我有一个主datagrid,然后是一个手风琴控件.在其中一个手风琴项目中,我有另一个datagrid绑定到第一个数据网格的选定项目.简单的xaml是：
<sdk:DataGrid Name="dgMain" ItemsSource="{Binding SomeSource}" />
<toolkit:Accordion>
<toolkit:AccordionItem Header="Details">
<sdk:DataGrid ItemsSource="{Binding ElementName=dgMain,Path=SelectedItem.Children}"/>
</toolkit:AccordionItem>
</toolkit:Accordion>
我将第二个网格的VerticalAlignment属性设置为“Stretch”,所以它随着不同的集合大小而被拉伸,但问题是它只在AccordionItem大小中延伸,所以如果我在第一个网格中选择了一个新项目“儿童”,因为AccordionItem没有改变,所以我必须滚动第二个网格.
AccordionItem区域只会在我凝结并再次展开时发生变化.将VerticalContentAlignment设置为手风琴项目的“拉伸”不起作用.我猜是因为它只是在第一次展开时触发这个.
有人知道还有什么可以尝试,还是我错过了什么.我更喜欢坚持xaml解决方案,所以我可以保持MVVM友好,但很高兴听到一切.
解决方法
AccordionItem没有正确调整大小的原因是因为它的一个控件部分 – ExpandableContentControl中有一个错误.问题描述为
here.
我想你可以修复它的源代码,或者更容易地,使用正常的ContentControl将其从默认样式替换.我在这里包含一个正常的ContentControl的样式,并在@JohnNicholas提供的代码中进行测试,它的工作原理.
<Style TargetType="toolkit:AccordionItem"> <Setter Property="BorderThickness" Value="1"/> <Setter Property="BorderBrush" Value="#FFECECEC"/> <Setter Property="Background" Value="White"/> <Setter Property="Margin" Value="0"/> <Setter Property="Padding" Value="0"/> <Setter Property="HorizontalAlignment" Value="Stretch"/> <Setter Property="VerticalAlignment" Value="Stretch"/> <Setter Property="HorizontalContentAlignment" Value="Left"/> <Setter Property="VerticalContentAlignment" Value="Top"/> <Setter Property="IsTabStop" Value="False"/> <Setter Property="Template"> <Setter.Value> <ControlTemplate TargetType="toolkit:AccordionItem"> <Grid Background="{TemplateBinding Background}" HorizontalAlignment="{TemplateBinding HorizontalAlignment}" VerticalAlignment="{TemplateBinding VerticalAlignment}"> <VisualStateManager.VisualStateGroups> <VisualStateGroup x:Name="CommonStates"> <VisualStateGroup.Transitions> <VisualTransition GeneratedDuration="0"/> </VisualStateGroup.Transitions> <VisualState x:Name="Normal"/> <VisualState x:Name="Pressed"/> <VisualState x:Name="MouSEOver"/> <VisualState x:Name="Disabled"/> </VisualStateGroup> <VisualStateGroup x:Name="FocusStates"> <VisualState x:Name="Focused"/> <VisualState x:Name="Unfocused"/> </VisualStateGroup> <VisualStateGroup x:Name="ExpansionStates"> <VisualStateGroup.Transitions> <VisualTransition GeneratedDuration="0"/> </VisualStateGroup.Transitions> <VisualState x:Name="Collapsed"> <Storyboard> <ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="(UIElement.Visibility)" Storyboard.TargetName="ExpandSite"> <DiscreteObjectKeyFrame KeyTime="0"> <DiscreteObjectKeyFrame.Value> <Visibility>Collapsed</Visibility> </DiscreteObjectKeyFrame.Value> </DiscreteObjectKeyFrame> </ObjectAnimationUsingKeyFrames> </Storyboard> </VisualState> <VisualState x:Name="Expanded"> </VisualState> </VisualStateGroup> <VisualStateGroup x:Name="LockedStates"> <VisualStateGroup.Transitions> <VisualTransition GeneratedDuration="0"/> </VisualStateGroup.Transitions> <VisualState x:Name="Locked"> <Storyboard> <ObjectAnimationUsingKeyFrames Duration="0" Storyboard.TargetProperty="IsEnabled" Storyboard.TargetName="ExpanderButton"> <DiscreteObjectKeyFrame KeyTime="0" Value="False"/> </ObjectAnimationUsingKeyFrames> </Storyboard> </VisualState> <VisualState x:Name="Unlocked"> <Storyboard> <ObjectAnimationUsingKeyFrames Duration="0" Storyboard.TargetProperty="IsEnabled" Storyboard.TargetName="ExpanderButton"> <DiscreteObjectKeyFrame KeyTime="0" Value="True"/> </ObjectAnimationUsingKeyFrames> </Storyboard> </VisualState> </VisualStateGroup> <VisualStateGroup x:Name="ExpandDirectionStates"> <VisualStateGroup.Transitions> <VisualTransition