/// <summary>
/// 获取季度的第一天
/// </summary>
/// <param name="month">2018Q1</param>
/// <returns></returns>
public static DateTime ToQuarterFirstday(string quarter)
{
if (quarter == "")
{
quarter = ConvertDateTime.ToYearQuarterString();
}
int yearIndex = ConvertObject.ToInt32(quarter.Substring(0, 4));
int quarterIndex = ConvertObject.ToInt32(quarter.Substring(5, 1));
switch (quarterIndex)
{
case 4:
return(new DateTime(yearIndex, 10, 1));
case 3:
return(new DateTime(yearIndex, 7, 1));
case 2:
return(new DateTime(yearIndex, 4, 1));
default:
return(new DateTime(yearIndex, 1, 1));
}
}
/// <summary>
/// 获取当前日期所在的周日期
/// </summary>
/// <returns></returns>
public static string[] GetWeekDays(DateTime date)
{
// int dateIndex = (int)date.DayOfWeek;
int dateIndex = ((int)date.DayOfWeek) == 0 ? 7 : (int)date.DayOfWeek;
String[] weekdays =
{
ConvertDateTime.ToDayString(date.AddDays(1 - dateIndex)),
ConvertDateTime.ToDayString(date.AddDays(2 - dateIndex)),
ConvertDateTime.ToDayString(date.AddDays(3 - dateIndex)),
ConvertDateTime.ToDayString(date.AddDays(4 - dateIndex)),
ConvertDateTime.ToDayString(date.AddDays(5 - dateIndex)),
ConvertDateTime.ToDayString(date.AddDays(6 - dateIndex)),
ConvertDateTime.ToDayString(date.AddDays(7 - dateIndex))
};
return(weekdays);
}