CFileDialog多選檔案的最大數量

2022-04-04 01:27:50 字數 1344 閱讀 2983

cfiledialog這個類用來選擇檔案不錯,不過針對多選,預設的最**擇檔案數量有限,它的最大字串緩衝大小僅有260,這時候需要對它的資料成員m_ofn進理處理,如下**所示:

dword nfilenumbers = 500;    //


cfiledialog最**擇檔案數量


cfiledialog filedlg(true,


_t("txt


"), 


_t("*.txt"),


ofn_filemustexist | ofn_hidereadonly |ofn_allowmultiselect,


text(


"檔案 (*.txt)|*.txt|all files (*.*)|*.*||"),


this


); position pos = 0


; cstring strfile;


tchar *pbufold = filedlg.m_ofn.lpstrfile; //


儲存舊的指標


dword dwmaxold = filedlg.m_ofn.nmaxfile; //


儲存舊的數量


filedlg.m_ofn.lpstrfile = new tchar[ nfilenumbers *max_path];


zeromemory(filedlg.m_ofn.lpstrfile,


sizeof(tchar) * nfilenumbers *max_path);


filedlg.m_ofn.nmaxfile = nfilenumbers * max_path; //


此最大數,按msdn解釋為filedlg.m_ofn.lpstrfile指向的緩衝的最大字元數


//預設是260 


if (idok != filedlg.domodal()) goto


exit_onbnclickedcreatebatch;


pos =filedlg.getstartposition();


while


(pos)


exit_onbnclickedcreatebatch:


delete (filedlg.m_ofn.lpstrfile); 


//清除堆記憶體


filedlg.m_ofn.lpstrfile = pbufold; //


還原之前的指標,因為沒有深入過cfiledialog原始碼分析,不清這個是否必須的,還是先還原上吧,


//說不定cfiledialog析構的時候要用上


filedlg.m_ofn.nmaxfile = dwmaxold; //


還原之前的最大數

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