public string Update(Collect c)
{
YogaEntities ey = new YogaEntities();
Collect cc = ey.Collect.FirstOrDefault((ccc) => ccc.Id == c.Id);
if (cc == null) return string.Format("编号为{0}的商品不存在", c.Id);
cc.GoodsId = c.GoodsId;
return ey.SaveChanges() == 1 ? "成功" : "失败";
}
public Collect[] Search(Collect c, DateTime dateStart, DateTime dateEnd, ref int page, int pageSize, out int totalPages)
{
YogaEntities ey = new YogaEntities();
var query = from cc in ey.Collect where cc.Datie >= dateStart && cc.Datie <= dateEnd select cc;
if (c.Id > 0) query = query.Where((cc) => cc.Id == c.Id);
if (c.GoodsId > 0) query = query.Where((cc) => cc.GoodsId == c.GoodsId);
totalPages = (int)Math.Ceiling(query.Count() * 1.0 / pageSize);
if (totalPages < 1)
{
page = 0;
return null;
}
if (page == -1 || page > totalPages) page = totalPages;
else if (page < 1) page = 1;
return query.OrderBy((cc) => cc.Id).Skip((page - 1) * pageSize).Take(pageSize).ToArray();
}
/// <summary>
/// Create a new Collect object.
/// </summary>
/// <param name="id">Initial value of the Id property.</param>
/// <param name="datie">Initial value of the Datie property.</param>
/// <param name="goodsId">Initial value of the GoodsId property.</param>
/// <param name="memberId">Initial value of the MemberId property.</param>
/// <param name="userId">Initial value of the UserId property.</param>
public static Collect CreateCollect(global::System.Int32 id, global::System.DateTime datie, global::System.Int32 goodsId, global::System.Int32 memberId, global::System.Int32 userId)
{
Collect collect = new Collect();
collect.Id = id;
collect.Datie = datie;
collect.GoodsId = goodsId;
collect.MemberId = memberId;
collect.UserId = userId;
return collect;
}
/// <summary>
/// Deprecated Method for adding a new object to the Collect EntitySet. Consider using the .Add method of the associated ObjectSet<T> property instead.
/// </summary>
public void AddToCollect(Collect collect)
{
base.AddObject("Collect", collect);
}
public int Add(Collect a)
{
YogaEntities ey = new YogaEntities();
ey.AddToCollect(a);
return ey.SaveChanges() == 1 ? a.Id : -1;
}