using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;namespace WindowsFormsApplication2
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
} private void tbnode_TextChanged(object sender, EventArgs e)
{ } private void Form1_Load(object sender, EventArgs e)
{
TreeNode RootNode =new TreeNode("北京信息科技大学",0,0);
trdep.Nodes.Add(RootNode);
TreeNode subnode1 = new TreeNode("信息管理学院", 1, 1);
RootNode.Nodes.Add(subnode1);
TreeNode subnode2 = new TreeNode("计算机学院", 1, 1);
RootNode.Nodes.Add(subnode2);
TreeNode subnode3 = new TreeNode("自动化学院", 1, 1);
RootNode.Nodes.Add(subnode3);
TreeNode subnode4=new TreeNode("经济管理学院",1,1);
RootNode.Nodes.Add(subnode4);
} private void btnadd_Click(object sender, EventArgs e)
{
TreeNode newNode = new TreeNode(tbnode.Text,0,0);
trdep.Nodes.Add(newNode);
} private void benaddsub_Click(object sender, EventArgs e)
{
TreeNode selectedNode = trdep.SelectedNode;
if (selectedNode == null)
{
MessageBox.Show("添加子节点之前必须先选中一个根节点。");
}
TreeNode newNode=new TreeNode(tbnode.Text,1,1);
selectedNode.Nodes.Add(newNode);
selectedNode.SelectedImageIndex=1;
selectedNode.Expand();
} private void btndel_Click(object sender, EventArgs e)
{
TreeNode selectedNode = trdep.SelectedNode;
if (selectedNode == null)
{
MessageBox.Show("删除节点之前必须选中一个节点");
return;
}
TreeNode parentNode = selectedNode.Parent;
if (parentNode == null)
trdep.Nodes.Remove(selectedNode);
else
{
parentNode.Nodes.Remove(selectedNode);
if (parentNode.Nodes.Count == 0)
{
parentNode.ImageIndex = 1;
parentNode.SelectedImageIndex = 1;
}
}
} private void btnclose_Click(object sender, EventArgs e)
{
this.Close();
}
private void trdep_AfterExpand(object sender, System.Windows.Forms.TreeViewEventArgs e)
{
e.Node.ImageIndex = 1;
e.Node.SelectedImageIndex = 1;
}
private void trdep_AfterExpand(object sender, System.Windows.Forms.TreeViewEventArgs e)
{
e.Node.ImageIndex = 0;
e.Node.SelectedImageIndex = 0;
}
}
}
}
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;namespace WindowsFormsApplication2
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
} private void tbnode_TextChanged(object sender, EventArgs e)
{ } private void Form1_Load(object sender, EventArgs e)
{
TreeNode RootNode =new TreeNode("北京信息科技大学",0,0);
trdep.Nodes.Add(RootNode);
TreeNode subnode1 = new TreeNode("信息管理学院", 1, 1);
RootNode.Nodes.Add(subnode1);
TreeNode subnode2 = new TreeNode("计算机学院", 1, 1);
RootNode.Nodes.Add(subnode2);
TreeNode subnode3 = new TreeNode("自动化学院", 1, 1);
RootNode.Nodes.Add(subnode3);
TreeNode subnode4=new TreeNode("经济管理学院",1,1);
RootNode.Nodes.Add(subnode4);
} private void btnadd_Click(object sender, EventArgs e)
{
TreeNode newNode = new TreeNode(tbnode.Text,0,0);
trdep.Nodes.Add(newNode);
} private void benaddsub_Click(object sender, EventArgs e)
{
TreeNode selectedNode = trdep.SelectedNode;
if (selectedNode == null)
{
MessageBox.Show("添加子节点之前必须先选中一个根节点。");
}
TreeNode newNode=new TreeNode(tbnode.Text,1,1);
selectedNode.Nodes.Add(newNode);
selectedNode.SelectedImageIndex=1;
selectedNode.Expand();
} private void btndel_Click(object sender, EventArgs e)
{
TreeNode selectedNode = trdep.SelectedNode;
if (selectedNode == null)
{
MessageBox.Show("删除节点之前必须选中一个节点");
return;
}
TreeNode parentNode = selectedNode.Parent;
if (parentNode == null)
trdep.Nodes.Remove(selectedNode);
else
{
parentNode.Nodes.Remove(selectedNode);
if (parentNode.Nodes.Count == 0)
{
parentNode.ImageIndex = 1;
parentNode.SelectedImageIndex = 1;
}
}
} private void btnclose_Click(object sender, EventArgs e)
{
this.Close();
}
private void trdep_AfterExpand(object sender, System.Windows.Forms.TreeViewEventArgs e)
{
e.Node.ImageIndex = 1;
e.Node.SelectedImageIndex = 1;
}
private void trdep_AfterExpand(object sender, System.Windows.Forms.TreeViewEventArgs e)
{
e.Node.ImageIndex = 0;
e.Node.SelectedImageIndex = 0;
}
}
}
}
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