/// <summary>
/// 计算当前周
/// </summary>
/// <returns></returns>
public static int GetWeekNoNow(string time)
{
string systemStartDate = CCAConfig.SystemStartDate;
if (string.IsNullOrEmpty(systemStartDate)) throw new Exception("Not config system start date");
DateTime startDate = DateTime.Parse(systemStartDate);
int str = new System.Globalization.GregorianCalendar().GetWeekOfYear(startDate, System.Globalization.CalendarWeekRule.FirstDay, DayOfWeek.Monday);
int strNow = new System.Globalization.GregorianCalendar().GetWeekOfYear(DateTime.Now, System.Globalization.CalendarWeekRule.FirstDay, DayOfWeek.Monday);
int weekNo = strNow - str + 1; // base on 1
return weekNo;
}