GeneratedDuration="0"/> </VisualStateGroup.Transitions> <VisualState x:Name="ExpandDown"> <Storyboard> <ObjectAnimationUsingKeyFrames Duration="0" Storyboard.TargetProperty="Height" Storyboard.TargetName="rd1"> <DiscreteObjectKeyFrame KeyTime="0" Value="*"/> </ObjectAnimationUsingKeyFrames> <ObjectAnimationUsingKeyFrames Duration="0" Storyboard.TargetProperty="Width" Storyboard.TargetName="cd0"> <DiscreteObjectKeyFrame KeyTime="0" Value="*"/> </ObjectAnimationUsingKeyFrames> </Storyboard> </VisualState> <VisualState x:Name="ExpandUp"> <Storyboard> <ObjectAnimationUsingKeyFrames Duration="0" Storyboard.TargetProperty="(Grid.Row)" Storyboard.TargetName="ExpanderButton"> <DiscreteObjectKeyFrame KeyTime="0" Value="1"/> </ObjectAnimationUsingKeyFrames> <ObjectAnimationUsingKeyFrames Duration="0" Storyboard.TargetProperty="(Grid.Row)" Storyboard.TargetName="ExpandSite"> <DiscreteObjectKeyFrame KeyTime="0" Value="0"/> </ObjectAnimationUsingKeyFrames> <ObjectAnimationUsingKeyFrames Duration="0" Storyboard.TargetProperty="Height" Storyboard.TargetName="rd0"> <DiscreteObjectKeyFrame KeyTime="0" Value="*"/> </ObjectAnimationUsingKeyFrames> <ObjectAnimationUsingKeyFrames Duration="0" Storyboard.TargetProperty="Width" Storyboard.TargetName="cd0"> <DiscreteObjectKeyFrame KeyTime="0" Value="*"/> </ObjectAnimationUsingKeyFrames> </Storyboard> </VisualState> <VisualState x:Name="ExpandLeft"> <Storyboard> <ObjectAnimationUsingKeyFrames Duration="0" Storyboard.TargetProperty="(Grid.ColumnSpan)" Storyboard.TargetName="ExpanderButton"> <DiscreteObjectKeyFrame KeyTime="0" Value="1"/> </ObjectAnimationUsingKeyFrames> <ObjectAnimationUsingKeyFrames Duration="0" Storyboard.TargetProperty="(Grid.ColumnSpan)" Storyboard.TargetName="ExpandSite"> <DiscreteObjectKeyFrame KeyTime="0" Value="1"/> </ObjectAnimationUsingKeyFrames> <ObjectAnimationUsingKeyFrames Duration="0" Storyboard.TargetProperty="(Grid.RowSpan)" Storyboard.TargetName="ExpanderButton"> <DiscreteObjectKeyFrame KeyTime="0" Value="2"/> </ObjectAnimationUsingKeyFrames> <ObjectAnimationUsingKeyFrames Duration="0" Storyboard.TargetProperty="(Grid.RowSpan)" Storyboard.TargetName="ExpandSite"> <DiscreteObjectKeyFrame KeyTime="0" Value="2"/> </ObjectAnimationUsingKeyFrames> <ObjectAnimationUsingKeyFrames Duration="0" Storyboard.TargetProperty="(Grid.Column)" Storyboard.TargetName="ExpanderButton"> <DiscreteObjectKeyFrame KeyTime="0" Value="1"/> </ObjectAnimationUsingKeyFrames> <ObjectAnimationUsingKeyFrames Duration="0" Storyboard.TargetProperty="(Grid.Row)" Storyboard.TargetName="ExpandSite"> <DiscreteObjectKeyFrame KeyTime="0" Value="0"/> </ObjectAnimationUsingKeyFrames> <ObjectAnimationUsingKeyFrames Duration="0" Storyboard.TargetProperty="Height" Storyboard.TargetName="rd0"> <DiscreteObjectKeyFrame KeyTime="0" Value="*"/> </ObjectAnimationUsingKeyFrames> <ObjectAnimationUsingKeyFrames Duration="0" Storyboard.TargetProperty="Width" Storyboard.TargetName="cd0"> <DiscreteObjectKeyFrame KeyTime="0" Value="*"/> </ObjectAnimationUsingKeyFrames> </Storyboard> </VisualState> <VisualState x:Name="ExpandRight"> <Storyboard> <ObjectAnimationUsingKeyFrames Duration="0" Storyboard.TargetProperty="(Grid.ColumnSpan)" Storyboard.TargetName="ExpanderButton"> <DiscreteObjectKeyFrame KeyTime="0" Value="1"/> </ObjectAnimationUsingKeyFrames> <ObjectAnimationUsingKeyFrames Duration="0" Storyboard.TargetProperty="(Grid.ColumnSpan)" Storyboard.TargetName="ExpandSite"> <DiscreteObjectKeyFrame KeyTime="0" Value="1"/> </ObjectAnimationUsingKeyFrames> <ObjectAnimationUsingKeyFrames