针对access数据库的增删改查

1、执行查询操作：（ExecuteReader方法）

string myConnectionString = "Provider = Microsoft.Jet.OLEDB.4.0;Data Source = "+Server.MapPath("~/") +"App_Data/access.mdb"; //使用相对路径连接数据库

string mySelectQuery = "select * from login where userName ='lwjj'";//查询语句

OleDbConnection myConnection = new OleDbConnection(myConnectionString);

OleDbCommand myCommand = new OleDbCommand(mySelectQuery, myConnection);

myConnection.Open();

OleDbDataReader myReader = myCommand.ExecuteReader(CommandBehavior.CloseConnection);

while(myReader.Read())
   {
      Console.WriteLine(myReader.GetString(0));
      //GetString(0,1,2....)
   }
   myReader.Close();

2、执行增、删、改操作：（ExecuteNonQuery方法）

 private void dbcz()
    {
        string myConnectionString = "Provider = Microsoft.Jet.OLEDB.4.0;Data Source = "+Server.MapPath("~/") +"App_Data/IPTJ.mdb";  //Data Source = 数据库绝对路径

        string myExecuteQuery = "insert into accIP (IP,地址) values ('" + 参数1+ "','" + 参数2+ "')";//增、删、改等语句

        OleDbConnection myConnection = new OleDbConnection(myConnectionString);

        OleDbCommand myCommand = new OleDbCommand(myExecuteQuery,myConnection);

        myCommand.Connection.Open();

        myCommand.ExecuteNonQuery();//返回影响的行数

        myConnection.Close();

    }