/// <summary>
/// 获取包含指定时间在内的前后共4条记录
/// </summary>
/// <param name="list"></param>
/// <returns></returns>
List <FX_FinanceEconomicsModel> GetFirstLastTwo(List <FX_FinanceEconomicsModel> list)
{
List <FX_FinanceEconomicsModel> newList = new List <FX_FinanceEconomicsModel>();
if (list != null && list.Count > 4)
{
int count = list.Count;
long nowTime = DateExtensions.ConvertDateTimeInt(DateTime.Now);
int index = 0;
foreach (FX_FinanceEconomicsModel m in list)
{
if (m.ReleasedDate >= nowTime)
{
break;
}
else
{
index++;
}
}
if (index == 0 || index == 1)
{
newList = list.Take(4).OrderBy(x => x.ReleasedDate).ToList();
}
else if (index == 2)
{
newList = list.Skip(1).Take(4).OrderBy(x => x.ReleasedDate).ToList();
}
else
{
int addCount = 0;
for (int k = index; k < count; k++)
{
if (addCount < 2)
{
newList.Add(list[k]);
addCount++;
}
else
{
break;
}
}
addCount = newList.Count;
for (int k = index - 1; k > -1; k--)
{
if (addCount < 4)
{
newList.Add(list[k - 1]);
addCount++;
}
else
{
break;
}
}
newList = newList.OrderBy(x => x.ReleasedDate).ToList();
}
return(newList);
}
return(list);
}