本文整理汇总了VB.NET中System.Windows.Controls.TreeViewItem.ExpandSubtree方法的典型用法代码示例。如果您正苦于以下问题：VB.NET TreeViewItem.ExpandSubtree方法的具体用法？VB.NET TreeViewItem.ExpandSubtree怎么用？VB.NET TreeViewItem.ExpandSubtree使用的例子？那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。
在下文中一共展示了TreeViewItem.ExpandSubtree方法的1个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的VB.NET代码示例。
示例1: GetTreeViewItem
Private Sub expandSelected_Click(ByVal sender As Object, ByVal e As RoutedEventArgs)
If treeView1.SelectedItem Is Nothing Then
Exit Sub
End If
Dim tvi As TreeViewItem =
GetTreeViewItem(treeView1, treeView1.SelectedItem)
If tvi IsNot Nothing Then
tvi.ExpandSubtree()
End If
End Sub
' Traverse the TreeView to find the TreeViewItem
' that corresponds to the selected item.
Private Function GetTreeViewItem(ByVal parent As ItemsControl,
ByVal item As Object) As TreeViewItem
' Check whether the selected item is a direct child of
' the parent ItemsControl.
Dim tvi As TreeViewItem =
TryCast(parent.ItemContainerGenerator.ContainerFromItem(item), TreeViewItem)
If tvi Is Nothing Then
' The selected item is not a child of parent, so check
' the child items of parent.
For Each child As Object In parent.Items
Dim childItem As TreeViewItem =
TryCast(parent.ItemContainerGenerator.ContainerFromItem(child), TreeViewItem)
If childItem IsNot Nothing Then
' Check the next level for the appropriate item.
tvi = GetTreeViewItem(childItem, item)
End If
Next
End If
Return tvi
End Function