首頁猿問 WPF中TreeView如何實(shí)現(xiàn)展...

WPF中TreeView如何實(shí)現(xiàn)展開一個節(jié)點(diǎn)其他節(jié)點(diǎn)關(guān)閉？

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胡說叔叔 2018-11-14 19:15:32

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1 回答

慕尼黑8549860

TA貢獻(xiàn)1818條經(jīng)驗獲得超11個贊

樓主可以用兩種思路來解決此問題。
第一種，運(yùn)用TreeView的SelectedItemChanged事件
假設(shè)TreeView控件的name是treeview
c#參考代碼：
private void treeview_SelectedItemChanged(object sender, RoutedPropertyChangedEventArgs<object> e)
{
TreeViewItem selected_item = treeview.SelectedItem as TreeViewItem;
TreeViewItem item;

if (selected_item != null)
{
for (int i = 0; i < treeview.Items.Count; i++)
{
item = treeview.Items[i] as TreeViewItem;

if (item != selected_item)
{
item.IsExpanded = false;
}
}
}
}
第二種思路是更改TreeViewItem的style啦！~
參考代碼：
<Style TargetType="{x:Type TreeViewItem}">
<Style.Triggers>
<MultiTrigger>
<MultiTrigger.Conditions>
<Condition Property="IsSelected" Value="True"/>
<Condition Property="IsFocused" Value="True"/>
</MultiTrigger.Conditions>
<Setter Property="IsExpanded" Value="True"/>
</MultiTrigger>
<Trigger Property="IsSelected" Value="False" >
<Setter Property="IsExpanded" Value="False"/>
</Trigger>
</Style.Triggers>
</Style>