public DateTime GetFirstTransactionDate(DateTime current, DateLevel level)
{
switch (level)
{
case DateLevel.Month:
var startOfMonth = new DateTime(current.Year, current.Month, 1);
return(GetStockTransactionDate(startOfMonth, startOfMonth.AddDays(10)).Min());
case DateLevel.Year:
var startOfYear = new DateTime(current.Year, 1, 1);
return(GetStockTransactionDate(startOfYear, startOfYear.AddDays(10)).Min());
default:
throw new Exception("参数错误！");
}
}
public DateTime GetLastTransactionDate(DateTime current, DateLevel level)
{
switch (level)
{
case DateLevel.Month:
var lastDayOfMonth = new DateTime(current.Year, current.Month + 1, 1).AddDays(-1);
return(GetStockTransactionDate(lastDayOfMonth.AddDays(-10), lastDayOfMonth).Max());
case DateLevel.Year:
var lastDayOfYear = new DateTime(current.Year + 1, 1, 1).AddDays(-1);
return(GetStockTransactionDate(lastDayOfYear.AddDays(-10), lastDayOfYear).Max());
default:
throw new Exception("参数错误！");
}
}