VB.NET 如何将子节点添加到树视图中的特定节点
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VB.NET How to add a child node to a specific node in treeview
提问by NetInfo
How to add a child node to a specific node in treeview? Say I have "Item1" in treeview already, how do I add "SubItem1" to "Item1" as it's child node?
如何将子节点添加到树视图中的特定节点？假设我已经在树视图中有“Item1”，如何将“SubItem1”添加到“Item1”作为它的子节点？
I know its probably really simple, but i tried lots of stuff, i just cant get it working.
我知道它可能真的很简单，但我尝试了很多东西，我就是无法让它工作。
回答by msigman
Adding child node to parent (non-selected)
将子节点添加到父节点（未选中）
First use Find()to get a reference to the parent node. Then add it using the same technique as the other sections below.
首先用于Find()获取对父节点的引用。然后使用与下面其他部分相同的技术添加它。
Dim MyNode() As TreeNode
MyNode = TreeView1.Nodes.Find("Item1", True)
MyNode(0).Nodes.Add("SubItem1")
Adding nodes programmatically
以编程方式添加节点
If you want to add the child nodes to a particluar parent node, the idea is to add the child nodes to their parent node by using the parent.node.add()method.
You can create any number of child like this.
如果要将子节点添加到特定的父节点，想法是使用parent.node.add()方法将子节点添加到其父节点。您可以像这样创建任意数量的孩子。
For example if you want to have a scenario like:
例如，如果您想要一个类似的场景：
Grandfather-> Father-> Son
祖父-> 父亲-> 儿子
Then you could do this:
那么你可以这样做：
dim GrandfatherNOde as treenode = tree.nodes.add("Grandfather")
dim fatherNode as treenode = GrandfatherNode.Nodes.add("Father")
dim sonNode as treenode = fatherNode.Nodes.add("Son")
More reading/examples
更多阅读/例子
This page has a good example you can run to dynamically add child nodes to the tree. They do it on a button, which they've hooked up like this:
这个页面有一个很好的例子，你可以运行它来动态地将子节点添加到树中。他们是在一个按钮上完成的，他们是这样连接的：
Private Sub AddChild_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles AddChild.Click
TView.SelectedNode.Nodes.Add(Text1.Text)
End Sub
http://www.codeproject.com/Articles/11830/The-Basic-Operations-on-using-the-TreeView-Control
http://www.codeproject.com/Articles/11830/The-Basic-Operations-on-using-the-TreeView-Control
回答by Mark Hall
If you make sure that you assign a Nameto your TreeNodeYou can use Findto locate it and add the Childnode.
如果您确保将 a 分配Name给您的TreeNode您可以使用Find它来定位它并添加Child节点。
Example:
例子：
Public Class Form1
Dim Nodes(5) As TreeNode
Public Sub New()
' This call is required by the designer.
InitializeComponent()
' Add any initialization after the InitializeComponent() call.
Nodes(0) = New TreeNode("Root")
Nodes(0).Name = "Root"
Nodes(1) = New TreeNode("Item1")
Nodes(1).Name = "Item1"
Nodes(2) = New TreeNode("Item2")
Nodes(2).Name = "Item2"
Nodes(3) = New TreeNode("Item3")
Nodes(3).Name = "Item3"
Nodes(4) = New TreeNode("Item4")
Nodes(4).Name = "Item4"
Nodes(0).Nodes.Add(Nodes(1))
Nodes(0).Nodes.Add(Nodes(2))
Nodes(0).Nodes.Add(Nodes(3))
Nodes(0).Nodes.Add(Nodes(4))
End Sub
Private Sub Button1_Click(sender As System.Object, e As System.EventArgs) Handles Button1.Click
TreeView1.Nodes.Add(Nodes(0))
End Sub
Private Sub Button2_Click(sender As System.Object, e As System.EventArgs) Handles Button2.Click
Dim tmpNode() As TreeNode = TreeView1.Nodes.Find("Item1", True)
'Assuming only one Match
tmpNode(0).Nodes.Add("Child Of Item1")
End Sub
End Class
回答by Gaandi
I was looking for the same thing when i got here, and so far i couldnt get to what i needed.
当我到达这里时，我一直在寻找同样的东西，但到目前为止我无法找到我需要的东西。
So i got to this page: http://www.dotnetspider.com/forum/168335-How-add-node-treeview-VB.NET.aspx
所以我到了这个页面：http: //www.dotnetspider.com/forum/168335-How-add-node-treeview-VB.NET.aspx
Really cool and simple to do after you give it a look.
看完之后真的很酷很简单。
It turn out that we only need to keep typing nodes.add("nodename") to keep adding sublevels. Treeview1.Nodes.Add("Root_1").Nodes.Add("Child_Level_1").Nodes.Add("Child_Level_2")
事实证明，我们只需要继续输入 nodes.add("nodename") 即可继续添加子级别。Treeview1.Nodes.Add("Root_1").Nodes.Add("Child_Level_1").Nodes.Add("Child_Level_2")
Treeview1.Nodes.Add("Root_1").Nodes.Add("Child_Level_1").Nodes.Add("Child_Level_2")
This would get something like:
这会得到类似的东西：
http://img716.imageshack.us/img716/7254/semttulonzk.jpg
http://img716.imageshack.us/img716/7254/semttulonzk.jpg
Hope it Helped ;D.
希望它有所帮助;D。
回答by David Osborne
*Assumes empty TreeView:
*假设空树视图：
Dim rootNode = TreeView1.Nodes.Add("Root")
rootNode.Nodes.Add("SubNode")
