数据库操作

[c#]代码库

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using MySql.Data.MySqlClient;
using System.Data;

namespace MySql_DB
{
    public class DBHelper
    {
        private static string constr = "server=localhost;User Id=root;password=root;Database=dbtest";

        public static int Execute(string sql)
        {
            try
            {
                MySqlConnection con = new MySqlConnection(constr);
                con.Open();
                MySqlCommand com = new MySqlCommand(sql, con);

                int num = com.ExecuteNonQuery();

                con.Close();
                return num;
            }
            catch (Exception ex)
            {
                return 0;
            }
        }

        public static DataSet Select(string sql)
        {
            try
            {
                MySqlConnection con = new MySqlConnection(constr);
                con.Open();

                MySqlDataAdapter mda = new MySqlDataAdapter(sql, con);
                DataSet ds = new DataSet();
                mda.Fill(ds, "table1");
                con.Close();
                return ds;
            }
            catch (Exception ex)
            {
                return null;
            }
        }
    }
}