学步园

1. 给节点前面加图标
   (1) 先定义ImageList
   (2) -行为 ImageList   设为定义的ImageList
2. 添加节点
   TreeNode node = new TreeNode("...");
   treeView1.Nodes[0].Nodes.Add(node);
   treeView1.SelectedNode = node;        //选中该节点
3. 重命名节点   
   (1) -行为  LabelEdit    True         //设置节点可编辑
   (2) TreeNode node = treeView1.SelectedNode;
       node.BeginEdit();
   (3) 编辑完后会触发AfterLabelEdit事件
private void treeView1_AfterLabelEdit(object sender,NodeLabelEditEventArgs e)
{
     if (e.Label == null || e.Label.Trim() == "")
     {
         e.CancelEdit = true;
         return;
     }
     ...
}
4. 按F2键快速重命名 
 private void treeView1_KeyUp(object sender, KeyEventArgs e)
 {
      if (e.KeyValue == 113)            
      {  ...... }    
 }
 5. 删除节点
 string name = treeView1.SelectedNode.Text;
 DialogResult r = MessageBox.Show("确定删除 \"" + name + "\" 吗？", "",  
                                   MessageBoxButtons.YesNo);
 if (r == DialogResult.Yes)
 {   treeView1.Nodes[0].Nodes.Remove(treeView1.SelectedNode);    }
6. 右击菜单功能
   先添加ContextMenuStrip 组件 
 private void treeView1_MouseDown(object sender, MouseEventArgs e)
 {     if (e.Button == MouseButtons.Right)
       {     contextMenuStrip1.Show(this, new Point(e.X, e.Y));        }
 }