Question

我正在使用Mahapps Metro创建一个WPF项目。

我的问题是我将从DetailPage.xaml框架启动，该框架嵌入在MainWindow.xaml中，等待模式mahapps提供。所以我做了两种打开和关闭的方法，但最后他说不再是对话了。有人有解决方案吗？

我的代码在DetailPage.xaml

帧中

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();
}

MainWindow.xaml（MetroWindow）中的代码

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();
}

我的错误：

Answer 1

这里的问题是你正在做一个＆＃34; Fire and Forget＆＃34; （async void）。换句话说，在showMessaggeAsyncFromMainWindow启动之前致电closeMessaggeAsyncFromMainWindow之后，您正在致电dialog并进行操作。

解决方案：

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

中的代码

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();
}

使用此解决方案，您不会执行＆＃34; Fire and Forget＆＃34;。您正在等待使用await打开和关闭对话框。

快乐编码：）

Answer 2

如果有人想使用对话框的“取消”按钮将其关闭

        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();

这是取消事件

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

ProgressDialogController mahapps，关闭弹出窗口的问题

2 个答案: