Returns the date of the last day of the week for the specified datetime For example, if Monday is considered the start of the week: "2015-05-13" would return "2015-05-17" from http:stackoverflow.coma380641755417 - CSharp System

CSharp examples for System:DateTime Week

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Description

Returns the date of the last day of the week for the specified datetime For example, if Monday is considered the start of the week: "2015-05-13" would return "2015-05-17" from http:stackoverflow.coma380641755417

Demo Code

// Copyright by the Spark Development Network
using System;//from   ww  w.  ja v  a 2s .co  m

public class Main{
        /// <summary>
        /// Returns the date of the last day of the week for the specified date/time
        /// For example, if Monday is considered the start of the week: "2015-05-13" would return "2015-05-17"
        /// from http://stackoverflow.com/a/38064/1755417
        /// </summary>
        /// <param name="dt">The dt.</param>
        /// <param name="startOfWeek">The start of week.</param>
        /// <returns></returns>
        public static DateTime EndOfWeek( this DateTime dt, DayOfWeek startOfWeek )
        {
            return dt.StartOfWeek( startOfWeek ).AddDays( 6 );
        }
        /// <summary>
        /// Returns the date of the start of the week for the specified date/time
        /// For example, if Monday is considered the start of the week: "2015-05-13" would return "2015-05-11"
        /// from http://stackoverflow.com/a/38064/1755417
        /// </summary>
        /// <param name="dt">The dt.</param>
        /// <param name="startOfWeek">The start of week.</param>
        /// <returns></returns>
        public static DateTime StartOfWeek( this DateTime dt, DayOfWeek startOfWeek )
        {
            int diff = dt.DayOfWeek - startOfWeek;
            if ( diff < 0 )
            {
                diff += 7;
            }

            return dt.AddDays( -1 * diff ).Date;
        }
}

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