOFNOTIFY lpOfNotify = (LPOFNOTIFY)lParam;
		if (lpOfNotify->hdr.code == CDN_INITDONE)
		{
			SetPropW(GetParent(hdlg), L"OPENFILENAME", (HANDLE)(lpOfNotify->lpOFN));
			g_lOriWndProc = ::SetWindowLongW(::GetParent(hdlg), GWL_WNDPROC, (LONG)_WndProc);
		}
		if (lpOfNotify->hdr.code == CDN_SELCHANGE)
		{
			wchar_t wcDirPath[MAX_PATH] = { 0 };
			CommDlg_OpenSave_GetFilePathW(GetParent(hdlg), wcDirPath, sizeof(wcDirPath));
			HWND hComboAddr = GetDlgItem(GetParent(hdlg), ID_COMBO_ADDR);
			if (hComboAddr != NULL)
			{
				if (wcslen(wcDirPath))
				{
					//去掉資料夾快捷方式的字尾名。
					int pathSize = wcslen(wcDirPath);
					if (pathSize >= 4)
					{
						wchar_t* wcExtension = PathFindExtensionW(wcDirPath);
						if (wcslen(wcExtension))
						{
							wcExtension = CharLowerW(wcExtension);
							if (!wcscmp(wcExtension, L".lnk"))
							{
								wcDirPath[pathSize - 4] = L'\0';
							}
						}
					}

					SetWindowTextW(hComboAddr, wcDirPath);
				}
				else
				{
					SetWindowTextW(hComboAddr, L"");
				}
			}
		}
	}
	return 1;
}