public static Printed GetPrinted(int id, string dateFlag)
{
var printed = Context.Printed.FirstOrDefault(p => p.ProductId == id && p.DateFlag == dateFlag);
if (printed == null)
{
printed = new Printed {
ProductId = id, DateFlag = dateFlag, TotalNum = 0
};
Context.Printed.Add(printed);
Context.SaveChanges();
}
return(printed);
}
public static bool SetPrinted(Printed printed, int max, int add)
{
if (printed.TotalNum + add > max)
{
return(false);
}
retry:
try
{
printed.TotalNum += add;
Context.SaveChanges();
return(true);
}
catch (Exception)
{
Thread.Sleep(200);
goto retry;
}
}
