我目前有一个WPF树视图,其结构为:
--> Group 1 (Hierarchical Group)
---> Group 2 (Hierarchical Group)
---> Item 1
---> Item 2
---> Item 3
我目前有一个SelectedItemChanged事件处理程序,像这样连接到该树视图
private void TreeViewControl_SelectedItemChanged(object sender, RoutedPropertyChangedEventArgs<object> e)
{
if (e.NewValue is Item)
{
Item item = e.NewValue as Item;
if (Item != SelectedItem)
{
//keep SelectedItem in sync with Treeview.SelectedItem
SelectedItem = e.NewValue as Item;
}
}
else
{
//if the user tries to select an object that isn't an Item (i.e. a group) reselect the first Item in that group
//This will then cause stack overflow in methods I've tried so far
}
}
所以我的问题是,如何使树状视图的SelectedItem与后面代码中的SelectedItem属性保持同步;如果用户选择了一个组,又如何重新选择项目?
编辑:
<TreeView Grid.Row="1" Grid.RowSpan="2"
ItemContainerStyle="{StaticResource StandardListStyle}"
ItemTemplate="{StaticResource TreeViewItemTemplate}"
BorderThickness="1,0,1,1"
VerticalContentAlignment="Stretch"
HorizontalAlignment="Stretch"
ItemsSource="{Binding Teams}"
SelectedItemChanged="TreeViewControl_SelectedItemChanged"
Loaded="OnTreeViewLoaded"
x:Name="TreeViewControl">
哪里:
Teams = List<HierachicalGroup>;
以及:
public class HierachicalGroup
{
public virtual string Name { get; set; }
public virtual HierachicalGroup[] Children { get; set; }
public virtual HierachicalGroup Parent { get; set; }
}
项目是:
public class Item: HierachicalGroup
{
public Domain Domain { get; set; }
public override string Name
{
get
{
return Domain.DomainName;
}
}
}
最佳答案
在TreeView.SelectedItemChanged事件中,我们得到e.NewValue,它是TreeViewItem的类型,因此我认为您可以在选择组时使用以下代码选择一个项目。
var item = (e.NewValue as TreeViewItem);
if (item.Items.Count > 0)
{
(item.Items[0] as TreeViewItem).IsSelected = true;
}
关于c# - 在SelectedItemChanged事件中更改WPF TreeView SelectedItem,我们在Stack Overflow上找到一个类似的问题:https://stackoverflow.com/questions/24756011/