如何设置 CFileDialog 的默认文件类型？

发布于 2024-10-13 11:42:09 字数 471 浏览 6 评论 0原文

我正在使用 CFileDialog 来显示打开的文件对话框。我已按如下方式设置过滤器：

static TCHAR BASED_CODE szFilter[] = _T("Chart Files (*.xlc)|*.xlc|")
                                     _T("Worksheet Files (*.xls)|*.xls|Data Files (*.xlc;*.xls)|")
                                     _T("*.xlc; *.xls|All Files (*.*)|*.*||");

每当我 DoModal 对话框时，我都需要将默认文件类型设置为“工作表文件”。我不知道该怎么做。 MS Paint 正在做的事情是，当我们打开打开文件对话框时，它会选择“所有图片文件”。

请让我知道该怎么做。

原文

I am using CFileDialog for displaying the open file dialog. I have set the filter as follows:

static TCHAR BASED_CODE szFilter[] = _T("Chart Files (*.xlc)|*.xlc|")
                                     _T("Worksheet Files (*.xls)|*.xls|Data Files (*.xlc;*.xls)|")
                                     _T("*.xlc; *.xls|All Files (*.*)|*.*||");

I need to set the default file type to be "Worksheet Files" whenever I DoModal the dialog box. I am unable to figure out how to do it. MS Paint is doing, it selects the "All Picture files" when we open the open file dialog.

Please let me know how to do it.

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清君侧 2024-10-20 11:42:09

您正在寻找SetDefExt函数< /a>. 这允许您指定打开/保存文件对话框的默认文件扩展名。请记住，您指定的字符串不应包含句点 (.)。

当然，您也可以在构造函数中指定它。第二个参数是默认扩展名 (lpszDefExt)。

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疯到世界奔溃 2024-10-20 11:42:09

你应该读和写
这段代码将在程序运行时完成这项工作。为了能够在下次运行程序时显示上次使用的选择，您可以将 LastIndex 的值存储在注册表中。

// A dialog box with several filters for various media file types
static int LastIndex = -1;          // Holds the last used filter. You can store it in the Registry to use it during next run.

const TCHAR szFilter[] = _T("Video Files (*.mpg, *.mov, *.mp4)|*.mpg;*.mov;*.mp4|Audio Files (*.wav, *.mp3, *.m4a, *.flac)|*.wav;*.mp3;*.m4a;*.flac|MXF Files (*.mxf)|*.mxf|All Files (*.*)|*.*||");

CFileDialog dlg(TRUE, _T("Select Media File"), NULL, OFN_HIDEREADONLY | OFN_FILEMUSTEXIST, szFilter, this);

if(LastIndex != -1) dlg.m_ofn.nFilterIndex = LastIndex; // restore last used index 
                                                        // from last time

if (dlg.DoModal() == IDOK)
{
    LastIndex = dlg.m_ofn.nFilterIndex; // Store last used index for next time
    CString sFilePath = dlg.GetPathName();
}

You should read and write
This code will do the job during the run time of your program. To be able to display the last used selection next time you run your program, you can store the value of LastIndex in the Registry.

// A dialog box with several filters for various media file types
static int LastIndex = -1;          // Holds the last used filter. You can store it in the Registry to use it during next run.

const TCHAR szFilter[] = _T("Video Files (*.mpg, *.mov, *.mp4)|*.mpg;*.mov;*.mp4|Audio Files (*.wav, *.mp3, *.m4a, *.flac)|*.wav;*.mp3;*.m4a;*.flac|MXF Files (*.mxf)|*.mxf|All Files (*.*)|*.*||");

CFileDialog dlg(TRUE, _T("Select Media File"), NULL, OFN_HIDEREADONLY | OFN_FILEMUSTEXIST, szFilter, this);

if(LastIndex != -1) dlg.m_ofn.nFilterIndex = LastIndex; // restore last used index 
                                                        // from last time

if (dlg.DoModal() == IDOK)
{
    LastIndex = dlg.m_ofn.nFilterIndex; // Store last used index for next time
    CString sFilePath = dlg.GetPathName();
}

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