使用Dapper查詢記錄是否存在

/// <summary>
    /// Dapper數據訪問抽象基礎類
    /// </summary>
    public class DapperHelper
    {
        public static string connectionString = DESEncrypt.Decrypt(ConfigurationManager.ConnectionStrings["SOACon"].ConnectionString);
        /// <summary>
        /// 連接資料庫
        /// </summary>
        /// <returns></returns>
        public static IDbConnection DbConnection()
        {
            var connection = new SqlConnection(connectionString);//連接SQL Server資料庫
            connection.Open();
            return connection;
        }

        /// <summary>
        /// 執行是否存在數據
        /// </summary>
        /// <typeparam name="T"></typeparam>
        /// <param name="sqlStr">查詢（例：SELECT COUNT(1)  FROM XXX ）</param>
        /// <param name="param">匿名類型</param>
        /// <returns></returns>
        public static bool Exists(string sqlStr, Object param)
        {
            using (IDbConnection conn = DapperHelper.DbConnection())
            {
                int count = conn.Query<int>(sqlStr, param).FirstOrDefault();
                return count > 0 ? true : false;
            }
        }
    }

調用：

#region 判斷是否存在庫存（不論熱前還是熱後）

        /// <summary>
        /// 判斷是否存在庫存（不論熱前還是熱後）
        /// </summary>
        /// <param name="processCardNumber">流轉卡號</param>
        /// <returns></returns>
        public bool ExistInventory(string processCardNumber)
        {
            string sqlStr = " SELECT COUNT(1) FROM udtWip_Inventory WHERE processCardNumber=@processCardNumber ";
            return DapperHelper.Exists(sqlStr, new { processCardNumber = processCardNumber });
        }


        #endregion