C# 公共控件之TreeView

Posted 2022-12-08 无声蝉

1、初始化控件，添加根节点，子节点

public Form1()

    InitializeComponent();
    InitTreeView();

private void InitTreeView()

    TreeNode parrentNode1 = treeView1.Nodes.Add("父节点1");
    parrentNode1.Nodes.Add("子节点1");
    parrentNode1.Nodes.Add("子节点2");
    TreeNode parrentNode2 = treeView1.Nodes.Add("父节点2");
    parrentNode2.Nodes.Add("子节点1");
    parrentNode2.Nodes.Add("子节点2");

2、添加treeview菜单contextMenuStrip1，contextMenuStrip2 ，右键操作

private void treeView1_MouseDown(object sender, MouseEventArgs e)

    if (e.Button == MouseButtons.Right)
    
        Point ClickPoint = new Point(e.X, e.Y);
        int x = e.X;
        int y = e.Y;
        TreeNode CurrentNode = treeView1.GetNodeAt(ClickPoint);
        if (CurrentNode is TreeNode)//判断你点的是不是一个节点
        
            treeView1.SelectedNode = CurrentNode;
            CurrentNode.ContextMenuStrip = this.contextMenuStrip1;
            contextMenuStrip1.Show(MousePosition);
        
        else
        
            treeView1.ContextMenuStrip = this.contextMenuStrip2;
            contextMenuStrip2.Show(MousePosition);
        
    

3、菜单操作

private void 添加子节点ToolStripMenuItem_Click(object sender, EventArgs e)

    treeView1.SelectedNode.Nodes.Add("新节点");


private void 删除当前节点ToolStripMenuItem_Click(object sender, EventArgs e)

    treeView1.SelectedNode.Remove();


private void 添加根节点ToolStripMenuItem_Click(object sender, EventArgs e)

    treeView1.Nodes.Add("父节点");


private void 清空ToolStripMenuItem_Click(object sender, EventArgs e)

    treeView1.Nodes.Clear();


private void 重命名ToolStripMenuItem_Click(object sender, EventArgs e)

    treeView1.LabelEdit = true;//不可缺少
    treeView1.SelectedNode.BeginEdit();

4、添加 双击节点，编辑重命名

private void treeView_DoubleClick(object sender, EventArgs e)

    treeView1.LabelEdit = true;//不可缺少
    treeView1.SelectedNode.BeginEdit();