[英]accessing control item when given inner template element
我有一個TreeviewItem
,其style
設置為此
<Style x:Key="TreeViewItemStyle" TargetType="TreeViewItem">
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="TreeViewItem">
<StackPanel x:Name="stackpanel" Orientation="Horizontal">
<CheckBox x:Name="checkbox_treeview" Checked="treeView_AfterCheck" Unchecked="treeView_AfterCheck"/>
<Image x:Name="image_treeview" Width="16"/>
<local:WPFEditableTextBlock x:Name="label_TreeView" Text="{TemplateBinding Header}"/>
</StackPanel>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
我可以通過執行此操作來訪問模板的checkbox
TreeViewItem folderNode = new TreeViewItem();
Style style = this.FindResource("TreeViewItemStyle") as Style;
folderNode.Style = style;
ControlTemplate controlTemplate = folderNode.Template;
var templatedControl = folderNode.Template.LoadContent() as FrameworkElement;
CheckBox chbx = (CheckBox)templatedControl.FindName("checkbox_treeview");
一旦能夠訪問此checkbox
,便可以轉到已checked
事件處理程序。 在其中,我希望能夠訪問包含該checkbox
的treeViewItem
,但是我不知道如何執行此操作。 請幫幫我!!!
要從模板中定義的checkbox
訪問treeViewItem
,可以通過xaml在Tag
屬性中將其傳遞,如下所示:
<ControlTemplate TargetType="TreeViewItem">
<StackPanel x:Name="stackpanel" Orientation="Horizontal">
<CheckBox x:Name="checkbox_treeview" Tag="{Binding RelativeSource={RelativeSource AncestorType={x:Type TreeViewItem}}}" Checked="treeView_AfterCheck" Unchecked="treeView_AfterCheck"/>
<Image x:Name="image_treeview" Width="16"/>
<local:WPFEditableTextBlock x:Name="label_TreeView" Text="{TemplateBinding Header}"/>
</StackPanel>
</ControlTemplate>
以及如何從事件處理程序中檢索它:
private void treeView_AfterCheck(object sender, RoutedEventArgs e)
{
var tvi = ((sender as CheckBox).Tag as TreeViewItem);
}
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