c#TreeView 控件的使用
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 TreeView
{
public partial class Form1 : Form.
{
public Form1()
{
InitializeComponent();
TreeNode tnode = new TreeNode("山东");
tvNo1.Nodes.Add(tnode);
}
/// /// 展开子节点 /// /// ///
private void btnExpand_Click(object sender, EventArgs e)
{ tvNo1.SelectedNode.Expand(); } /
// /// 展开所有节点 /// /// ///
private void btnExpandAll_Click(object sender, EventArgs e)
{ tvNo1.SelectedNode = tvNo1.Nodes[0];
tvNo1.SelectedNode.ExpandAll(); }
/// /// 折叠所有节点 /// /// ///
private void btnCollaspeAll_Click(object sender, EventArgs e)
{ tvNo1.SelectedNode = tvNo1.Nodes[0]; tvNo1.SelectedNode.Collapse(); }
/// /// 实现增加子节点 /// /// ///
private void menuItem1_Click(object sender, EventArgs e)
{ AddNode(); }
/// /// 实现增加兄弟节点 /// /// ///
private void menuItem2_Click(object sender, EventArgs e)
{ AddParentNode(); }
/// /// 实现删除节点 /// /// ///
private void menuItem3_Click(object sender, EventArgs e)
{ DeleteNode(); }
/// /// 加入子节点 ///
private void AddNode()
{
if (tvNo1.SelectedNode == null)
{ MessageBox.Show("请选择一个节点", "提示信息", MessageBoxButtons.OK, MessageBoxIcon.Information); }
else
{
if (txtNodeName.Text != "")
{
TreeNode childNode;
childNode = new TreeNode(txtNodeName.Text);
tvNo1.SelectedNode.Nodes.Add(childNode);
tvNo1.SelectedNode = childNode;
tvNo1.ExpandAll();
}
else
{
MessageBox.Show("TextBox组建必须填入节点名称", "提示信息", MessageBoxButtons.OK, MessageBoxIcon.Information); return;
} } }
/// /// 加入兄弟节点 ///
private void AddParentNode()
{
if (tvNo1.SelectedNode == null)
{ MessageBox.Show("请选择一个节点", "提示信息", MessageBoxButtons.OK, MessageBoxIcon.Information); return; }
else
{
if (txtNodeName.Text != "")
{ TreeNode parentNode = new TreeNode(txtNodeName.Text); tvNo1.SelectedNode.Parent.Nodes.Add(parentNode);
tvNo1.SelectedNode = parentNode; tvNo1.ExpandAll();
} else
{ MessageBox.Show("TextBox组建必须填入节点名称", "提示信息", MessageBoxButtons.OK, MessageBoxIcon.Information);
return;
} }
TreeNode tNode = new TreeNode(txtNodeName.Text);
} /// /// 删除节点 ///
private void DeleteNode()
{
if (tvNo1.SelectedNode.Nodes.Count == 0)
{ tvNo1.SelectedNode.Remove(); }
else
{ MessageBox.Show("请先删除此节点中的子节点", "提示信息", MessageBoxButtons.OK, MessageBoxIcon.Information);
return;
} }
/// /// 鼠标右击功能实现增加删除节点选项 /// /// ///
private void tvNo1_MouseDown(object sender, MouseEventArgs e)
{
if (e.Button == MouseButtons.Right)
{ contextMenu1.Show(this, new Point(e.X, e.Y));
}
}
}
}
来自 “ ITPUB博客 ” ，链接：https://blog.itpub.net/28311102/viewspace-748027/ ，如需转载，请注明出处，否则将追究法律责任。
