MFC打开文件夹对话框 [英] MFC Open Folder Dialog

问题描述

在MFC中，是否有一个打开文件夹"对话框?也就是说，不是选择文件名，而是选择文件夹名称?理想情况下，我希望它成为Visual Studio在导航项目位置"(创建新项目时)时所采用的方式，该外观非常类似于普通的文件对话框.但我可以使用垂直树之一的接口如果前者不存在.

In MFC, is there an Open Folder Dialog? That is, rather than choosing a filename, it chooses a folder name? Ideally, I'd like it to be the way Visual Studio does it when navigating for a "Project Location" (when creating a new project), which looks very much like a normal file dialog. But I could make do with one of the vertical tree sort of interfaces if the former doesn't exist.

推荐答案

此代码将为您提供一个打开的文件夹对话框(该对话框是从网络上的某个地方获取的，但我真的不知道在哪里).

This code will get you a open folder dialog (this was taken from somewhere on the web but I don't really know where).

CString szSelectedFolder = _T("");

// This is the recommended way to select a directory
// in Win95 and NT4.
BROWSEINFO bi;
memset((LPVOID)&bi, 0, sizeof(bi));
TCHAR szDisplayName[_MAX_PATH];
szDisplayName[0] = '\0';
bi.hwndOwner = GetSafeHwnd();
bi.pidlRoot = NULL;
bi.pszDisplayName = szDisplayName;
bi.lpszTitle = _T("Select a folder");
bi.ulFlags = BIF_RETURNONLYFSDIRS;
// Set the callback function
bi.lpfn = BrowseCallbackProc;

LPITEMIDLIST pIIL = ::SHBrowseForFolder(&bi);
TCHAR szReturnedDir[_MAX_PATH];

BOOL bRet = ::SHGetPathFromIDList(pIIL, (TCHAR*)&szReturnedDir);
if (bRet)
{
    if (szReturnedDir != _T(""))
    {
        szSelectedFolder = szReturnedDir;
    }

    LPMALLOC pMalloc;
    HRESULT HR = SHGetMalloc(&pMalloc);
    pMalloc->Free(pIIL);
    pMalloc->Release();
}

您还必须实现此回调函数:

you'll also have to implement this callback function:

TCHAR szInitialDir[_MAX_PATH];

// Set the initial path of the folder browser
int CALLBACK BrowseCallbackProc(HWND hWnd, UINT uMsg, LPARAM lParam, LPARAM lpData)
{
    // Look for BFFM_INITIALIZED
    if (uMsg == BFFM_INITIALIZED)
    {
        SendMessage(hWnd, BFFM_SETSELECTION, TRUE, (LPARAM)szInitialDir);
    }
    return 0;
}

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