- ///系统引用
- using System.Data;
- using System.Data.OleDb;
- using System.Data.SqlClient;
- ///
- /// 必需的设计器变量。
- ///
- private System.ComponentModel.Container components = null;
- private System.Data.DataSet myDataSet;
- C#连接数据库代码-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 = ../../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!" ) ;
- }
- }
C#连接数据库代码就介绍到这里。
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