WinUI 3 UWP -对话框

Question

我正在WinUI3 UWP中为Windows11开发一个新的应用程序，我希望显示一个对话框来提供一个安全的操作，如下面的Microsoft：https://learn.microsoft.com/en-us/windows/apps/design/controls/dialogs-and-flyouts/dialogs示例所示

private async void DisplayNoWifiDialog()
{
    ContentDialog noWifiDialog = new ContentDialog
    {
        Title = "No wifi connection",
        Content = "Check your connection and try again.",
        CloseButtonText = "Ok"
    };

    ContentDialogResult result = await noWifiDialog.ShowAsync();
}

当用户单击我的MainPage.xaml上的“in”按钮显示该对话框时，当用户单击"ok“返回到MainPage.xaml时，但当我运行程序时，请给我以下错误：”必须将XamlRoot显式设置为无父级的弹出窗口“

我怎么解决这个问题？

谢谢!

Answer 1

似乎您正在开发一个WinUI3应用程序。正如@Raymond所提到的，您必须将ContentDialog.添加XamlRoot property

Xaml：

  <StackPanel x:Name="MyPanel" Orientation="Horizontal" HorizontalAlignment="Center" VerticalAlignment="Center">
    <Button x:Name="myButton" Click="myButton_Click">Click Me</Button>
</StackPanel>

代码隐藏：

 private async void myButton_Click(object sender, RoutedEventArgs e)
    {
        ContentDialog noWifiDialog = new ContentDialog
        {
            Title = "No wifi connection",
            Content = "Check your connection and try again.",
            CloseButtonText = "Ok"
        };
        //set the XamlRoot property
        noWifiDialog.XamlRoot = MyPanel.XamlRoot;

        ContentDialogResult result = await noWifiDialog.ShowAsync();
    }