C++ IFileDialog::SetDefaultExtension方法代码示例

/*
	ANT_CANVAS::LOAD_FILE()
	-----------------------
*/
long long ANT_canvas::load_file(void)
{
long long lines;
IFileDialog *pfd = NULL;
IShellItem *psiResult;
DWORD dwFlags;
PWSTR pszFilePath = NULL;
char chosen_filter[1024];
char chosen_filename[MAX_PATH];
OPENFILENAME parameters;

/*
	Create the Open Dialg object IFileDialog
*/
if ((CoCreateInstance(CLSID_FileOpenDialog, NULL, CLSCTX_INPROC_SERVER, IID_PPV_ARGS(&pfd)) == S_OK))
	{
	/*
		we're on VISTA / Windows 7 or later
	*/
	const COMDLG_FILTERSPEC c_rgSaveTypes[] =
	{
	{L"C/C++ files",		L"*.c;*.cxx;*.cpp;*.h;*.hpp.*.hxx;*.mak;makefile"},
	{L"All Documents (*.*)",		L"*.*"}
	};

	pfd->GetOptions(&dwFlags);
	pfd->SetOptions(dwFlags | FOS_FORCEFILESYSTEM);					// we want to see a file
	pfd->SetFileTypes(ARRAYSIZE(c_rgSaveTypes), c_rgSaveTypes);
	pfd->SetFileTypeIndex(1);										// first item in the list is the default
	pfd->SetDefaultExtension(L"doc;docx");
	if (pfd->Show(NULL) == S_OK)
		{
		if (pfd->GetResult(&psiResult) == S_OK)						// get the result object if the user clicks "Open"
			{
			psiResult->GetDisplayName(SIGDN_FILESYSPATH, &pszFilePath);

			lines = file->read_file((char *)pszFilePath);

			CoTaskMemFree(pszFilePath);
			psiResult->Release();
			}
		}
	pfd->Release();

	return lines;
	}
else
	{
	/*
		we're on something prior to VISTA (NT through to XP) so use the old-style common control
	*/
	memset(chosen_filename, 0, sizeof(chosen_filename));

	parameters.lStructSize = sizeof(parameters);
	parameters.hwndOwner = window;
	parameters.hInstance = hInstance;
	parameters.lpstrFilter = L"C/C++ files\0*.c;*.cxx;*.cpp;*.h;*.hpp.*.hxx\0\0\0";
	parameters.lpstrCustomFilter = (LPWSTR)chosen_filter;
	parameters.nMaxCustFilter = sizeof(chosen_filter) - 1;
	parameters.nFilterIndex = 1;
	parameters.lpstrFile = (LPWSTR)chosen_filename;
	parameters.nMaxFile = sizeof(chosen_filename) - 1;
	parameters.lpstrFileTitle = NULL;
	parameters.nMaxFileTitle = 0;
	parameters.lpstrInitialDir = NULL;
	parameters.lpstrTitle = L"Open...";
	parameters.Flags = OFN_LONGNAMES;
	parameters.nFileOffset = 0;
	parameters.nFileExtension = 0;
	parameters.lpstrDefExt = NULL;
	parameters.lCustData = 0;
	parameters.lpfnHook = NULL;
	parameters.lpTemplateName = 0;
	#if (_WIN32_WINNT >= 0x0500)
		parameters.pvReserved = NULL;
		parameters.dwReserved = 0;
		parameters.FlagsEx = 0;
	#endif

	if ((GetOpenFileNameW(&parameters)) != 0)
		return file->read_file((char *)parameters.lpstrFile);
	}

return 0;
}

HRESULT BasicFileOpen(PWSTR* filePath)
{
	// CoCreate the File Open Dialog object.
	IFileDialog *pfd = NULL;
	HRESULT hr = CoCreateInstance(CLSID_FileOpenDialog, 
		NULL, 
		CLSCTX_INPROC_SERVER, 
		IID_PPV_ARGS(&pfd));
	if (SUCCEEDED(hr))
	{
		// Create an event handling object, and hook it up to the dialog.
		IFileDialogEvents *pfde = NULL;
		//DWORD dwCookie;
		// Set the options on the dialog.
		DWORD dwFlags;

		// Before setting, always get the options first in order 
		// not to override existing options.
		hr = pfd->GetOptions(&dwFlags);
		if (SUCCEEDED(hr))
		{
			// In this case, get shell items only for file system items.
			hr = pfd->SetOptions(dwFlags | FOS_FORCEFILESYSTEM);
			if (SUCCEEDED(hr))
			{
				static const COMDLG_FILTERSPEC c_rgSaveTypes[] =
				{
					{L"Executable Files(*.exe)",       L"*.exe"},
				};
				// Set the file types to display only. 
				// Notice that this is a 1-based array.
				hr = pfd->SetFileTypes(ARRAYSIZE(c_rgSaveTypes), c_rgSaveTypes);
				if (SUCCEEDED(hr))
				{
					// Set the selected file type index to Word Docs for this example.
					hr = pfd->SetFileTypeIndex(1);
					if (SUCCEEDED(hr))
					{
						// Set the default extension to be ".doc" file.
						hr = pfd->SetDefaultExtension(L"exe");
						if (SUCCEEDED(hr))
						{
							// Show the dialog
							hr = pfd->Show(g_hwnd);
							if (SUCCEEDED(hr))
							{
								// Obtain the result once the user clicks 
								// the 'Open' button.
								// The result is an IShellItem object.
								IShellItem *psiResult;
								hr = pfd->GetResult(&psiResult);
								if (SUCCEEDED(hr))
								{
									// We are just going to print out the 
									// name of the file for sample sake.
									PWSTR pszFilePath = NULL;
									hr = psiResult->GetDisplayName(SIGDN_FILESYSPATH, 
										&pszFilePath);
									if (SUCCEEDED(hr))
									{
										*filePath=pszFilePath;
										
									}
									psiResult->Release();
								}
							}
						}
					}
				}
			}
		}
		pfd->Release();
	}
	else
	{
		hr=E_OUTOFMEMORY;
		OPENFILENAME ofn;
		LPWSTR pszFile=(LPWSTR)CoTaskMemAlloc(260*2);
		if(pszFile!=NULL)
		{
			memset1(&ofn,0,sizeof(ofn));
			ofn.lStructSize = sizeof(ofn);
			ofn.hwndOwner = g_hwnd;
			ofn.lpstrFile = pszFile;
			// Set lpstrFile[0] to '\0' so that GetOpenFileName does not 
			// use the contents of szFile to initialize itself.
			ofn.lpstrFile[0] = L'\0';
			ofn.nMaxFile = 260;
			ofn.lpstrFilter = L"Executable Files(*.exe)\0*.exe\0";
			ofn.nFilterIndex = 1;
			ofn.lpstrFileTitle = NULL;
			ofn.nMaxFileTitle = 0;
			ofn.lpstrInitialDir = NULL;
			ofn.Flags = OFN_PATHMUSTEXIST | OFN_FILEMUSTEXIST;

			if (GetOpenFileName(&ofn)==TRUE)
			{
				*filePath=pszFile;
				hr=0;
			}
//.........这里部分代码省略.........