复制所有的treeView父视图和子视图到另一个treeView c# WinForms

Question

我试图复制整个树(确切所有节点)的一个树视图(完全)到另一个树视图使用以下代码:

        TreeNodeCollection myTreeNodeCollection = treeView1.Nodes;
        TreeNode[] myTreeNodeArray = new TreeNode[treeView1.Nodes.Count];
        treeView1.Nodes.CopyTo(myTreeNodeArray, 0);
        treeView2.Nodes.AddRange(myTreeNodeArray);

但这不允许我这样做，它要求删除源树视图中的节点或使用它克隆!我该怎么做呢?我不希望我的源树视图在这个过程中失去任何东西。

** UPDATE **好吧，伙计们，我发现了一个复杂的代码(对我来说!!)，但我怎么使用它?

    public static T DeepTreeCopy<T>(T obj)
    {
        object result = null;
        using (var ms = new MemoryStream())
        {
            var formatter = new BinaryFormatter();
            formatter.Serialize(ms, obj);
            ms.Position = 0;
            result = (T)formatter.Deserialize(ms); ms.Close();
        }
        return (T)result;
    } 

Answer 1

try this

public void Copy(TreeView treeview1, TreeView treeview2)
{
    TreeNode newTn;
    foreach (TreeNode tn in treeview1.Nodes)
    {
        newTn = new TreeNode(tn.Text, tn.Value);
        CopyChilds(newTn, tn);
        treeview2.Nodes.Add(newTn);
    }
}
public void CopyChilds(TreeNode parent, TreeNode willCopied)
{
    TreeNode newTn;
    foreach (TreeNode tn in willCopied.ChildNodes)
    {
        newTn = new TreeNode(tn.Text, tn.Value);
        parent.ChildNodes.Add(newTn);
    }
} 

我问候

Answer 2

像MohD的答案一样，但是使用递归来获得所有节点。(子节点的节点)

    public void CopyTreeNodes(TreeView treeview1, TreeView treeview2)
    {
        TreeNode newTn;
        foreach (TreeNode tn in treeview1.Nodes)
        {
            newTn = new TreeNode(tn.Text, tn.ImageIndex, tn.SelectedImageIndex);
            CopyChildren(newTn, tn);
            treeview2.Nodes.Add(newTn);
        }
    }
    public void CopyChildren(TreeNode parent, TreeNode original)
    {
        TreeNode newTn;
        foreach (TreeNode tn in original.Nodes)
        {
            newTn = new TreeNode(tn.Text, tn.ImageIndex, tn.SelectedImageIndex);
            parent.Nodes.Add(newTn);
            CopyChildren(newTn, tn);
        }
    } 

Answer 3

使用node.Clone()函数也可以…

foreach (TreeNode node in treeViewSource.Nodes)
{
    treeViewTarget.Nodes.Add((TreeNode)node.Clone());
}

添加根节点将有助于确保"plus - minus"功能是可见的。

TreeNode rootNode = new TreeNode("Root Node");
treeViewTarget.Nodes.Add(rootNode);
foreach (TreeNode node in treeViewSource.Nodes)
{
    rootNode.Nodes.Add((TreeNode)node.Clone());
}
rootNode.Expand();

Answer 4

谢谢大家的回答。把所有的答案结合起来，这对我来说很有效。即使树视图有多个层次

  public void CopyTreeNodes(TreeView treeview1, TreeView treeview2)
    {
        TreeNode newTn;
        foreach (TreeNode tn in treeview1.Nodes)
        {
            newTn = new TreeNode(tn.Text, tn.Value);
            CopyChildren(newTn, tn);
            treeview2.Nodes.Add(newTn);
        }
    }
 public void CopyChildren(TreeNode parent, TreeNode original)
    {
        TreeNode newTn;
        foreach (TreeNode tn in original.ChildNodes)
        {
            newTn = new TreeNode(tn.Text, tn.Value);
            parent.ChildNodes.Add(newTn);
            CopyChildren(newTn, tn);
        }
    }

Answer 5

您可以在所需的级别使用

     public void RootCopy(TreeView treeview1, TreeView treeview2)
    {
        TreeNode newNode;
        foreach (TreeNode tnode in treeview1.Nodes)
        {
            newNode = new TreeNode(tnode.Text);
            treeview2.Nodes.Add(newNode);
            if (tnode.Nodes.Count != 0)
            {
                int _1index = tnode.Index;
                ChildsCopyLevel2(_1index, treeview1, treeview2);
            }

        }
    }

    public void ChildsCopyLevel2(int index1, TreeView TV1, TreeView TV2)
    {
        foreach (TreeNode Tnode in TV1.Nodes[index1].Nodes)
        {
            string Childtext = Tnode.Text;
            TV2.Nodes[index1].Nodes.Add(Childtext);
            if (Tnode.Nodes.Count != 0)
            {// ChildsCopyLevel3(Tnode.Nodes.Count, TV1, TV2);
                int _2index = Tnode.Index;
                ChildsCopyLevel3(index1, _2index, TV1, TV2);
            }
        }
    }

    public void ChildsCopyLevel3(int index1, int index2, TreeView TV1, TreeView TV2)
    {
        foreach (TreeNode Tnode in TV1.Nodes[index1].Nodes[index2].Nodes)
        {
            string Childtext = Tnode.Text;
            TV2.Nodes[index1].Nodes[index2].Nodes.Add(Childtext);
        }
    }