monthex.cs

windows modile 编程．实现简单的crm功能

using System;

namespace Opportune.CalEx
{
	class MonthEx
	{
		public enum IN_WHICH_MONTH
		{
			IN_PREV_MONTH = -1,
			IN_CURRENT_MONTH = 0,
			IN_NEXT_MONTH = 1
		}
		public struct MyDate
		{
			public DateTime date;
			public  IN_WHICH_MONTH month;
		}

		static public int DATECOUNT = 42;
		private MyDate[] _dates;
		private int _year;
		private int _month;

		public MonthEx(int year, int month)
		{
			DateTime first;
			try
			{
				first = new DateTime(year, month, 1);
			}
			catch (Exception exc)
			{
				throw exc;
			}
			_year = year;
			_month = month;
			_dates = new MyDate[DATECOUNT];
			int i, c;
			if (first.DayOfWeek == DayOfWeek.Monday)
				c = 1;
			else if (first.DayOfWeek == DayOfWeek.Tuesday)
				c = 2;
			else if (first.DayOfWeek == DayOfWeek.Wednesday)
				c = 3;
			else if (first.DayOfWeek == DayOfWeek.Thursday)
				c = 4;
			else if (first.DayOfWeek == DayOfWeek.Friday)
				c = 5;
			else if (first.DayOfWeek == DayOfWeek.Saturday)
				c = 6;
			else
				c = 7;
			for (i = 0; i < c; i++)
			{
				TimeSpan aaa = new TimeSpan(c - i, 0, 0, 0, 0);
				_dates[i].date = first - aaa;
				_dates[i].month = IN_WHICH_MONTH.IN_PREV_MONTH;
			}
			for (; i < 42; i++)
			{
				TimeSpan bbb = new TimeSpan(i - c, 0, 0, 0, 0);
				_dates[i].date = first + bbb;
				if (_dates[i].date.Month == month)
					_dates[i].month = IN_WHICH_MONTH.IN_CURRENT_MONTH;
				else
					_dates[i].month = IN_WHICH_MONTH.IN_NEXT_MONTH;
			}
		}

		public int Year
		{
			get
			{
				return _year;
			}
		}
		public int Month
		{
			get
			{
				return _month;
			}
		}
		public MyDate[] Dates
		{
			get
			{
				return _dates;
			}
		}
		public MonthEx PrevMonth
		{
			get
			{
				DateTime t = new DateTime(_year, _month, 1);
				TimeSpan s = new TimeSpan (1,0,0,0);
				DateTime d = t - s;
				return new MonthEx(d.Year, d.Month);
			}
		}
		public MonthEx NextMonth
		{
			get
			{
				DateTime t = new DateTime(_year, _month, 1);
				TimeSpan s = new TimeSpan(31, 0, 0, 0);
				DateTime d = t + s;
				return new MonthEx(d.Year, d.Month);
			}
		}
	}
}