SQL绑定
private void Form1_Load(object sender, System.EventArgs e)
{
//在formload时绑定数据表yg到comboBox1
SqlConnection conn=new SqlConnection("server=.;uid=sa;pwd=;database=gz");
conn.Open();
SqlDataAdapter da=new SqlDataAdapter("select * from yg",conn);
DataSet ds=new DataSet();
da.Fill(ds,"yg");
DataRow dr = ds.Tables["yg"].NewRow();
dr["ygid"] = "0";
dr["ygname"] = "-请选择-";
ds.Tables["yg"].Rows.InsertAt(dr, 0);
this.comboBox1.DataSource=ds.Tables["yg"];
this.comboBox1.DisplayMember="ygname"; //显示的列
this.comboBox1.ValueMember="ygid"; //数据列,次列会在selectedvalue中显示
conn.Close();
} 
access数据库的绑定
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 WindowsApplication1
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
private void Form1_Load(object sender, EventArgs e)
{
string strCon = " Provider = Microsoft.Jet.OLEDB.4.0 ; Data Source = Company.mdb";
OleDbConnection myConn = new OleDbConnection(strCon);
string strCom = " SELECT * FROM company ";
//创建一个 DataSet
DataSet myDataSet = new DataSet();
myConn.Open();
//用 OleDbDataAdapter 得到一个数据集
OleDbDataAdapter myCommand = new OleDbDataAdapter(strCom, myConn);
//把Dataset绑定company数据表
myCommand.Fill(myDataSet, "company");
//关闭此OleDbConnection
myConn.Close();
this.CmbName.DataSource = myDataSet;
this.CmbName.DisplayMember = "company.Name";
this.CmbName.ValueMember = "company.Name";
}
private void CmbName_SelectedIndexChanged(object sender, EventArgs e)
{
string strCon = " Provider = Microsoft.Jet.OLEDB.4.0 ; Data Source = Company.mdb";
OleDbConnection myConn = new OleDbConnection(strCon);
myConn.Open();
string strSQL = "select * from company where company.Name='" + this.CmbName.Text + "'";
OleDbCommand com = new OleDbCommand(strSQL, myConn);
OleDbDataReader read = com.ExecuteReader();
if (read.Read())
{
Address.Text = read["Address"].ToString();
Tel.Text = read["Tel"].ToString();
}
}
}
}