这是代码：
<Window x:Class="Ani.MainWindow"
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:Ani"
xmlns:materialDesign="http://materialdesigninxaml.net/winfx/xaml/themes"
mc:Ignorable="d" Height="600" Width="1080" ResizeMode="NoResize" WindowStartupLocation="CenterScreen" WindowStyle="None">
<Window.Resources>
<Storyboard x:Key="CloseMenu">
<DoubleAnimationUsingKeyFrames Storyboard.TargetProperty="(UIElement.RenderTransform).(TransformGroup.Children)[3].(TranslateTransform.X)" Storyboard.TargetName="GridMenu">
<EasingDoubleKeyFrame KeyTime="0" Value="250"/>
<EasingDoubleKeyFrame KeyTime="0:0:0.5" Value="0"/>
</DoubleAnimationUsingKeyFrames>
<DoubleAnimationUsingKeyFrames Storyboard.TargetProperty="(UIElement.Opacity)" Storyboard.TargetName="GridBackground">
<EasingDoubleKeyFrame KeyTime="0" Value="1"/>
<EasingDoubleKeyFrame KeyTime="0:0:0.5" Value="0"/>
</DoubleAnimationUsingKeyFrames>
</Storyboard>
<Storyboard x:Key="OpenMenu">
<DoubleAnimationUsingKeyFrames Storyboard.TargetProperty="(UIElement.RenderTransform).(TransformGroup.Children)[3].(TranslateTransform.X)" Storyboard.TargetName="GridMenu">
<EasingDoubleKeyFrame KeyTime="0" Value="0"/>
<EasingDoubleKeyFrame KeyTime="0:0:0.5" Value="250"/>
</DoubleAnimationUsingKeyFrames>
<DoubleAnimationUsingKeyFrames Storyboard.TargetProperty="(UIElement.Opacity)" Storyboard.TargetName="GridBackground">
<EasingDoubleKeyFrame KeyTime="0" Value="0"/>
<EasingDoubleKeyFrame KeyTime="0:0:0.5" Value="1"/>
</DoubleAnimationUsingKeyFrames>
</Storyboard>
</Window.Resources>
<Window.Triggers>
<EventTrigger RoutedEvent="ButtonBase.Click" SourceName="ButtonClose">
<BeginStoryboard x:Name="CLoseMenu_BeginStoryBoard" Storyboard="{DynamicResource CloseMenu}"/>
</EventTrigger>
<EventTrigger RoutedEvent="ButtonBase.Click" SourceName="ButtonOpen">
<BeginStoryboard Storyboard="{DynamicResource OpenMenu}"/>
</EventTrigger>
</Window.Triggers>
<Grid>
<Grid x:Name="GridBackground" Background="#55313131" Opacity="0">
<Grid.RenderTransform>
<TransformGroup>
<TransformGroup>
<ScaleTransform/>
<SkewTransform/>
<RotateTransform/>
<TranslateTransform/>
</TransformGroup>
</TransformGroup>
</Grid.RenderTransform>
</Grid>
<Button Name="ButtonOpen" Background="Transparent" BorderBrush="Transparent" Click="ButtonClose_Click" Width="40" Height="40" Margin="0,0,1040,560" >
<materialDesign:PackIcon Kind="Menu" Height="25" Width="28" Foreground="Gray" Padding="0"/>
</Button>
<Grid x:Name="GridMenu" Width="250" HorizontalAlignment="Left" Margin="-250,0,0,0" Background="White" RenderTransformOrigin="0.5,0.5">
<Grid.RenderTransform>
<TransformGroup>
<TransformGroup>
<ScaleTransform/>
<SkewTransform/>
<RotateTransform/>
<TranslateTransform/>
</TransformGroup>
</TransformGroup>
</Grid.RenderTransform>
<StackPanel>
<Image Height="140" Stretch="Fill">
<Image.Source>
<BitmapImage UriSource="file:///C:/Users/Jeremy/Desktop/yuanjian/Practice/Pic/timg.jpg"/>
</Image.Source>
</Image>
<ListView Foreground="#FF313131" FontFamily="Chamoagne & Limousines" FontSize="18" BorderBrush="Transparent">
<ListViewItem Height="45" Padding="0">
<StackPanel Orientation="Horizontal" Margin="10 0">
<materialDesign:PackIcon Kind="Recycle" Width="20" Height="20" VerticalAlignment="Center" Margin="5" Foreground="Gray"/>
<TextBlock Text="Recycle" Margin="10"/>
</StackPanel>
</ListViewItem>
<ListViewItem Height="45" Padding="0">
<StackPanel Orientation="Horizontal" Margin="10 0">
<materialDesign:PackIcon Kind="HelpCircleOutline" Width="20" Height="20" VerticalAlignment="Center" Margin="5" Foreground="#FFF08033"/>
<TextBlock Text="Help" Margin="10"/>
</StackPanel>
</ListViewItem>
<ListViewItem Height="45" Padding="0">
<StackPanel Orientation="Horizontal" Margin="10 0">
<materialDesign:PackIcon Kind="Lightbulb" Width="20" Height="20" VerticalAlignment="Center" Margin="5" Foreground="Green"/>
<TextBlock Text="Send Feedback" Margin="10"/>
</StackPanel>
</ListViewItem>
<ListViewItem Height="45" Padding="0">
<StackPanel Orientation="Horizontal" Margin="10 0">
<materialDesign:PackIcon Kind="Heart" Width="20" Height="20" VerticalAlignment="Center" Margin="5" Foreground="#FFD41515"/>
<TextBlock Text="Recommend" Margin="10"/>
</StackPanel>
</ListViewItem>
<ListViewItem Height="45" Padding="0">
<StackPanel Orientation="Horizontal" Margin="10 0">
<materialDesign:PackIcon Kind="StarCircle" Width="20" Height="20" VerticalAlignment="Center" Margin="5" Foreground="#FFE6A701"/>
<TextBlock Text="Premiun Subscription" Margin="10"/>
</StackPanel>
</ListViewItem>
<ListViewItem Height="45" Padding="0">
<StackPanel Orientation="Horizontal" Margin="10 0">
<materialDesign:PackIcon Kind="Settings" Width="20" Height="20" VerticalAlignment="Center" Margin="5" Foreground="#FF0069C1"/>
<TextBlock Text="Settings" Margin="10"/>
</StackPanel>
</ListViewItem>
</ListView>
</StackPanel>
<Button Name="ButtonClose" Margin="216,0,0,571" Background="Transparent" BorderBrush="Transparent" Height="40" Width="40" Click="ButtonClose_Click" >
<materialDesign:PackIcon Kind="Close" Height="25" Width="28" Foreground="White" Padding="0"/>
</Button>
</Grid>
</Grid>
</Window>
为什么我在Grid里写了TransformGroup,运行时还是出错了？
这是写界面时的样子
报错
大神帮帮看看哪里出了问题~
