c#运用TreeView控件的树形视图显示数据库中数据

TreeView控件显示数据库,Nodes集合的Add方法. 
Treeview控件的Nodes集合包含多个子节点,节点也可以包含另外的节点.通过节点的backcolor属性设置背景色.

具体代码测试:

using System;

using System.Collections.Generic;

using System.ComponentModel;

using System.Data;

using System.Drawing;

using System.Text;

using System.Windows.Forms;

using System.Data.OleDb;

namespace DataBaseToTreeView

{

public partial class Frm_Main : Form

{

public Frm_Main()

{

InitializeComponent();

}

private void Form1_Load(object sender, EventArgs e)

{

treeView1.ShowLines = true;//设置绘制连线

treeView1.ImageList = imageList1;// codego.net/tags/92/1/ 设置ImageList属性

string P_Connection = string.Format(//创建数据库连接字符串

"Provider=Microsoft.Jet.OLEDB.4.0;Data Source=test.mdb;User Id=Admin");

OleDbConnection P_OLEDBConnection = //创建连接对象

new OleDbConnection(P_Connection);

P_OLEDBConnection.Open();//连接到数据库

OleDbCommand P_OLEDBCommand = new OleDbCommand(//创建命令对象

"select * from [Ware]",

P_OLEDBConnection);

OleDbDataReader P_Reader = //得到数据读取器

P_OLEDBCommand.ExecuteReader();

TreeNode newNode1 = treeView1.Nodes.Add("A","商品信息",1,2);//一级节点

while (P_Reader.Read())

{

TreeNode newNode12 = new TreeNode(//二级节点

"商品编号" + P_Reader[1].ToString(), 3, 4);

newNode12.Nodes.Add("A", "商品名称：" + P_Reader[0].ToString(), 5, 6);

newNode12.Nodes.Add("A", "商品数量：" + P_Reader[3].ToString(), 7, 8);

newNode12.Nodes.Add("A", "商品价格：" + P_Reader[2].ToString(), 9, 10);

newNode1.Nodes.Add(newNode12);//添加节点

}

P_OLEDBConnection.Close();//关闭数据库连接

treeView1.ExpandAll();//展开所有节点

}

}

}