关于entity的使用

首先建立对应于相关数据表的类，主要处理基本的数据业务逻辑。

然后将对应的实体模型进行引入：

例程如下：

      private OMSSEntities1 _mwtsEntities;

       public OMSSEntities1 MwtsEntities
       {
           get
           {
               if (_mwtsEntities == null)
                   _mwtsEntities = new OMSSEntities1();
               return _mwtsEntities;
           }
       }

 

然后添加：

using System.Data.Objects;

 

才会有：

public IQueryable< SchedulBackHistory > GQueryableSchedule()
       {
           MwtsEntities.SchedulBackHistories.MergeOption = MergeOption.OverwriteChanges;
           return MwtsEntities.SchedulBackHistories.AsQueryable();
       }