经常要需要得出某一日期是星期几,或者需要在一个星期段中获取数据
下面是实现方法，有3段程序，分别为"数据绑定"过程，"上一周"和"下一周"按钮
说明:当点击上一周,求出Session[StartDate]和Session[DueDate],然后根据这个时间段,来求数据.
//iWeek.ToString()为第几周
//dStartDate.Month.ToString()在一个星期段中开始月份
//dStartDate.Day.ToString()在一个星期段中开始日期
//dDueDate.Month.ToString()在一个星期段中结束月份
//dDueDate.Day.ToString()在一个星期段中结束日期
//Session[StartDate]和Session[DueDate]就是时间段了
1.数据绑定过程
private void InitFormData()
{
System.Globalization.Calendar ce = new GregorianCalendar();
int iWeek = ce.GetWeekOfYear(DateTime.Now, CalendarWeekRule.FirstFullWeek, DayOfWeek.Monday);
int iDay = (int) DateTime.Now.DayOfWeek;
DateTime dStartDate = DateTime.Now.AddDays( -(iDay - 1));
DateTime dDueDate = DateTime.Now.AddDays( -(iDay - 1) + 6 );
Session["StartDate"] = dStartDate.ToShortDateString() + " 0:00:00";
Session["DueDate"] = dDueDate.ToShortDateString() + " 23:59:59";
}
2.上一周按钮事件
1private void btnPrevious_Click(object sender, System.EventArgs e)
{
2
System.Globalization.Calendar ce = new GregorianCalendar();
3 DateTime dStartDate = DateTime.Parse(Session["StartDate"].ToString()).AddDays( - 7 );
4 DateTime dDueDate = DateTime.Parse(Session["DueDate"].ToString()).AddDays( - 7 );
5 Session["StartDate"] = dStartDate.ToShortDateString() + " 0:00:00";
6 Session["DueDate"] = dDueDate.ToShortDateString() + " 23:59:59";
7 int iWeek = ce.GetWeekOfYear(dStartDate, CalendarWeekRule.FirstFullWeek, DayOfWeek.Monday);
8
}
3.下一周按钮事件
1
private void btnNext_Click(object sender, System.EventArgs e)
2{
3System.Globalization.Calendar ce = new GregorianCalendar();
4 DateTime dStartDate = DateTime.Parse(Session["StartDate"].ToString()).AddDays( 7 );
5 DateTime dDueDate = DateTime.Parse(Session["DueDate"].ToString()).AddDays( 7 );
6 Session["StartDate"] = dStartDate.ToShortDateString() + " 0:00:00";
Session["DueDate"] = dDueDate.ToShortDateString() + " 23:59:59";
7int iWeek = ce.GetWeekOfYear(dStartDate, CalendarWeekRule.FirstFullWeek, DayOfWeek.Monday);
8 }