如何展开所有的treeview节点？

[long709420776]

如题

[asdfsadfasdfafa]

在treeviewitem对应的数据中添加isopen属性，对应绑定的treeviewitem的展开属性上

[天天天蓝]

TreeView.ExpandAll()

[jv9]

使用IsExpanded = true属性就可以实现，详细请看：

<Button x:Name="btnExpand" HorizontalAlignment="Left" VerticalAlignment="Bottom" Width="75" Content="Expand All" Margin="0,0,0,176" Click="btnExpand_Click"/>

private void btnExpand_Click(object sender, System.Windows.RoutedEventArgs e)
{
for (int i = 0; i < MyTreeView.Items.Count; i++)
{
ExpandAllTreeViewItems((TreeViewItem)MyTreeView.ItemContainerGenerator.ContainerFromIndex(i));
}
}


private void ExpandAllTreeViewItems(TreeViewItem currentTreeViewItem)
{
if (!currentTreeViewItem.IsExpanded)
{
currentTreeViewItem.IsExpanded = true;
currentTreeViewItem.Dispatcher.BeginInvoke(() => ExpandAllTreeViewItems(currentTreeViewItem));
}
else
{
for (int i = 0; i < currentTreeViewItem.Items.Count; i++)
{
TreeViewItem child = (TreeViewItem)currentTreeViewItem.ItemContainerGenerator.ContainerFromIndex(i);
ExpandAllTreeViewItems(child);
}
}
}

[qq5457237]

递归获取所有的Item，然后将展开的属性赋为True