列表框选择会产生“无法对不可变对象进行动画处理”错误

发布于 2024-10-12 11:11:39 字数 10728 浏览 2 评论 0原文

我有一个 WPF 4 应用程序。它包含 2 个列表框。

第一个有可用匹配的列表。当选择匹配项时,该选择将用作显示匹配项详细信息的详细信息网格的 DataContext。此外,还会播放故事板,并显示第二个列表框,显示可用市场。

这一切都很好。

问题是,当从第二个列表框中选择市场时,应用程序崩溃,我得到:

InvalidOperationException 是 未处理

无法为“(0).(1)”设置动画 不可变对象实例

我不知道为什么会发生这种情况,因为市场列表框不会尝试播放任何动画。会不会干扰比赛名单的选择? 我尝试在 MarketsList 中进行选择时重置详细信息数据上下文,但这不起作用。

这是两个 ListBoxes 的 xaml

       <StackPanel x:Name="Connected" Grid.Column="1" Grid.Row="1" Visibility="Collapsed">
            <ListBox x:Name="ListBoxMatches" HorizontalAlignment="Left" VerticalAlignment="Center" ItemContainerStyle="{DynamicResource ListBoxItemContainerStyle1}" ItemTemplate="{DynamicResource MatchesDataTemplate}" SelectionChanged="ListBoxMatches_SelectionChanged" />
        </StackPanel>

        <Border x:Name="border1" BorderBrush="White" BorderThickness="1" Grid.Row="1" CornerRadius="20" Padding="15" Margin="-400,0,400,0">
            <StackPanel x:Name="Markets">
                <ListBox x:Name="ListBoxCurrentMarkets" SelectionChanged="ListBoxCurrentMarkets_SelectionChanged" />
            </StackPanel>
        </Border>

这是 ListBoxMatches 的 SelectionChanged 事件的代码:

 private void ListBoxMatches_SelectionChanged(object sender, SelectionChangedEventArgs e)
        {
            if (ListBoxMatches.SelectedIndex != -1)
            {
                var selectedMatch = (Match)ListBoxMatches.SelectedItem;
                if (MatchData.DataContext == null)
                {
                    MatchData.DataContext = selectedMatch;
                    Storyboard PlayMatch = (Storyboard)FindResource("MatchSelected");
                    BeginStoryboard(PlayMatch);
                }
                else if (MatchData.DataContext != selectedMatch)
                {
                    MatchData.DataContext = selectedMatch;
                }
            }
        }

如果您需要更多代码(如故事板 xaml),请告诉我。

如果有人知道为什么以及发生了什么事,请帮忙。

谢谢

更新

我做了丹尼尔建议的更改,但我一定做错了什么,因为它不起作用。 这是我设置项目源的代码:

 List<Market> TestList = new List<Market>();
                Market market = new Market { ID = 0, MarketName = "CorrectScore" };
                TestList.Add(market);
                market = new Market { ID = 1, MarketName = "Match Odds" };
                TestList.Add(market);                
                ListBoxCurrentMarkets.ItemsSource = TestList;    

这是列表框的 xaml

<ListBox x:Name="ListBoxCurrentMarkets" SelectionChanged="ListBoxCurrentMarkets_SelectionChanged" ItemContainerStyle="{DynamicResource ListBoxItemContainerStyle1}">
                    <ListBox.ItemTemplate>
                        <DataTemplate>
                            <Grid>
                                <TextBlock x:Name="Market" Foreground="Black" TextWrapping="Wrap" Text="{Binding MarketName, Converter={x:Static local:MyCloneConverter.Instance}}" />
                            </Grid>
                        </DataTemplate>
                    </ListBox.ItemTemplate>
                </ListBox>

,这是 CloneConverter:

public class MyCloneConverter : IValueConverter
    {
        public static MyCloneConverter Instance = new MyCloneConverter();

        public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
        {
            if (value is Freezable)
            {
                value = (value as Freezable).Clone();
            }

            return value;
        }

        public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
        {
            throw new NotSupportedException();
        }

    }

请看一下并告诉我您的想法?我在 valueconverter 中放置了一个断点,但它没有被击中。此外,列表框中的项目也会显示,只有在进行选择时才会发生错误。 谢谢

