Mega Code Archive
Return the previous business date of the date specified
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// crudwork
// Copyright 2004 by Steve T. Pham (http://www.crudwork.com)
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with This program. If not, see <http://www.gnu.org/licenses/>.
using System;
using System.Collections.Generic;
using System.Text;
namespace crudwork.Utilities
{
/// <summary>
/// Date Utility
/// </summary>
public class DateUtil
{
/// <summary>
/// return the previous business date of the date specified.
/// </summary>
/// <param name="today"></param>
/// <returns></returns>
public static DateTime PreviousBusinessDay(DateTime today)
{
DateTime result;
switch (today.DayOfWeek)
{
case DayOfWeek.Sunday:
result = today.AddDays(-2);
break;
case DayOfWeek.Monday:
result = today.AddDays(-3);
break;
case DayOfWeek.Tuesday:
case DayOfWeek.Wednesday:
case DayOfWeek.Thursday:
case DayOfWeek.Friday:
result = today.AddDays(-1);
break;
case DayOfWeek.Saturday:
result = today.AddDays(-1);
break;
default:
throw new ArgumentOutOfRangeException("DayOfWeek=" + today.DayOfWeek);
}
return ScreenHolidays(result, -1);
}
/// <summary>
/// Return the previous or next business day of the date specified.
/// </summary>
/// <param name="today"></param>
/// <param name="addValue"></param>
/// <returns></returns>
public static DateTime GetBusinessDay(DateTime today, int addValue)
{
#region Sanity Checks
if ((addValue != -1) && (addValue != 1))
throw new ArgumentOutOfRangeException("addValue must be -1 or 1");
#endregion
if (addValue > 0)
return NextBusinessDay(today);
else
return DateUtil.PreviousBusinessDay(today);
}
/// <summary>
/// return the next business date of the date specified.
/// </summary>
/// <param name="today"></param>
/// <returns></returns>
public static DateTime NextBusinessDay(DateTime today)
{
DateTime result;
switch (today.DayOfWeek)
{
case DayOfWeek.Sunday:
case DayOfWeek.Monday:
case DayOfWeek.Tuesday:
case DayOfWeek.Wednesday:
case DayOfWeek.Thursday:
result = today.AddDays(1);
break;
case DayOfWeek.Friday:
result = today.AddDays(3);
break;
case DayOfWeek.Saturday:
result = today.AddDays(2);
break;
default:
throw new ArgumentOutOfRangeException("DayOfWeek=" + today.DayOfWeek);
}
return ScreenHolidays(result, 1);
}
/// <summary>
/// return the mm/dd string of the date specified.
/// </summary>
/// <param name="time"></param>
/// <returns></returns>
public static string MonthDay(DateTime time)
{
return String.Format("{0:00}/{1:00}", time.Month, time.Day);
}
/// <summary>
/// screen for holidays
/// (simple mode)
/// </summary>
/// <param name="result"></param>
/// <param name="addValue"></param>
/// <returns></returns>
public static DateTime ScreenHolidays(DateTime result, int addValue)
{
#region Sanity Checks
if ((addValue != -1) && (addValue != 1))
throw new ArgumentOutOfRangeException("addValue must be -1 or 1");
#endregion
// holidays on fixed date
switch (MonthDay(result))
{
case "01/01": // Happy New Year
case "07/04": // Independent Day
case "12/25": // Christmas
return GetBusinessDay(result, addValue);
default:
return result;
}
}
}
}
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