A System.DateTime extension method that ends of week. - CSharp System

CSharp examples for System:DateTime Week

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Description

A System.DateTime extension method that ends of week.

Demo Code

// Licensed under MIT License (MIT) (https://github.com/zzzprojects/Z.ExtensionMethods)
using System;//from  w ww.jav  a 2s.  c om

public class Main{
        /// <summary>
    ///     A System.DateTime extension method that ends of week.
    /// </summary>
    /// <param name="dt">Date/Time of the dt.</param>
    /// <param name="startDayOfWeek">(Optional) the start day of week.</param>
    /// <returns>A DateTime.</returns>
    public static DateTime EndOfWeek(this DateTime dt, DayOfWeek startDayOfWeek = DayOfWeek.Sunday)
    {
        DateTime end = dt;
        DayOfWeek endDayOfWeek = startDayOfWeek - 1;
        if (endDayOfWeek < 0)
        {
            endDayOfWeek = DayOfWeek.Saturday;
        }

        if (end.DayOfWeek != endDayOfWeek)
        {
            if (endDayOfWeek < end.DayOfWeek)
            {
                end = end.AddDays(7 - (end.DayOfWeek - endDayOfWeek));
            }
            else
            {
                end = end.AddDays(endDayOfWeek - end.DayOfWeek);
            }
        }

        return new DateTime(end.Year, end.Month, end.Day, 23, 59, 59, 999);
    }
}

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