更新

这是动画的xaml。动画将 2 个负边距边框移动到正边距(即从屏幕外进入屏幕)。有一个包含 MatchDetails(绑定到匹配的文本块数据)的边框,所讨论的边框是包含可用市场列表框的边框。

<Storyboard x:Key="MatchSelected">
            <ThicknessAnimationUsingKeyFrames Storyboard.TargetProperty="(FrameworkElement.Margin)" Storyboard.TargetName="borderMatchData">
                <EasingThicknessKeyFrame KeyTime="0" Value="0,-400,0,400"/>
                <EasingThicknessKeyFrame KeyTime="0:0:1" Value="0"/>
            </ThicknessAnimationUsingKeyFrames>
            <ThicknessAnimationUsingKeyFrames Storyboard.TargetProperty="(FrameworkElement.Margin)" Storyboard.TargetName="borderMarkets">
                <EasingThicknessKeyFrame KeyTime="0" Value="-400,0,400,0"/>
                <EasingThicknessKeyFrame KeyTime="0:0:1" Value="0"/>
            </ThicknessAnimationUsingKeyFrames>
        </Storyboard>

这是从 MatchesListBox 的选择更改事件中播放故事板的代码:

MatchData.DataContext = selectedMatch;
                    Storyboard PlayMatch = (Storyboard)FindResource("MatchSelected");
                    BeginStoryboard(PlayMatch);

这是 BorderMArkets 的 xaml:

<Border x:Name="borderMarkets" BorderBrush="White" BorderThickness="1" Grid.Row="1" CornerRadius="20" Padding="15" Margin="-400,0,400,0">
            <StackPanel x:Name="Markets">
                <ListBox x:Name="ListBoxCurrentMarkets" SelectionChanged="ListBoxCurrentMarkets_SelectionChanged" ItemContainerStyle="{DynamicResource ListBoxItemContainerStyle1}">
                    <ListBox.ItemTemplate>
                        <DataTemplate>
                            <Grid>
                                <TextBlock x:Name="Market" Foreground="Black" TextWrapping="Wrap" Text="{Binding MarketName, Converter={StaticResource CloneConverter}}" />
                            </Grid>
                        </DataTemplate>
                    </ListBox.ItemTemplate>
                </ListBox>
            </StackPanel>
        </Border>

更新

这是导致所有问题的模板(我认为)

