using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
namespace Tree
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
private void button1_Click(object sender, EventArgs e)
{
string type = textBox1.Text.Trim();
TreeNode rootNode;
rootNode = this.treeView1.Nodes.Add(type);
}
private void button2_Click(object sender, EventArgs e)
{
if(this.textBox1.Text!=string.Empty){
string type = textBox1.Text.Trim();
treeView1.SelectedNode.Nodes.Add(type);
treeView1.ExpandAll();
}
}
private void 删除ToolStripMenuItem_Click(object sender, EventArgs e)
{
TreeNode type = treeView1.SelectedNode;
type.Remove();
}
private void 修改ToolStripMenuItem_Click(object sender, EventArgs e)
{
if(this.treeView1.SelectedNode!=null){
treeView1.SelectedNode.Text = textBox1.Text;
if(this.treeView1.SelectedNode.Text!=null&&this.treeView1.Nodes.Count==0){
TreeNode type = new TreeNode();
treeView1.ExpandAll();
}
}
}
private void button3_Click(object sender, EventArgs e)
{
}
}
}