常用方法

#region Dapper 資料庫操作


        #region Query 操作

        /// <summary>
        /// 無參獲取單個實體modle
        /// </summary>
        /// <param name="sqlstr"></param>
        /// <returns>T</returns>
        public static T QueryModel<T>(string sqlstr) where T : new()
        {

            T t 
 
= new T();
            using (MySqlConnection connection = new MySqlConnection(connectionString))
            {

                try
                {
                    connection.Open();
                    t = connection.QueryFirstOrDefault<T>(sqlstr);
                }
                catch
 
 (MySql.Data.MySqlClient.MySqlException ex)
                {
                    //throw new Exception(ex.Message);
                    connection.Close();
                }
            }

            return t;
        }


        /// <summary>
        /// 引數化獲取單個實體modle 
        /// </summary>
        ///
 
 <param name="sqlstr">執行sql語句</param>
        /// <param name="parms">引數陣列</param>
        /// <returns>T</returns>
        public static T QueryModel<T>(string sqlstr, params MySqlParameter[] parms) where T : new()
        {

            T t = new T();
            using (MySqlConnection connection = new MySqlConnection(connectionString))
            {

                try
                {
                    connection.Open();
                    var args = new DynamicParameters(new { });
                    foreach (MySqlParameter parm in parms)
                    {
                        args.Add(parm.ParameterName,parm.Value);
                    }
                    t = connection.QueryFirstOrDefault<T>(sqlstr,args);
                                   
                }
                catch (MySql.Data.MySqlClient.MySqlException ex)
                {
                    //throw new Exception(ex.Message);
                    connection.Close();
                }
            }

            return t;
        }

        /// <summary>
        /// 獲取多個實體modle
        /// </summary>
        /// <param name="sqlString">查詢語句</param>
        /// <returns>List<T></returns>
        public static List<T> QueryModelList<T>(string sqlString) where T : new()
        {

            List<T> tlist = new List<T>();
            using (MySqlConnection connection = new MySqlConnection(DbHelperMySQL.connectionString))
            {

                try
                {
                    connection.Open();
                    tlist = connection.Query<T>(sqlString).ToList();
                }
                catch (MySql.Data.MySqlClient.MySqlException ex)
                {
                    //throw new Exception(ex.Message);
                    connection.Close();
                }
                return tlist;
            }
        }

        /// <summary>
        ///  引數化獲取多個實體modle
        /// </summary>
        /// <param name="sqlString">查詢語句</param>
        /// <returns>List<T></returns>
        public static List<T> QueryModelList<T>(string sqlString, params MySqlParameter[] parms) where T : new()
        {

            List<T> tlist = new List<T>();
            using (MySqlConnection connection = new MySqlConnection(DbHelperMySQL.connectionString))
            {

                try
                {
                    connection.Open();
                    var args = new DynamicParameters(new { });
                    foreach (MySqlParameter parm in parms)
                    {
                        args.Add(parm.ParameterName, parm.Value);
                    }
                    tlist = connection.Query<T>(sqlString, args).ToList();
                }
                catch (MySql.Data.MySqlClient.MySqlException ex)
                {
                    //throw new Exception(ex.Message);
                    connection.Close();
                }
                return tlist;
            }
        }


        #endregion


        #region Execute  操作

        /// <summary>
        /// 單條執行一條sql資料
        /// </summary>
        /// <param name="sqlstr">執行語句</param>
        /// <returns></returns>
        public static int Execute(string sqlstr)
        {
            int obj = 0;
            using (MySqlConnection connection = new MySqlConnection(connectionString))
            {

                try
                {
                    connection.Open();
                    obj = connection.Execute(sqlstr);
                }
                catch (MySql.Data.MySqlClient.MySqlException ex)
                {
                    //throw new Exception(ex.Message);
                    connection.Close();

                }
            }

            return obj;
        }


        /// <summary>
        /// 引數化單條執行一條sql資料
        /// </summary>
        /// <param name="sqlstr">執行語句</param>
        /// <returns></returns>
        public static int Execute(string sqlstr, params MySqlParameter[] parms)
        {
            int obj = 0;
            using (MySqlConnection connection = new MySqlConnection(connectionString))
            {

                try
                {
                    connection.Open();
                    var args = new DynamicParameters(new { });
                    foreach (MySqlParameter parm in parms)
                    {
                        args.Add(parm.ParameterName, parm.Value);
                    }
                    obj = connection.Execute(sqlstr, args);
                }
                catch (MySql.Data.MySqlClient.MySqlException ex)
                {
                    //throw new Exception(ex.Message);
                    connection.Close();

                }
            }

            return obj;
        }






        #endregion




        #endregion