c# – 使用月历来获取所选周的星期六日期值

// This function will return the next saturday for a datetime
DateTime NextSaturday(DateTime now)
{
   while (now.DayOfWeek != DayOfWeek.Saturday)
      now = now.AddDays(1);
   return now;
}

UPDATE

差不多2年后,我想改变这个答案.

这些天我永远不会为一个类创建一个“实用功能”.我现在总是“延伸”课程.签名现在应该是DateTime.Next(DayOfWeek).有关扩展的更多详细信息,请参见http://msdn.microsoft.com/en-us/library/vstudio/bb383977.aspx.

逻辑也错了.如果现在是星期六,那么它将始终返回当前日期.我想大多数来电者都希望现在7天回来.所以第一个变化是：

DateTime NextSaturday(DateTime now)
{
   do {
      now = now.AddDays(1);
   } while (now.DayOfWeek != DayOfWeek.Saturday)

   return now;
 }

然后将功能更改为与一周中的任何一天一起使用：

DateTime Next(DateTime now,DayOfWeek nextDay)
{
   do {
      now = now.AddDays(1);
   } while (now.DayOfWeek != nextDay)

   return now;
 }

现在“扩展”DateTime类以支持Next(DayOfWeek)

namespace DateTime.Extensions
 {
   public static class DateTimeExtensions
   {
     public static DateTime Next(this DateTime now,DayOfWeek nextDay)
     {
        do {
          now = now.AddDays(1);
        } while (now.DayOfWeek != nextDay)

        return now;
      }
   }
 }