Question

我需要能够（在一周中的任何一天）捕获即将到来的星期一日期。如果这个语法在星期一运行，我需要以mm.dd.yyyy的格式捕获下一个星期一的日期。我知道如何以该格式捕捉日期，但我将如何捕捉即将到来的星期一？

Answer 1

这是一个微不足道的问题。一个简单的循环可以做到，但可能有一堆更优化的解决方案：

namespace ConsoleApplication1
{
    using System;

    internal class Program
    {       
        private static void Main(string[] args)
        {
            var arbitraryDate = DateTime.Today;

            do
            {
                arbitraryDate = arbitraryDate.AddDays(1);
            }
            while (arbitraryDate.DayOfWeek != DayOfWeek.Monday);

            Console.WriteLine(arbitraryDate.ToString("MM.dd.yyyy"));
        }
    }

}

Answer 2

您可以使用通用扩展方法：

/// <summary>
/// Returns the first occurrence of the specified weekday following (or on) the current System.DateTime object.
/// </summary>
/// <param name="currentDate">The current date</param>
/// <param name="dayOfWeek">The weekday to find</param>
/// <param name="includeCurrentDate">Include the current date as a valid result</param>
/// <returns>The first date of the weekday after (or on) the current System.DateTime object.</returns>
public static DateTime NextWeekday(this DateTime currentDate, DayOfWeek dayOfWeek, bool includeCurrentDate)
{
    int daysInWeek = 7;
    int offset = includeCurrentDate ? 0 : 1;
    int days = (dayOfWeek - currentDate.AddDays(offset).DayOfWeek + daysInWeek) % daysInWeek;
    return currentDate.AddDays(days + offset);
}

捕获星期一的日期

2 个答案: