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  • MVC+LINQToSQL的Repository模式之(三)Repository模式实现统一CURD操作,实现EF中的Find主键查找

    namespace Data.TEST
    {
        /// <summary>
        /// 数据通用操作实现
        /// </summary>
        /// <typeparam name="TEntity"></typeparam>
        public class Repository<TEntity> : TESTRepositoryBase, IRepository<TEntity> where TEntity : class,IEntity
        {
            #region IRepository<TEntity> 成员
    
            public void Update(TEntity entity)
            {
                TEntity originalEntity = this.Find(entity.PrimaryKey);
                EmitMapper.ObjectMapperManager.DefaultInstance.GetMapper<TEntity, TEntity>().Map(entity, originalEntity);
                base.SubmitChanges();
            }
    
            public void Update(IList<TEntity> list)
            {
                TEntity originalEntity = null;
                list.ToList().ForEach(entity =>
                {
                    originalEntity = this.Find(entity.PrimaryKey);
                    EmitMapper.ObjectMapperManager.DefaultInstance.GetMapper<TEntity, TEntity>().Map(entity, originalEntity);
                });
                base.SubmitChanges();
            }
    
            public void Insert(TEntity entity)
            {
                this._db.GetTable<TEntity>().InsertOnSubmit(entity);
                base.SubmitChanges();
            }
    
            public void Insert(IList<TEntity> list)
            {
                list.ToList().ForEach(entity =>
                {
                    this._db.GetTable<TEntity>().InsertOnSubmit(entity);
                });
                base.SubmitChanges();
            }
    
            public TEntity InsertGetIDENTITY(TEntity entity)
            {
                this._db.GetTable<TEntity>().InsertOnSubmit(entity);
                base.SubmitChanges();
                return this.Find(entity.PrimaryKey);
            }
    
            public void Delete(TEntity entity)
            {
                this._db.GetTable<TEntity>().DeleteOnSubmit(entity);
                base.SubmitChanges();
            }
    
            public IQueryable<TEntity> GetModel()
            {
                this._db.Refresh(System.Data.Linq.RefreshMode.OverwriteCurrentValues, this.DbSet);//解决频繁刷新数据问题
                return this.DbSet;
            }
    
            public TEntity Find(params object[] keyValues)
            {
                var mapping = _db.Mapping.GetTable(typeof(TEntity));
                var keys = mapping.RowType.IdentityMembers.Select((m, i) => m.Name + " = @" + i).ToArray();
                return this.DbSet.Where(String.Join(" && ", keys), keyValues).FirstOrDefault();
            }
    
            /// <summary>
            /// 泛型数据表属性
            /// </summary>
            private IQueryable<TEntity> DbSet
            {
    
                get
                {
                    return this._db.GetTable<TEntity>();
                }
    
            }
            #endregion
        }
    }
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  • 原文地址:https://www.cnblogs.com/lori/p/2241028.html
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