CFileDialog打开多个文件失败 返回错误 FNERR_BUFFERTOOSMALL

需要使用CFileDialog，产生一个文件多选的对话框。但是默认的lpstrFile缓冲区只有200多,当打开比较多的文件时容易超过缓冲区返回错误：FNERR_BUFFERTOOSMALL 由CommDlgExtendedError()返回。

查看MSDN解释：

ValueMeaningFNERR_BUFFERTOOSMALLThe buffer pointed to by the lpstrFile member of the OPENFILENAME structure is too small for the filename specified by the user. The first two bytes of the lpstrFile buffer contain an integer value specifying the size, in bytes (ANSI version) or 16-bit characters (Unicode version), required to receive the full name.

 

那就手动将缓冲区设置大一点即可。缓冲区的上限是2562。看下面示例：

char* lpFile; CFileDialog FileDlg(TRUE,NULL,NULL,NULL, "Media Files (*.avi;*.mkv)|*.avi;*.mkv|All Files (*.*)|*.*||"); FileDlg.m_ofn.nMaxFile=2562; lpFile=new char[2562]; FileDlg.m_ofn.lpstrFile=lpFile; FileDlg.m_ofn.lpstrFile[0]=NULL; FileDlg.m_ofn.Flags |= OFN_ALLOWMULTISELECT | OFN_EXPLORER; //设置可多选文件标志 FileDlg.m_ofn.lStructSize=88; //设置EXPLORER风格 if (FileDlg.DoModal()==IDOK) { CString strFilePath=""; POSITION p=FileDlg.GetStartPosition(); while (p) { strFilePath=FileDlg.GetNextPathName(p); //处理每个文件路径 } } delete[] lpFile;

 

 

还可以参考codeproject上的实例代码：

链接：http://www.codeproject.com/KB/dialog/pja_multiselect.aspx