[英]How do I move the scroll element in another UserControl with wpf?
How do I bind an element in another usercontrol to a command target? 如何将另一个用户控件中的元素绑定到命令目标?
This is main xaml 这是主要的XAML
<Grid>
<StackPanel>
<Button Height="200" x:Name="PageUpButton" FontFamily="Marlett" FontSize="40" Content="5" Command="{x:Static ScrollBar.PageUpCommand}" CommandTarget="{Binding ElementName=scrollViewerActive}"/>
<local:posMenuChild x:Name="PosMenuChild"/>
<Button Height="200" x:Name="PageDownButton" FontFamily="Marlett" FontSize="40" Content="6" Command="{x:Static ScrollBar.PageDownCommand}" CommandTarget="{Binding ElementName=ScrollViewerActive }"/>
</StackPanel>
</Grid>
What should I specify as CommandTarget? 我应该指定什么作为CommandTarget? How do I scroll the element in the following UserControl with the Button in the top Window? 如何使用顶部窗口中的按钮滚动以下UserControl中的元素?
This is usercontrol 这是用户控制
<Grid Height="200">
<WrapPanel Orientation="Vertical" Height="200">
<ScrollViewer VerticalScrollBarVisibility="Hidden" Name="ScrollViewerActive" CanContentScroll="True" >
<StackPanel>
<TextBlock Text="Test1" FontSize="35"/>
<TextBlock Text="Test2" FontSize="35"/>
<TextBlock Text="Test3" FontSize="35"/>
<TextBlock Text="Test4" FontSize="35"/>
<TextBlock Text="Test5" FontSize="35"/>
<TextBlock Text="Test6" FontSize="35"/>
</StackPanel>
</ScrollViewer>
</WrapPanel>
</Grid>
Modify your usercontrol's code-behind with following: 使用以下命令修改用户控件的代码背后:
First, add a DependencyProperty
to bind to of a ScrollViewer
type 首先,添加一个DependencyProperty
以绑定到ScrollViewer
类型
public static readonly DependencyProperty ScrollTargetProperty = DependencyProperty.RegisterAttached(
"ScrollTarget", typeof(ScrollViewer), typeof(UserControl1), new PropertyMetadata(null));
public static void SetScrollTarget(DependencyObject element, ScrollViewer value)
{
element.SetValue(ScrollTargetProperty, value);
}
public static ScrollViewer GetScrollTarget(DependencyObject element)
{
return (ScrollViewer)element.GetValue(ScrollTargetProperty);
}
Don't forget to change UserControl1
to your usercontrol's class name. 不要忘记将UserControl1
更改为用户控件的类名。
Then, set this property to ScrollViewerActive
(i did it inside the control's constructor) 然后,将此属性设置为ScrollViewerActive
(我在控件的构造函数中完成此操作)
SetScrollTarget(this, ScrollViewerActive);
And now you can bind to it like this 现在您可以像这样绑定它
<Button Command="{x:Static ScrollBar.PageUpCommand}" CommandTarget="{Binding Path=ScrollTarget, ElementName=PosMenuChild, Mode=OneWay}"/>
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