C# Don'；t在OpenFileDialog中显示过滤器扩展

为什么不在

OpenFileDialog

中显示过滤器扩展名？我对此进行了测试，但是对话框没有显示

DAT

扩展名。如果我在列表扩展名的第一个中获得

DAT

扩展名，然后在对话框中过滤

OpenFileDialog

。我正在WinXP上使用

C

Application-framework3.5

这是我的密码：

OpenFileDialog openFileDialog = new OpenFileDialog();

string VideoFormat = "Video files |*.wmv; *.3g2; *.3gp; *.3gp2; *.3gpp; *.amv; *.asf;  *.avi; *.bin; *.cue; *.divx; *.dv; *.flv; *.gxf; *.iso; *.m1v; *.m2v; *.m2t; *.m2ts; *.m4v; " +
                          " *.mkv; *.mov; *.mp2; *.mp2v; *.mp4; *.mp4v; *.mpa; *.mpe; *.mpeg; *.mpeg1; *.mpeg2; *.mpeg4; *.mpg; *.mpv2; *.mts; *.nsv; *.nuv; *.ogg; *.ogm; *.ogv; *.ogx; *.ps; *.rec; *.rm; *.rmvb; *.tod; *.ts; *.tts; *.vob; *.vro; *.webm; *.dat; ";


openFileDialog.Filter = VideoFormat;
openFileDialog.ShowDialog();

但此代码在对话框中过滤了DAT扩展名：

OpenFileDialog openFileDialog = new OpenFileDialog();

            string VideoFormat = "Video files | *.dat; *.wmv; *.3g2; *.3gp; *.3gp2; *.3gpp; *.amv; *.asf;  *.avi; *.bin; *.cue; *.divx; *.dv; *.flv; *.gxf; *.iso; *.m1v; *.m2v; *.m2t; *.m2ts; *.m4v; " +
                      " *.mkv; *.mov; *.mp2; *.mp2v; *.mp4; *.mp4v; *.mpa; *.mpe; *.mpeg; *.mpeg1; *.mpeg2; *.mpeg4; *.mpg; *.mpv2; *.mts; *.nsv; *.nuv; *.ogg; *.ogm; *.ogv; *.ogx; *.ps; *.rec; *.rm; *.rmvb; *.tod; *.ts; *.tts; *.vob; *.vro; *.webm; ";


openFileDialog.Filter = VideoFormat;
openFileDialog.ShowDialog();

---

这是

OpenFileDialog

对象的过滤器属性的正确格式：

(*.jpg)|*.jpg|Image Files (*.png)|*.png|Image Files (*.jpeg)|*.jpeg

试试这个：

        OpenFileDialog openFileDialog = new OpenFileDialog();
        string formats = "*.dat; *.wmv; *.3g2; *.3gp; *.3gp2; *.3gpp; *.amv; *.asf;  *.avi; *.bin; *.cue; *.divx; *.dv; *.flv; *.gxf; *.iso; *.m1v; *.m2v; *.m2t; *.m2ts; *.m4v; " +
                  " *.mkv; *.mov; *.mp2; *.mp2v; *.mp4; *.mp4v; *.mpa; *.mpe; *.mpeg; *.mpeg1; *.mpeg2; *.mpeg4; *.mpg; *.mpv2; *.mts; *.nsv; *.nuv; *.ogg; *.ogm; *.ogv; *.ogx; *.ps; *.rec; *.rm; *.rmvb; *.tod; *.ts; *.tts; *.vob; *.vro; *.webm";

        string[] exts = formats.Split(';');
        string filter = string.Empty;
        foreach (string ext in exts)
        {

                filter += "Video Files (" + ext.Replace("*", "").Trim() + ")|" + ext + "|";
        }

        openFileDialog.Filter = filter.Remove(filter.Length-1,1);
        openFileDialog.ShowDialog();

更新

此选项仅显示一个选项，但允许您选择所有视频类型：

        OpenFileDialog openFileDialog = new OpenFileDialog();
        string formats = "All Videos Files |*.dat; *.wmv; *.3g2; *.3gp; *.3gp2; *.3gpp; *.amv; *.asf;  *.avi; *.bin; *.cue; *.divx; *.dv; *.flv; *.gxf; *.iso; *.m1v; *.m2v; *.m2t; *.m2ts; *.m4v; " +
                  " *.mkv; *.mov; *.mp2; *.mp2v; *.mp4; *.mp4v; *.mpa; *.mpe; *.mpeg; *.mpeg1; *.mpeg2; *.mpeg4; *.mpg; *.mpv2; *.mts; *.nsv; *.nuv; *.ogg; *.ogm; *.ogv; *.ogx; *.ps; *.rec; *.rm; *.rmvb; *.tod; *.ts; *.tts; *.vob; *.vro; *.webm";

        openFileDialog.Filter = formats;
        openFileDialog.ShowDialog();

---

它必须是完全一样的。

所以，我希望所有的扩展名都在一个文件类型类别“视频文件”下，而不是像：（.jpg）|.jpg，（.png）|.png，…这样的拆分类别中。进行了另一次更新，这将只显示一个选项，但让您选择所有的过滤器。好的，很好，这是我的目标。非常感谢。再次不要筛选上一个扩展名（在本例中：>*.webm）…我刚刚尝试了我的上一个更新，它确实向我显示了webm文件。一定要像我一样拥有它。