Question

而不是指定 “ string [] week_Days = {” Monday“，” Tuesday“ ...};”

如何动态地将天设置为数组？

我尝试解决此问题，但无法以“星期日”作为开始日期-

DateTime days = DateTime.Now;  
string[] weekDays = new string[7];  
for (int i = 0; i < weekDays.Length; i++)  
  {  
    weekDays[i] = string.Format("{0:dddd}", days.AddDays(i));  
    Console.WriteLine(weekDays[i]);     
    days = DateTime.Now;  
  }

输出-

Wednesday  
Thursday  
Friday  
Saturday  
Sunday  
Monday  
Tuesday

Answer 1

您可以使用此LINQ查询。唯一的挑战是获得正确的订单：

DayOfWeek firstWeekDay = DateTimeFormatInfo.CurrentInfo.FirstDayOfWeek;
string[] weekDays = Enum.GetValues(typeof(DayOfWeek)).Cast<DayOfWeek>()
   .OrderBy(dow => dow < firstWeekDay ? 7-(int)dow : dow-firstWeekDay)
   .Select(dow => dow.ToString())
   .ToArray();

也许某人比OrderBy更优雅。

Answer 2

using System;
using System.Globalization;

static void Main()
{
    string[] weekDays = new CultureInfo("en-us").DateTimeFormat.DayNames;
    for (int i = 1; i <= 7; i++)
        Console.WriteLine(weekDays[i % 7]);
}

Answer 3

您可以使用DayOfWeek枚举：

string[] weekdays = Enum.GetNames(typeof(DayOfWeek));

编辑：如果您需要更改一周的开始日期：

private static string[] GetWeekdays(DayOfWeek firstDayOfWeek)
{
    string[] weekdays = new string[7];
    DateTime dateTime = DateTime.Now;
    while (dateTime.DayOfWeek != firstDayOfWeek)
    {
        // Find the next date with start day of week
        dateTime = dateTime.AddDays(1); 
    }
    for (int i = 0; i < 7; i++)
    {
        // Get day of week of current day, add 1 day, iterate 7 times.
        weekdays[i] = dateTime.DayOfWeek.ToString();
        dateTime = dateTime.AddDays(1);
    }
    return weekdays;
}

Answer 4

string[] week_Days = new string[7];  
DayOfWeek day = DayOfWeek.Sunday;  
for (int i = 0; i < week_Days.Length; i++)  
 {  
    week_Days[i] = day.ToString();  
    Console.WriteLine(week_Days[i]);  
    day++;  
 }

使用DayOfWeek代替分配DateTime属性。可以轻松解决问题。

Answer 5

您的代码失败，因为DateTime.Now并不总是在星期日：

DateTime days = DateTime.Now;

最好使用现有的DayOfWeek枚举：

 string[] weekdays = Enum.GetNames(typeof(DayOfWeek));

Answer 6

这也可以通过这种方式完成。在获得“星期一”之前，将日期添加到DateTime.Now中。

int j = 0;
string[] weekDays = new string[7];
DateTime days = DateTime.Now;

while (weekDays[0] != "Sunday")
{ 
    days = days.AddDays(j++);
    weekDays[0] = string.Format("{0:dddd}", days);
    if (weekDays[0] != "Sunday")
       days = DateTime.Now;  
}

for (int i = 0; i < weekDays.Length; i++)
{
    weekDays[i] = string.Format("{0:dddd}", days.AddDays(i));
    Console.WriteLine(weekDays[i]);   
}

Answer 7

Console.WriteLine(new System.Globalization.CultureInfo("en-us").DateTimeFormat.DayNames[byte.Parse(Console.ReadLine()) % 7]);

如何在C＃中动态创建一个星期的数组？

7 个答案: