/// <summary>
/// db 的摘要说明
/// </summary>
public class db
{
 public db()
 {
  //
  // TOD 在此处添加构造函数逻辑
  //
 }
  /*  public static SqlConnection createCon()
    {
        return new SqlConnection("server=.;database=ylcg;uid=sa;pwd=123456;");
    }*/
    public static MySQLConnection createCon()
    {
        return new MySQLConnection(new MySQLConnectionString("localhost","ylcg","root","123456").AsString);
    }
   /* public static DataTable ylTable()
    {
        SqlConnection con = db.createCon();
        SqlDataAdapter sda = new SqlDataAdapter();
        sda.SelectCommand = new SqlCommand("select * from yl", con);
        DataSet myds = new DataSet();
        sda.Fill(myds, "yl");
        sda.Dispose();
        con.Close();
        return myds.Tables["yl"];      
    }*/
    public static DataTable ylTable()
    {
        MySQLConnection con = db.createCon();
        MySQLDataAdapter sda = new MySQLDataAdapter();
        sda.SelectCommand = new MySQLCommand("select * from yl",con);
        DataSet myds = new DataSet();
        sda.Fill(myds, "yl");
        sda.Dispose();
        con.Close();
        return myds.Tables["yl"];      
    }
 /*   public static void insertNew(int num)
    {
        SqlConnection con = db.createCon();
        SqlCommand cmd = new SqlCommand();
        try
        {
            for (int i = 0; i < 100; i++)
            {
                string[] times ={"00:10","00:20","00:30","00:40","00:50",
                    "01:10","01:20","01:30","01:40","01:50",
                "02:10","02:20","02:30","02:40","02:50",
                "03:10","03:20","03:30","03:40","03:50",
                "04:10","04:20","04:30","04:40","04:50",
                "05:10","05:20","05:30","05:40","05:50",
                "06:10","06:20","06:30","06:40","06:50",
                 "07:10","07:20","07:30","07:40","07:50",
                 "08:10","08:20","08:30","08:40","09:50",
                 "10:10","10:20","10:30","10:40","10:50",
                 "11:10","11:20","11:30","11:40","11:50",
                "12:10","12:20","12:30","12:40","12:50",
                "13:10","13:20","13:30","13:40","13:50",
                "14:10","14:20","14:30","14:40","14:50",
                "15:10","15:20","15:30","15:40","15:50",
                "16:10","16:20","16:30","16:40","16:50",
                "17:10","17:20","17:30","17:40","17:50",
                "18:10","18:20","18:30","18:40","18:50",
                "19:10","19:20","19:30","19:40","19:50"};
                System.Random r = new Random();
                int myyl = r.Next(1120, 1890);
                string sql = "insert into yl values('" + times[i].ToString() + "'," + myyl + ",11)";
             //   System.Web.HttpContext.Current.Response.Write(sql);
                con.Open();
                cmd.Connection = con;
                cmd.CommandType = CommandType.Text;
                cmd.CommandText = sql;
                cmd.ExecuteNonQuery();
                cmd.Dispose();
                con.Close();
            }
        }
        catch
        {
            System.Web.HttpContext.Current.Response.Write("dd");
        }
      
    }*/
    public static void insertNew(int num)
    {
        MySQLConnection con = db.createCon();
        MySQLCommand cmd = new MySQLCommand();
        try
        {
            for (int i = 0; i < 100; i++)
            {
                string[] times ={"00:10","00:20","00:30","00:40","00:50",
                    "01:10","01:20","01:30","01:40","01:50",
                "02:10","02:20","02:30","02:40","02:50",
                "03:10","03:20","03:30","03:40","03:50",
                "04:10","04:20","04:30","04:40","04:50",
                "05:10","05:20","05:30","05:40","05:50",
                "06:10","06:20","06:30","06:40","06:50",
                 "07:10","07:20","07:30","07:40","07:50",
                 "08:10","08:20","08:30","08:40","09:50",
                 "10:10","10:20","10:30","10:40","10:50",
                 "11:10","11:20","11:30","11:40","11:50",
                "12:10","12:20","12:30","12:40","12:50",
                "13:10","13:20","13:30","13:40","13:50",
                "14:10","14:20","14:30","14:40","14:50",
                "15:10","15:20","15:30","15:40","15:50",
                "16:10","16:20","16:30","16:40","16:50",
                "17:10","17:20","17:30","17:40","17:50",
                "18:10","18:20","18:30","18:40","18:50",
                "19:10","19:20","19:30","19:40","19:50"};
                System.Random r = new Random();
                int myyl = r.Next(1120, 1890);
                string sql = "insert into yl(sendtime,sendvalue,cgID) values('" + times[i].ToString() + "'," + myyl + ",11)";
                //   System.Web.HttpContext.Current.Response.Write(sql);
                con.Open();
                cmd.Connection = con;
                cmd.CommandType = CommandType.Text;
                cmd.CommandText = sql;
                cmd.ExecuteNonQuery();
                cmd.Dispose();
                con.Close();
            }
        }
        catch
        {
            System.Web.HttpContext.Current.Response.Write("dd");
        }

    }    
}
 

mysql> create table yl( ylID int(10) unsigned NOT NULL AUTO_INCREMENT primary ke
y, sendtime varchar(20), sendvalue int(10), cgID int(10) not null) ENGINE=MyISAM
 AUTO_INCREMENT=1 DEFAULT CHARSET=utf8;