#region 根据年月日计算星期几(lblDate.Text=CaculateWeekDay(2010,11,29);)
 /// 根据年月日计算星期几(lblDate.Text=CaculateWeekDay(2010,11,29);)
///年
///月
///日
///
public static string CaculateWeekDay(int y,int m, int d)
{
 if(m==1){m=13};
 if(m==2){m=14};
 int week=(d+2*m+3*(m+1)/5+y+y/4-y/100+y/400)%7+1;
  string weekstr="";
  switch(week)
  {
   case 1: weekstr="星期一"; break;
   case 2: weekstr="星期二"; break;
   case 3: weekstr="星期三"; break;
   case 4: weekstr="星期四"; break;
   case 5: weekstr="星期五"; break;
   case 6: weekstr="星期六"; break;
   case 7: weekstr="星期日"; break;
  }
  return weekstr;
 }
 #endregion