ProgressDialogController mahapps，關閉彈出窗口的問題

Question

我正在使用 Mahapps Metro 創建一個 WPF 項目。

我的問題是我將從 DetailPage.xaml 框架啟動，它嵌入在 MainWindow.xaml 中，等待模式 mahapps 提供。 所以我做了兩種打開和關閉的方法，但最后他說那不再是對話框。 有沒有人有解決方案？

我在框架DetailPage.xaml代碼

private void Meeting_Click(object sender, RoutedEventArgs e)
{
    MainWindow w = (MainWindow)App.Current.MainWindow;
    w.showMessaggeAsyncFromMainWindow();


    var MIDClick = sender as Button;
    String MID = MIDClick.Tag as String;

    ...mycode...                

    w.closeMessaggeAsyncFromMainWindow();
}

我在MainWindow.xaml代碼（MetroWindow）

public ProgressDialogController dialog;

public async void showMessaggeAsyncFromMainWindow()
{
    dialog = await this.ShowProgressAsync(Properties.strings.attendi, Properties.strings.aggiornamentoMeetingsInCorso, false) as ProgressDialogController;
}

public async void closeMessaggeAsyncFromMainWindow()
{
    await dialog.CloseAsync();
}

我的錯誤：

Answer 1

這里的問題是您正在執行“即發即棄”（ async void ）。 換句話說，您在啟動dialog之前調用closeMessaggeAsyncFromMainWindow之后調用showMessaggeAsyncFromMainWindow和 rigth。

解決方案 ：

private async void Meeting_Click(object sender, RoutedEventArgs e)
{
    MainWindow w = (MainWindow)App.Current.MainWindow;
    await w.showMessaggeAsyncFromMainWindow();


    var MIDClick = sender as Button;
    String MID = MIDClick.Tag as String;

    ...mycode...                

    await w.closeMessaggeAsyncFromMainWindow();
}

MainWindow.xaml的代碼

public ProgressDialogController dialog;

public async Task showMessaggeAsyncFromMainWindow()
{
    dialog = await this.ShowProgressAsync(Properties.strings.attendi, Properties.strings.aggiornamentoMeetingsInCorso, false) as ProgressDialogController;
}

public async Task closeMessaggeAsyncFromMainWindow()
{
    await dialog.CloseAsync();
}

使用此解決方案，您不會執行“即發即忘”。 您正在等待對話框使用await打開和關閉。

快樂編碼:)

Answer 2

如果有人想使用對話框取消按鈕關閉它

        var settings = new MetroDialogSettings()
        {

            NegativeButtonText = "cancel",
            DialogMessageFontSize = 25,
            DialogTitleFontSize = 25,
            DialogResultOnCancel = MessageDialogResult.Canceled,

        };
        ProgressDialogController controller =
                await this.ShowProgressAsync("Title", "Message", true, settings);
        controller.SetCancelable(true);

        controller.Canceled += controller_Canceled;

        //after your job

        if(controller.IsOpen)
             await controller.CloseAsync();

這是取消事件

    private async void controller_Canceled(object sender, EventArgs e)
    {
        ProgressDialogController controller_ = (ProgressDialogController)sender;
        await controller_.CloseAsync();
    }