<ControlTemplate x:Key="ListBoxItemControlTemplate1" TargetType="{x:Type ListBoxItem}">
        <Border x:Name="Bd" BorderBrush="{TemplateBinding BorderBrush}" BorderThickness="{TemplateBinding BorderThickness}" Padding="{TemplateBinding Padding}" SnapsToDevicePixels="true" Background="#FF807F7F">
            <VisualStateManager.VisualStateGroups>
                <VisualStateGroup x:Name="CommonStates">
                    <VisualState x:Name="Normal"/>
                    <VisualState x:Name="MouseOver">
                        <Storyboard>
                            <ColorAnimationUsingKeyFrames Storyboard.TargetProperty="(Panel.Background).(SolidColorBrush.Color)" Storyboard.TargetName="Bd">
                                <EasingColorKeyFrame KeyTime="0" Value="#FF3D3B3B"/>
                            </ColorAnimationUsingKeyFrames>
                        </Storyboard>
                    </VisualState>
                    <VisualState x:Name="Disabled"/>
                </VisualStateGroup>
                <VisualStateGroup x:Name="SelectionStates">
                    <VisualState x:Name="Unselected"/>
                    <VisualState x:Name="Selected">
                        <Storyboard>
                            <ColorAnimationUsingKeyFrames Storyboard.TargetProperty="(Panel.Background).(SolidColorBrush.Color)" Storyboard.TargetName="Bd">
                                <EasingColorKeyFrame KeyTime="0" Value="#FFA71616"/>
                            </ColorAnimationUsingKeyFrames>
                        </Storyboard>
                    </VisualState>
                    <VisualState x:Name="SelectedUnfocused">
                        <Storyboard>
                            <ColorAnimationUsingKeyFrames Storyboard.TargetProperty="(Panel.Background).(SolidColorBrush.Color)" Storyboard.TargetName="Bd">
                                <EasingColorKeyFrame KeyTime="0" Value="#FFA71616"/>
                            </ColorAnimationUsingKeyFrames>
                        </Storyboard>
                    </VisualState>
                </VisualStateGroup>
                <VisualStateGroup x:Name="FocusStates">
                    <VisualState x:Name="Unfocused"/>
                    <VisualState x:Name="Focused">
                        <Storyboard>
                            <ColorAnimationUsingKeyFrames Storyboard.TargetProperty="(Panel.Background).(SolidColorBrush.Color)" Storyboard.TargetName="Bd">
                                <EasingColorKeyFrame KeyTime="0" Value="#FF18E526"/>
                            </ColorAnimationUsingKeyFrames>
                        </Storyboard>
                    </VisualState>
                </VisualStateGroup>
            </VisualStateManager.VisualStateGroups>
            <ContentPresenter HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}" VerticalAlignment="{TemplateBinding VerticalContentAlignment}"/>
        </Border>
        <ControlTemplate.Triggers>
            <Trigger Property="IsSelected" Value="true">
                <Setter Property="Background" TargetName="Bd" Value="{DynamicResource {x:Static SystemColors.HighlightBrushKey}}"/>
                <Setter Property="Foreground" Value="{DynamicResource {x:Static SystemColors.HighlightTextBrushKey}}"/>
            </Trigger>
            <MultiTrigger>
                <MultiTrigger.Conditions>
                    <Condition Property="IsSelected" Value="true"/>
                    <Condition Property="Selector.IsSelectionActive" Value="false"/>
                </MultiTrigger.Conditions>
                <Setter Property="Background" TargetName="Bd" Value="{DynamicResource {x:Static SystemColors.ControlBrushKey}}"/>
                <Setter Property="Foreground" Value="{DynamicResource {x:Static SystemColors.ControlTextBrushKey}}"/>
            </MultiTrigger>
            <Trigger Property="IsEnabled" Value="false">
                <Setter Property="Foreground" Value="{DynamicResource {x:Static SystemColors.GrayTextBrushKey}}"/>
            </Trigger>
        </ControlTemplate.Triggers>
    </ControlTemplate>

I have a WPF 4 application. It contains 2 listboxes.

The first has a list of available matches. when a match is selected the selection is used as the DataContext for a details grid displaying details of the match. Additionally a storyboard is played and the 2nd Listbox comes into view displaying the available markets.

This all works fine.

Problem is when a market is selected from the 2nd listbox the app crashes and I get :

InvalidOperationException was
unhandled

Cannot animate '(0).(1)' on
an immutable object instance

I don't know why this is happening since the Markets Listbox doesn't try to play any animation. Could it be interfering with the selection from the match list??
I tried resetting the details datacontext when a selection is made in the MarketsList but that didnt work.

Here's the xaml for the two ListBoxes

       <StackPanel x:Name="Connected" Grid.Column="1" Grid.Row="1" Visibility="Collapsed">
            <ListBox x:Name="ListBoxMatches" HorizontalAlignment="Left" VerticalAlignment="Center" ItemContainerStyle="{DynamicResource ListBoxItemContainerStyle1}" ItemTemplate="{DynamicResource MatchesDataTemplate}" SelectionChanged="ListBoxMatches_SelectionChanged" />
        </StackPanel>

        <Border x:Name="border1" BorderBrush="White" BorderThickness="1" Grid.Row="1" CornerRadius="20" Padding="15" Margin="-400,0,400,0">
            <StackPanel x:Name="Markets">
                <ListBox x:Name="ListBoxCurrentMarkets" SelectionChanged="ListBoxCurrentMarkets_SelectionChanged" />
            </StackPanel>
        </Border>

This is the code for the SelectionChanged event for the ListBoxMatches:

 private void ListBoxMatches_SelectionChanged(object sender, SelectionChangedEventArgs e)
        {
            if (ListBoxMatches.SelectedIndex != -1)
            {
                var selectedMatch = (Match)ListBoxMatches.SelectedItem;
                if (MatchData.DataContext == null)
                {
                    MatchData.DataContext = selectedMatch;
                    Storyboard PlayMatch = (Storyboard)FindResource("MatchSelected");
                    BeginStoryboard(PlayMatch);
                }
                else if (MatchData.DataContext != selectedMatch)
                {
                    MatchData.DataContext = selectedMatch;
                }
            }
        }

If you need anymore code(like the storyboard xaml) please let me know.

