我有MVVM应用程序。在主窗口中,我将网格放在2列以下。在第2列中,我放置了WPF扩展器,并将其默认设置为折叠状态(IsExpanded =“ False”)。当应用程序执行时,我希望网格列1填充网格的整个宽度,并且网格列2填充宽度0(折叠)。因此,当我单击扩展器时,我希望网格列2扩展为0.47 *的宽度。然后,如果我再次单击扩展器,我希望网格列1填充网格的整个宽度,并且网格列2可以折叠(宽度= 0)。我怎样才能做到这一点?下面的代码不起作用。
<Grid x:Name="Grid">
<Grid.RowDefinitions>
<RowDefinition Height="47.5*" />
<RowDefinition Height="auto" />
</Grid.RowDefinitions>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="*" />
<ColumnDefinition Width="0.47*" />
</Grid.ColumnDefinitions>
<controls:UCIndicationsOfUse Grid.Row="0" Grid.Column="0"
HorizontalAlignment="Stretch"
VerticalAlignment="Stretch"
Width="auto"
Height="auto"
DataContext="{Binding}" />
<controls:UCPData Grid.Row="1" Grid.Column="0"
HorizontalAlignment="Stretch"
VerticalAlignment="Stretch"
Width="auto"
Height="auto"
DataContext="{Binding}" />
<Expander Grid.Row="0"
Grid.RowSpan="2"
Grid.Column="1"
Width="25"
ExpandDirection="Left"
IsExpanded="False"
HorizontalAlignment="Right">
<Expander.Header>
<TextBlock Text="Settings">
<TextBlock.LayoutTransform>
<RotateTransform Angle="-90"/>
</TextBlock.LayoutTransform>
</TextBlock>
</Expander.Header>
</Expander>
答案 0 :(得分:0)
最后,我已将Collapsed和Expanded事件添加到扩展器:
<Expander Grid.Row="0"
Grid.RowSpan="2"
Grid.Column="1"
Width="25"
Collapsed="Expander_Collapsed"
Expanded="Expander_Expanded"
ExpandDirection="Left"
IsExpanded="False"
HorizontalAlignment="Right">
<Expander.Header>
<TextBlock Text="Settings">
<TextBlock.LayoutTransform>
<RotateTransform Angle="-90"/>
</TextBlock.LayoutTransform>
</TextBlock>
</Expander.Header>
</Expander>
然后从后面的代码中查看:
private void Expander_Collapsed(object sender, RoutedEventArgs e)
{
ColumnDefinition c = this.Grid.ColumnDefinitions[1];
c.Width = new GridLength(0, GridUnitType.Auto);
this.Grid.ColumnDefinitions.RemoveAt(1);
this.Grid.ColumnDefinitions.Insert(1, c);
}
private void Expander_Expanded(object sender, RoutedEventArgs e)
{
ColumnDefinition c = this.Grid.ColumnDefinitions[1];
c.Width = new GridLength(0.47, GridUnitType.Star);
this.Grid.ColumnDefinitions.RemoveAt(1);
this.Grid.ColumnDefinitions.Insert(1, c);
}
我认为这不会破坏MVVM模式,因为这是视图任务。