IFileDialog 覆盖文件并打开文件夹/文件

Question

I have two issues related to IFileSaveDialog & IFileOpenDialog I did not managed to find a solution for, I hope you can help me.

1. When the user is saving a file with an existing name, the "Confirm Save As" prompt appears. I need the "Yes" option to be marked as default instead of "No".

2. The User can open/load a file or a folder from the same dialog.

Can these be done with this API? Or maybe other API?

I tried to google it and go over Microsoft documentation to find a solution, but with no luck.

Answer 1

1. When the user is saving a file with an existing name, the "Confirm Save As" prompt appears. I need the "Yes" option to be marked as default instead of "No".

As @Remy Lebeau said that, you can use IFileDialogEvents::OnOverwrite method. And use MessageBox to create a suitable dialog.

Some code:

 IFACEMETHODIMP OnOverwrite(IFileDialog* , IShellItem*psi, FDE_OVERWRITE_RESPONSE* response) {  
        int msgboxID = MessageBox(
            NULL,
            (LPCWSTR)L"Windows already exists,                 \n\rDo you want to replace it?",
            (LPCWSTR)L"Confirm Save As",
            MB_ICONWARNING | MB_YESNO | MB_DEFBUTTON1
        );

        switch (msgboxID)
        {
        case IDYES:
            *response = FDEOR_ACCEPT;
            break;
        case IDNO:
            *response = FDEOR_REFUSE;
            break;  
        } 
        return S_OK; 
    }

Debug:

The User can open/load a file or a folder from the same dialog. Can these be done with this API? Or maybe other API?

There is no such method in the document, you can only select a folder or file.

As a compromise, I suggest that you can create a new MessageBox and set two buttons in it, namely "select folders" and "select files". When the user selects folders, folder dialog with the FOS_PICKFOLDERS style is opened. Otherwise, Files is selected by default.