简洁的MysqlHelper

把MySqlXXX的类更改为SqlXXX就可以成为sqlHelper.

另外C#也提供了MysqlHelper和sqlHelper，用起来也挺方便的。

public class MySqlHelper
    {
      private static readonly  string connstr = ConfigurationManager.ConnectionStrings["connstr"].ConnectionString;
        public MySqlConnection CreateConnection()
        {
            MySqlConnection conn = new MySqlConnection(connstr);
            conn.Open();
            return conn;
        }
        public int ExecuteNonQuery(string sql,params MySqlParameter[]parameters)
        {
            using (MySqlConnection conn=CreateConnection())
            using(MySqlCommand cmd=conn.CreateCommand())
            {
                cmd.CommandText = sql;
                cmd.Parameters.AddRange(parameters);
               return cmd.ExecuteNonQuery();
            }
        }
        public object ExecuteScalar(string sql,params MySqlParameter[]parameters)
        {
            using (MySqlConnection conn=CreateConnection())
            using (MySqlCommand cmd=conn.CreateCommand())
            {
                cmd.CommandText = sql;
                cmd.Parameters.AddRange(parameters);
               return cmd.ExecuteScalar();
            }
           
        }
       
        public MySqlDataReader ExecuteReader(string sql,params MySqlParameter[]ps)
        {
            using (MySqlConnection conn=CreateConnection())
            using(MySqlCommand cmd=conn.CreateCommand())
            {
                cmd.CommandText = sql;
                if (ps!=null)
                {
                    cmd.Parameters.AddRange(ps);
                }
               return cmd.ExecuteReader();
            }
        }
        public DataTable ExecuteDataTable(string sql,params MySqlParameter[]ps)
        {
            DataTable table = new DataTable();
            using (MySqlConnection conn=CreateConnection())
            using(MySqlCommand cmd=conn.CreateCommand())
            {
                cmd.CommandText = sql;
                if (ps!=null)
                {
                    cmd.Parameters.AddRange(ps);
                }
                using ( MySqlDataAdapter adapter = new MySqlDataAdapter(cmd))
                {
                    adapter.Fill(table);
                }
                return table;
            }
        }
    }