If anyone knows why and whats going on please help.

Thanks

UPDATE

I made the change recommended by Daniel but I must have done something wrong as it's not working.
This is the code just where I set the items source:

 List<Market> TestList = new List<Market>();
                Market market = new Market { ID = 0, MarketName = "CorrectScore" };
                TestList.Add(market);
                market = new Market { ID = 1, MarketName = "Match Odds" };
                TestList.Add(market);                
                ListBoxCurrentMarkets.ItemsSource = TestList;    

This is the xaml for the listbox

<ListBox x:Name="ListBoxCurrentMarkets" SelectionChanged="ListBoxCurrentMarkets_SelectionChanged" ItemContainerStyle="{DynamicResource ListBoxItemContainerStyle1}">
                    <ListBox.ItemTemplate>
                        <DataTemplate>
                            <Grid>
                                <TextBlock x:Name="Market" Foreground="Black" TextWrapping="Wrap" Text="{Binding MarketName, Converter={x:Static local:MyCloneConverter.Instance}}" />
                            </Grid>
                        </DataTemplate>
                    </ListBox.ItemTemplate>
                </ListBox>

and this is the CloneConverter:

public class MyCloneConverter : IValueConverter
    {
        public static MyCloneConverter Instance = new MyCloneConverter();

        public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
        {
            if (value is Freezable)
            {
                value = (value as Freezable).Clone();
            }

            return value;
        }

        public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
        {
            throw new NotSupportedException();
        }

    }

Please take a look and tell me what you think? I put a breakpoint in the valueconverter and it's not getting hit. Also the item's in the listbox are showing up it's only when a selection is made that the error occurs.
Thanks

UPDATE

This is the xaml for the animation. The animation moves 2 negatively margined borders into positive margin(ie from out of screen into screen). There is a border which contains MatchDetails(textblocks databound to a Match), the one in question is a Border which contains the available markets ListBox.

<Storyboard x:Key="MatchSelected">
            <ThicknessAnimationUsingKeyFrames Storyboard.TargetProperty="(FrameworkElement.Margin)" Storyboard.TargetName="borderMatchData">
                <EasingThicknessKeyFrame KeyTime="0" Value="0,-400,0,400"/>
                <EasingThicknessKeyFrame KeyTime="0:0:1" Value="0"/>
            </ThicknessAnimationUsingKeyFrames>
            <ThicknessAnimationUsingKeyFrames Storyboard.TargetProperty="(FrameworkElement.Margin)" Storyboard.TargetName="borderMarkets">
                <EasingThicknessKeyFrame KeyTime="0" Value="-400,0,400,0"/>
                <EasingThicknessKeyFrame KeyTime="0:0:1" Value="0"/>
            </ThicknessAnimationUsingKeyFrames>
        </Storyboard>

This is the code for playing the storyboard from the selectionchanged event for the MatchesListBox:

MatchData.DataContext = selectedMatch;
                    Storyboard PlayMatch = (Storyboard)FindResource("MatchSelected");
                    BeginStoryboard(PlayMatch);

This is the xaml for the BorderMArkets:

<Border x:Name="borderMarkets" BorderBrush="White" BorderThickness="1" Grid.Row="1" CornerRadius="20" Padding="15" Margin="-400,0,400,0">
            <StackPanel x:Name="Markets">
                <ListBox x:Name="ListBoxCurrentMarkets" SelectionChanged="ListBoxCurrentMarkets_SelectionChanged" ItemContainerStyle="{DynamicResource ListBoxItemContainerStyle1}">
                    <ListBox.ItemTemplate>
                        <DataTemplate>
                            <Grid>
                                <TextBlock x:Name="Market" Foreground="Black" TextWrapping="Wrap" Text="{Binding MarketName, Converter={StaticResource CloneConverter}}" />
                            </Grid>
                        </DataTemplate>
                    </ListBox.ItemTemplate>
                </ListBox>
            </StackPanel>
        </Border>

UPDATE

This is the template that was causing all the problems(I think)

