lj_plc/Actions/ChemicalWeighing/Mesnac.Action.ChemicalWeighing/FreeDb/FreeSqlUnit.cs

using Mesnac.Action.ChemicalWeighing.Sys;
using Mesnac.Codd.Session;

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Mesnac.Action.ChemicalWeighing.FreeDb
{
    public class FreeSqlUnit
    {
        private static IFreeSql _instance = null;

        private FreeSqlUnit() { }

        public static IFreeSql Instance
        {
            get
            {
                if (_instance == null)
                {

                    DbHelper dbHelper = Mesnac.Basic.DataSourceFactory.Instance.GetDbHelper(Mesnac.Basic.DataSourceFactory.MCDbType.Local);

                    _instance = new FreeSql.FreeSqlBuilder()
    .UseConnectionString(FreeSql.DataType.SqlServer, dbHelper.DbSession.ConnectionString)
    .UseAutoSyncStructure(false) //自动同步实体结构到数据库
    .Build(); //请务必定义成 Singleton 单例模式
                }
                return _instance;
            }
        }

        internal static T Select<T>()
        {
            throw new NotImplementedException();
        }
    }
}