执行故事板以关闭在 showdialog 中打开的窗口时出错

Question

当Storyboard关闭窗口“This Visual is not connected to a PresentationSource”时，我得到了这个错误。我的场景包括两个窗口和一个 UserControl这是window1的xaml代码：<Window x:Name="LWindow" x:Class="WpfAppXtesting.WindowTest1"    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"    xmlns:d="http://schemas.microsoft.com/expression/blend/2008"    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"    xmlns:local="clr-namespace:WpfAppXtesting"    mc:Ignorable="d"    WindowStyle="None"    Title="WindowTest1" Height="160" Width="435"><Window.Resources>    <ResourceDictionary>        <ResourceDictionary.MergedDictionaries>        </ResourceDictionary.MergedDictionaries>        <!-- Storyboard -->        <Storyboard x:Key="OpenLWindow">            <DoubleAnimationUsingKeyFrames Storyboard.TargetProperty="(FrameworkElement.Width)" Storyboard.TargetName="LWindow">                <EasingDoubleKeyFrame KeyTime="0" Value="0"/>                <EasingDoubleKeyFrame KeyTime="0:0:0.5" Value="434.4"/>            </DoubleAnimationUsingKeyFrames>            <DoubleAnimationUsingKeyFrames Storyboard.TargetProperty="(FrameworkElement.Height)" Storyboard.TargetName="LWindow">                <EasingDoubleKeyFrame KeyTime="0" Value="37"/>                <EasingDoubleKeyFrame KeyTime="0:0:0.5" Value="37"/>                <EasingDoubleKeyFrame KeyTime="0:0:1" Value="159.8"/>            </DoubleAnimationUsingKeyFrames>        </Storyboard>    

Answer 1

尝试使用Dispatcher类在消息循环的下一次迭代中关闭窗口：

private void CloseLWindow_Completed(object sender, EventArgs e)

{

    Dispatcher.BeginInvoke(new Action(() => Close()));

}