async Task <string[]> Show(SystemDialog d, Window parent, ManagedFileDialogOptions options = null)
            {
                var model = new ManagedFileChooserViewModel((FileSystemDialog)d,
                                                            options ?? new ManagedFileDialogOptions());

                var dialog = new T
                {
                    Content     = new ManagedFileChooser(),
                    Title       = d.Title,
                    DataContext = model
                };

                dialog.Closed += delegate { model.Cancel(); };

                string[] result = null;

                model.CompleteRequested += items =>
                {
                    result = items;
                    dialog.Close();
                };

                model.CancelRequested += dialog.Close;

                await dialog.ShowDialog <object>(parent);

                return(result);
            }
 public static Task <string[]> ShowManagedAsync <TWindow>(this OpenFileDialog dialog, Window parent,
                                                          ManagedFileDialogOptions options = null) where TWindow : Window, new()
 {
     return(new ManagedSystemDialogImpl <TWindow>().ShowFileDialogAsync(dialog, parent, options));
 }
 public static Task <string[]> ShowManagedAsync(this OpenFileDialog dialog, Window parent,
                                                ManagedFileDialogOptions options = null) => ShowManagedAsync <Window>(dialog, parent, options);
 public async Task <string[]> ShowFileDialogAsync(FileDialog dialog, Window parent, ManagedFileDialogOptions options)
 {
     return(await Show(dialog, parent, options));
 }
            async Task <string[]> Show(SystemDialog d, Window parent, ManagedFileDialogOptions options = null)
            {
                var model = new ManagedFileChooserViewModel((FileSystemDialog)d,
                                                            options ?? new ManagedFileDialogOptions());

                var dialog = new T
                {
                    Content     = new ManagedFileChooser(),
                    Title       = d.Title,
                    DataContext = model
                };

                dialog.Closed += delegate { model.Cancel(); };

                string[] result = null;

                model.CompleteRequested += items =>
                {
                    result = items;
                    dialog.Close();
                };

                model.OverwritePrompt += async(filename) =>
                {
                    Window overwritePromptDialog = new Window()
                    {
                        Title                 = "Confirm Save As",
                        SizeToContent         = SizeToContent.WidthAndHeight,
                        WindowStartupLocation = WindowStartupLocation.CenterOwner,
                        Padding               = new Thickness(10),
                        MinWidth              = 270
                    };

                    string name = Path.GetFileName(filename);

                    var panel = new DockPanel()
                    {
                        HorizontalAlignment = Layout.HorizontalAlignment.Stretch
                    };

                    var label = new Label()
                    {
                        Content = $"{name} already exists.\nDo you want to replace it?"
                    };

                    panel.Children.Add(label);
                    DockPanel.SetDock(label, Dock.Top);

                    var buttonPanel = new StackPanel()
                    {
                        HorizontalAlignment = Layout.HorizontalAlignment.Right,
                        Orientation         = Layout.Orientation.Horizontal,
                        Spacing             = 10
                    };

                    var button = new Button()
                    {
                        Content             = "Yes",
                        HorizontalAlignment = Layout.HorizontalAlignment.Right
                    };

                    button.Click += (sender, args) =>
                    {
                        result = new string[1] {
                            filename
                        };
                        overwritePromptDialog.Close();
                        dialog.Close();
                    };

                    buttonPanel.Children.Add(button);

                    button = new Button()
                    {
                        Content             = "No",
                        HorizontalAlignment = Layout.HorizontalAlignment.Right
                    };

                    button.Click += (sender, args) =>
                    {
                        overwritePromptDialog.Close();
                    };

                    buttonPanel.Children.Add(button);

                    panel.Children.Add(buttonPanel);
                    DockPanel.SetDock(buttonPanel, Dock.Bottom);

                    overwritePromptDialog.Content = panel;

                    await overwritePromptDialog.ShowDialog(dialog);
                };

                model.CancelRequested += dialog.Close;

                await dialog.ShowDialog <object>(parent);

                return(result);
            }