public class Form1 : Form
{
private ComboBox ComboBox1 ;
private Button button1 ;
private System.Data.DataSet myDataSet ;
private System.ComponentModel.Container components = null ;

public Form1 ( )
{
file://打开数据链接，得到数据集
GetConnect ( ) ;
InitializeComponent ( ) ;
}
file://清除程序中使用过的资源
protected override void Dispose ( bool disposing )
{
if ( disposing )
{
if ( components != null )
{
components.Dispose ( ) ;
}
}
base.Dispose ( disposing ) ;
}

private void GetConnect ( )
{
file://创建一个 OleDbConnection
string strCon = " Provider = Microsoft.Jet.OLEDB.4.0 ; Data Source = db.mdb" ;
OleDbConnection myConn = new OleDbConnection ( strCon ) ;
string strCom = " SELECT * FROM person " ;
file://创建一个 DataSet
myDataSet = new DataSet ( ) ;

myConn.Open ( ) ;
file://用 OleDbDataAdapter 得到一个数据集
OleDbDataAdapter myCommand = new OleDbDataAdapter ( strCom , myConn ) ;
file://把Dataset绑定person数据表
myCommand.Fill ( myDataSet , "person" ) ;
file://关闭此OleDbConnection
myConn.Close ( ) ;

}

private void button1_Click ( object sender , System.EventArgs e )
{
ComboBox1.DataSource = myDataSet ;
ComboBox1.DisplayMember = "person.xm" ;
ComboBox1.ValueMember = "person.xm" ;
}
static void Main ( )
{
Application.Run ( new Form1 ( ) ) ;
}
}

public class Form1 : Form
{
private ComboBox ComboBox1 ;
private Button button1 ;
private System.Data.DataSet myDataSet ;
private System.ComponentModel.Container components = null ;

public Form1 ( )
{
file://打开数据链接，得到数据集
GetConnect ( ) ;
InitializeComponent ( ) ;
}
file://清除程序中使用过的资源
protected override void Dispose ( bool disposing )
{
if ( disposing )
{
if ( components != null )
{
components.Dispose ( ) ;
}
}
base.Dispose ( disposing ) ;
}

private void GetConnect ( )
{
// 设定数据连接字符串，此字符串的意思是打开Sql server数据库，服务器名称为server1,数据库为data1
string strCon = "Provider = SQLOLEDB.1 ; Persist Security Info = False ; User ID = sa ; Initial Catalog = data1 ; Data Source = server1 " ;
OleDbConnection myConn = new OleDbConnection ( strCon ) ;
myConn.Open ( ) ;
string strCom = " SELECT * FROM person " ;
file://创建一个 DataSet
myDataSet = new DataSet ( ) ;
file://用 OleDbDataAdapter 得到一个数据集
OleDbDataAdapter myCommand = new OleDbDataAdapter ( strCom , myConn ) ;
file://把Dataset绑定person数据表
myCommand.Fill ( myDataSet , " person " ) ;
file://关闭此OleDbConnection
myConn.Close ( ) ;
}
private void button1_Click ( object sender , System.EventArgs e )
{
ComboBox1.DataSource = myDataSet ;
ComboBox1.DisplayMember = "person.xm" ;
ComboBox1.ValueMember = "person.xm" ;
}
static void Main ( )
{
Application.Run ( new Form1 ( ) ) ;
}
}