uwp - WinUI 3 UWP - 对话框

Question

我正在 WinUI3 UWP 中为 Windows 11 开发一个新应用程序，我想显示一个对话框以提供安全操作，如 Microsoft Docs 的这个示例:https://learn.microsoft.com/en-us/windows/apps/design/controls/dialogs-and-flyouts/dialogs

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 上的按钮时显示该对话框，当用户单击“确定”时返回到 MainPage.xaml，但是当我运行我的程序时给我这个错误:“XamlRoot 必须显式设置为无父级弹出”

我该如何解决？

谢谢!

Answer 1

您似乎正在开发 WinUI3 应用程序。正如@Raymond Chen 提到的，您必须将 XamlRoot 属性 添加到 ContentDialog。

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();
    }