Duration="0" Storyboard.TargetProperty="(Grid.RowSpan)" Storyboard.TargetName="ExpanderButton"> <DiscreteObjectKeyFrame KeyTime="0" Value="2"/> </ObjectAnimationUsingKeyFrames> <ObjectAnimationUsingKeyFrames Duration="0" Storyboard.TargetProperty="(Grid.RowSpan)" Storyboard.TargetName="ExpandSite"> <DiscreteObjectKeyFrame KeyTime="0" Value="2"/> </ObjectAnimationUsingKeyFrames> <ObjectAnimationUsingKeyFrames Duration="0" Storyboard.TargetProperty="(Grid.Row)" Storyboard.TargetName="ExpandSite"> <DiscreteObjectKeyFrame KeyTime="0" Value="0"/> </ObjectAnimationUsingKeyFrames> <ObjectAnimationUsingKeyFrames Duration="0" Storyboard.TargetProperty="(Grid.Column)" Storyboard.TargetName="ExpandSite"> <DiscreteObjectKeyFrame KeyTime="0" Value="1"/> </ObjectAnimationUsingKeyFrames> <ObjectAnimationUsingKeyFrames Duration="0" Storyboard.TargetProperty="Height" Storyboard.TargetName="rd0"> <DiscreteObjectKeyFrame KeyTime="0" Value="*"/> </ObjectAnimationUsingKeyFrames> <ObjectAnimationUsingKeyFrames Duration="0" Storyboard.TargetProperty="Width" Storyboard.TargetName="cd1"> <DiscreteObjectKeyFrame KeyTime="0" Value="*"/> </ObjectAnimationUsingKeyFrames> </Storyboard> </VisualState> </VisualStateGroup> </VisualStateManager.VisualStateGroups> <Border x:Name="Background" BorderBrush="{TemplateBinding BorderBrush}" BorderThickness="{TemplateBinding BorderThickness}" CornerRadius="1,1,1" Padding="{TemplateBinding Padding}"> <Grid> <Grid.ColumnDefinitions> <ColumnDefinition x:Name="cd0" Width="Auto"/> <ColumnDefinition x:Name="cd1" Width="Auto"/> </Grid.ColumnDefinitions> <Grid.RowDefinitions> <RowDefinition x:Name="rd0" Height="Auto"/> <RowDefinition x:Name="rd1" Height="Auto"/> </Grid.RowDefinitions> <toolkit:AccordionButton x:Name="ExpanderButton" Background="{TemplateBinding Background}" ContentTemplate="{TemplateBinding HeaderTemplate}" Content="{TemplateBinding Header}" Foreground="{TemplateBinding Foreground}" FontWeight="{TemplateBinding FontWeight}" FontStyle="{TemplateBinding FontStyle}" FontStretch="{TemplateBinding FontStretch}" FontSize="{TemplateBinding FontSize}" FontFamily="{TemplateBinding FontFamily}" HorizontalAlignment="{TemplateBinding HorizontalAlignment}" HorizontalContentAlignment="{TemplateBinding HorizontalContentAlignment}" IsTabStop="True" IsChecked="{TemplateBinding IsSelected}" Margin="0,0" Padding="0,0" Grid.Row="0" Style="{TemplateBinding AccordionButtonStyle}" VerticalAlignment="{TemplateBinding VerticalAlignment}" VerticalContentAlignment="{TemplateBinding VerticalContentAlignment}"/> <ContentControl x:Name="ExpandSite" ContentTemplate="{TemplateBinding ContentTemplate}" Content="{TemplateBinding Content}" Foreground="{TemplateBinding Foreground}" FontWeight="{TemplateBinding FontWeight}" FontStyle="{TemplateBinding FontStyle}" FontStretch="{TemplateBinding FontStretch}" FontSize="{TemplateBinding FontSize}" FontFamily="{TemplateBinding FontFamily}" HorizontalAlignment="{TemplateBinding HorizontalAlignment}" HorizontalContentAlignment="{TemplateBinding HorizontalContentAlignment}" IsTabStop="False" Margin="0,0" Grid.Row="1" Style="{TemplateBinding ExpandableContentControlStyle}" VerticalAlignment="{TemplateBinding VerticalAlignment}" VerticalContentAlignment="{TemplateBinding VerticalContentAlignment}"/> </Grid> </Border> </Grid> </ControlTemplate> </Setter.Value> </Setter> </Style>
PS.如果要对展开/折叠进行动画处理,您可以在AccordionItem的折叠和展开视觉状态中定义自己的动画.
这真的是一个迟到的答复,希望它可以是任何帮助. 原文链接：/silverlight/597223.html