public static bool Delete(string id)
{
if (!General.IsNullable(id))
{
using (WMContext context = new WMContext())
{
ShopCars model = context.ShopCars.Find(id);
if (model != null)
{
context.ShopCars.Remove(model);
context.SaveChanges();
return(false);
}
}
}
return(false);
}
public bool Add()
{
if (this.Valid())
{
this.Id = General.UniqueString(this.Id);
this.AddDate = DateTime.Now;
using (WMContext context = new WMContext())
{
ShopCars model = (
from car in context.ShopCars
where car.UserId.Equals(this.UserId) &&
car.GoodId.Equals(this.GoodId)
select car
).FirstOrDefault();
if (model != null)
{
model.Price = this.Price;
model.Count += this.Count;
}
else
{
model = new ShopCars {
Id = this.Id,
GoodId = this.GoodId,
UserId = this.UserId,
Price = this.Price,
Count = this.Count,
AddDate = this.AddDate
};
context.ShopCars.Add(model);
}
context.SaveChanges();
}
return(true);
}
return(false);
}
public static bool UpdateCount(string id, int count = 1)
{
if (!General.IsNullable(id))
{
using (WMContext context = new WMContext())
{
ShopCars model = context.ShopCars.Find(id);
if (model != null)
{
if ((model.Count + count) > 0)
{
model.Count += count;
context.SaveChanges();
return(true);
}
}
}
}
return(false);
}
/// <summary>
/// 添加新的购物车信息，如果购物信息已存在，则追加相应购买数量
/// </summary>
/// <returns>操作成功返回True，否则返回False</returns>
public bool Add()
{
if (this.Valid())
{
this.Id = General.UniqueString(this.Id);
this.AddDate = DateTime.Now;
using (WMContext context = new WMContext())
{
ShopCars model = (
from car in context.ShopCars
where car.UserId.Equals(this.UserId)
&& car.GoodId.Equals(this.GoodId)
select car
).FirstOrDefault();
if (model != null)
{
model.Price = this.Price;
model.Count += this.Count;
}
else
{
model = new ShopCars {
Id = this.Id,
GoodId = this.GoodId,
UserId = this.UserId,
Price = this.Price,
Count = this.Count,
AddDate = this.AddDate
};
context.ShopCars.Add(model);
}
context.SaveChanges();
}
return true;
}
return false;
}