CFileDialog的各种风格的目录/文件夹选择对话框---（CFolderDialog）

1. 标准的文件夹选择对话框：可以使用在非MFC程序中，调用的标准API SHBrowserForFolder。
源码：
[cpp]
#include "shlobj.h"
#include <STRING>

// Function name    : GetFolder
// Description      : Open and get Folder Dialog.
// Return type      : true means click ok, false mean no select and cancel.
// Argument         : folder path reference
// Argument         : dialog window caption
// Argument         : parent window handle
bool GetFolder(std::string& folderpath, const char* szCaption = NULL, HWND hOwner = NULL)
{
    bool retVal = false;

    // The BROWSEINFO struct tells the shell
    // how it should display the dialog.
    BROWSEINFO bi;
    memset(&bi, 0, sizeof(bi));
    bi.ulFlags   = BIF_USENEWUI;
    bi.hwndOwner = hOwner;
    bi.lpszTitle = szCaption;

    // must call this if using BIF_USENEWUI
    ::OleInitialize(NULL);

    // Show the dialog and get the itemIDList for the selected folder.
    LPITEMIDLIST pIDL = ::SHBrowseForFolder(&bi);

    if(pIDL != NULL)
    {
        // Create a buffer to store the path, then get the path.
        char buffer[_MAX_PATH] = {'\0'};
        if(::SHGetPathFromIDList(pIDL, buffer) != 0)
        {
            // Set the string value.
            folderpath = buffer;
            retVal = true;
        }

        // free the item id list
        CoTaskMemFree(pIDL);
    }

    ::OleUninitialize();

    return retVal;
}

调用：
[cpp]
std::string szPath("");

if (GetFolder(szPath, "Select a folder.") == true)
{
    printf("You selected: \"%s\".\n", szPath.c_str());
}
else
{
    printf("No folder selected!\n");
}

界面：

2. 带导航栏的文件夹选择对话框：只在MFC程序中使用，从MFC的CFileDialog派生。

源码-头文件-Folder_dialog.h：

[cpp]print?#pragma once

// CFolderDialog dialog
class CFolderDialog : public CFileDialog
{
    DECLARE_DYNAMIC(CFolderDialog)

public:
    CFolderDialog(CString* pPath, CWnd* pParentWnd = NULL);
    static WNDPROC m_wndProc;
    CString* m_pPath;

protected:
    DECLARE_MESSAGE_MAP()

private:
    virtual void OnInitDone();
    virtual void OnFileNameChange();
    virtual void OnFolderChange();
    void ChangeFolder();
};
#pragma once

// CFolderDialog dialog
class CFolderDialog : public CFileDialog
{
    DECLARE_DYNAMIC(CFolderDialog)

public:
    CFolderDialog(CString* pPath, CWnd* pParentWnd = NULL);
    static WNDPROC m_wndProc;
    CString* m_pPath;

protected:
    DECLARE_MESSAGE_MAP()

private:
    virtual void OnInitDone();
    virtual void OnFileNameChange();
    virtual void OnFolderChange();
    void ChangeFolder();
};
源码-Folder_dialog.cpp:

[cpp]print?#include "stdafx.h"
#include "folder_dialog.h"
#include <DLGS.H>
#include <WINUSER.H>

#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif

// CFolderDialog
IMPLEMENT_DYNAMIC(CFolderDialog, CFileDialog)

WNDPROC CFolderDialog::m_wndProc = NULL;

// Function name    : CFolderDialog::CFolderDialog
// Description      : Constructor
// Return type      :
// Argument         : CString* pPath ; represent string where selected folder wil be saved
CFolderDialog::CFolderDialog(CString* pPath, CWnd* pParentWnd) : CFileDialog(true, NULL, _T("*..*"), 6UL, NULL, pParentWnd)
{
    m_pPath = pPath;
}

BEGIN_MESSAGE_MAP(CFolderDialog, CFileDialog)
END_MESSAGE_MAP()

// Function name    : WindowProcNew
// Description      : Call this function when user navigate into CFileDialog.
// Return type  &n

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