///系统引用
using System.Data;
using System.Data.OleDb;using System.Data.SqlClient;/// <summary>
/// 必需的设计器变量。/// </summary>private System.ComponentModel.Container components = null;private System.Data.DataSet myDataSet;c#本地MDB数据库连接
private void menuItem2_Click(object sender, System.EventArgs e){ try { //创建一个 OleDbConnection对象 string strCon = " Provider = Microsoft.Jet.OLEDB.4.0 ; Data Source = http://www.cnblogs.com/database/MDB数据库名称.mdb" ; OleDbConnection myConn = new OleDbConnection ( strCon ) ; string strCom = " SELECT * FROM 数据表名称" ; //创建一个 DataSet对象 myDataSet = new DataSet ( ) ; myConn.Open ( ) ; OleDbDataAdapter myCommand = new OleDbDataAdapter ( strCom , myConn ) ; myCommand.Fill ( myDataSet , "数据表名称" ) ; myConn.Close ( ) ; //关闭连接 statusBar1.Text="本地MDB数据库连接成功"; } catch ( Exception ex ) { statusBar1.Text="本地MDB数据库连接失败"; MessageBox.Show ( "连接本地MDB数据库发生错误:" + ex.ToString ( ) , "错误!" ) ; }}c#远程MDB数据库连接c#本地SQL数据库连接private void menuItem3_Click(object sender, System.EventArgs e){ try { //创建一个 SqlConnection对象 string strCon = "Integrated Security=SSPI;Initial Catalog='数据库名称';Data Source='本地计算机名';User ID='登录用户名';Password='登录用户密码';Connect Timeout=30"; SqlConnection myConn = new SqlConnection ( strCon ) ; string strCom = " SELECT * FROM 数据表名称" ; //创建一个 DataSet对象 myDataSet = new DataSet ( ) ; myConn.Open ( ) ; SqlDataAdapter myCommand = new SqlDataAdapter ( strCom , myConn ) ; myCommand.Fill ( myDataSet , "数据表名称" ) ; myConn.Close ( ) ; //关闭连接 statusBar1.Text="本地SQL数据库连接成功"; } catch ( Exception ex1 ) { statusBar1.Text="本地SQL数据库连接失败"; MessageBox.Show ( "连接本地SQL数据库发生错误:" + ex1.ToString ( ) , "错误!" ) ;}}c#远程SQL数据库连接private void menuItem10_Click(object sender, System.EventArgs e){ try { //创建一个SqlConnection对象 string strCon = "Initial Catalog='数据库名称';Server='远程IP地址,1433';User ID='登录用户名';Password='登录用户密码';Persist Security Info=True"; SqlConnection myConn = new SqlConnection ( strCon ) ; string strCom = " SELECT * FROM 数据表名称" ; //创建一个 DataSet对象 myDataSet = new DataSet ( ) ; myConn.Open ( ) ; SqlDataAdapter myCommand = new SqlDataAdapter ( strCom , myConn ) ; myCommand.Fill ( myDataSet , "数据表名称" ) ; myConn.Close ( ) ; //关闭连接 statusBar1.Text="远程SQL数据库连接成功"; } catch ( Exception ex2 ) { statusBar1.Text="连接远程SQL数据库失败"; MessageBox.Show ( "连接远程SQL数据库发生错误:" + ex2.ToString ( ) , "错误!" ) ; }}