ProductionSystem/ProductionSystem_Service/DataProductService.cs

using ProductionSystem_Log;
using ProductionSystem_Model.DbModel;
using ProductionSystem_Model.DbModel.System;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ProductionSystem_Service
{
    public class DataProductService : DbContext
    { 
        /// <summary>
        /// 新增产品数据
        /// </summary>
        /// <param name="t_Data_Product"></param>
        /// <returns></returns>
        public (bool isOk,string msg) AddDataProduct(T_Data_Product t_Data_Product)
        {
            try
            {
                var row = db.Insertable(t_Data_Product).ExecuteCommand();
                return (row > 0, row > 0 ? "操作成功！" : "操作失败！");
            }
            catch (Exception ex)
            {
                var errorMsg = $"执行DataProductService下AddDataProduct时异常：{ex.Message}";
                LogHelper.Error(ex, errorMsg);
                return (false, errorMsg);
            }
        }

        /// <summary>
        /// 根据参数编码和参数类别查询目标值
        /// </summary>
        /// <param name="para_code"></param>
        /// <param name="para_category"></param>
        /// <returns></returns>
        public T_Data_Product QueryDataProductByParaCodeAndParaCategory(string para_code,string para_category)
        {
            try
            {
                return db.Queryable<T_Data_Product>()
               .Where((a) => a.ParaCode == para_code && a.ParaCategory == para_category)
               .Select((a) => new T_Data_Product
               {
                   TargetVal = a.TargetVal
               }).First();
            }
            catch (Exception ex)
            {
                LogHelper.Error(ex, "执行DataProductService下QueryDataProductByParaCodeAndParaCategory时异常");
                return null;
            }           
        }
    }
}