本文整理匯總了VB.NET中System.Windows.Controls.TreeViewItem.ExpandSubtree方法的典型用法代碼示例。如果您正苦於以下問題：VB.NET TreeViewItem.ExpandSubtree方法的具體用法？VB.NET TreeViewItem.ExpandSubtree怎麽用？VB.NET TreeViewItem.ExpandSubtree使用的例子？那麽, 這裏精選的方法代碼示例或許可以為您提供幫助。
在下文中一共展示了TreeViewItem.ExpandSubtree方法的1個代碼示例，這些例子默認根據受歡迎程度排序。您可以為喜歡或者感覺有用的代碼點讚，您的評價將有助於係統推薦出更棒的VB.NET代碼示例。
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