<ControlTemplate x:Key="ListBoxItemControlTemplate1" TargetType="{x:Type ListBoxItem}">
        <Border x:Name="Bd" BorderBrush="{TemplateBinding BorderBrush}" BorderThickness="{TemplateBinding BorderThickness}" Padding="{TemplateBinding Padding}" SnapsToDevicePixels="true" Background="#FF807F7F">
            <VisualStateManager.VisualStateGroups>
                <VisualStateGroup x:Name="CommonStates">
                    <VisualState x:Name="Normal"/>
                    <VisualState x:Name="MouseOver">
                        <Storyboard>
                            <ColorAnimationUsingKeyFrames Storyboard.TargetProperty="(Panel.Background).(SolidColorBrush.Color)" Storyboard.TargetName="Bd">
                                <EasingColorKeyFrame KeyTime="0" Value="#FF3D3B3B"/>
                            </ColorAnimationUsingKeyFrames>
                        </Storyboard>
                    </VisualState>
                    <VisualState x:Name="Disabled"/>
                </VisualStateGroup>
                <VisualStateGroup x:Name="SelectionStates">
                    <VisualState x:Name="Unselected"/>
                    <VisualState x:Name="Selected">
                        <Storyboard>
                            <ColorAnimationUsingKeyFrames Storyboard.TargetProperty="(Panel.Background).(SolidColorBrush.Color)" Storyboard.TargetName="Bd">
                                <EasingColorKeyFrame KeyTime="0" Value="#FFA71616"/>
                            </ColorAnimationUsingKeyFrames>
                        </Storyboard>
                    </VisualState>
                    <VisualState x:Name="SelectedUnfocused">
                        <Storyboard>
                            <ColorAnimationUsingKeyFrames Storyboard.TargetProperty="(Panel.Background).(SolidColorBrush.Color)" Storyboard.TargetName="Bd">
                                <EasingColorKeyFrame KeyTime="0" Value="#FFA71616"/>
                            </ColorAnimationUsingKeyFrames>
                        </Storyboard>
                    </VisualState>
                </VisualStateGroup>
                <VisualStateGroup x:Name="FocusStates">
                    <VisualState x:Name="Unfocused"/>
                    <VisualState x:Name="Focused">
                        <Storyboard>
                            <ColorAnimationUsingKeyFrames Storyboard.TargetProperty="(Panel.Background).(SolidColorBrush.Color)" Storyboard.TargetName="Bd">
                                <EasingColorKeyFrame KeyTime="0" Value="#FF18E526"/>
                            </ColorAnimationUsingKeyFrames>
                        </Storyboard>
                    </VisualState>
                </VisualStateGroup>
            </VisualStateManager.VisualStateGroups>
            <ContentPresenter HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}" VerticalAlignment="{TemplateBinding VerticalContentAlignment}"/>
        </Border>
        <ControlTemplate.Triggers>
            <Trigger Property="IsSelected" Value="true">
                <Setter Property="Background" TargetName="Bd" Value="{DynamicResource {x:Static SystemColors.HighlightBrushKey}}"/>
                <Setter Property="Foreground" Value="{DynamicResource {x:Static SystemColors.HighlightTextBrushKey}}"/>
            </Trigger>
            <MultiTrigger>
                <MultiTrigger.Conditions>
                    <Condition Property="IsSelected" Value="true"/>
                    <Condition Property="Selector.IsSelectionActive" Value="false"/>
                </MultiTrigger.Conditions>
                <Setter Property="Background" TargetName="Bd" Value="{DynamicResource {x:Static SystemColors.ControlBrushKey}}"/>
                <Setter Property="Foreground" Value="{DynamicResource {x:Static SystemColors.ControlTextBrushKey}}"/>
            </MultiTrigger>
            <Trigger Property="IsEnabled" Value="false">
                <Setter Property="Foreground" Value="{DynamicResource {x:Static SystemColors.GrayTextBrushKey}}"/>
            </Trigger>
        </ControlTemplate.Triggers>
    </ControlTemplate>

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会发光的星星闪亮亮i 2024-10-19 11:11:39

请参阅 http://blogs.msdn.com/b/ mikehillberg/archive/2006/09/26/cannotanimateimmutableobjectinstance.aspx

基本上,如果您对数据绑定属性进行动画处理,就会发生这种情况。

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