C＃中的全年日历

Question

所以一直想看看如何用C＃编写日历，如果您使用asp.net，这很容易。 但是，我正在使用控制台应用程序，因为我需要这样做。 现在写一个月的代码还不错，但是我不知道如何编码一整年（1月至12月）。

namespace ConsoleApplication6
{
    class Program
    {
        static void Main(string[] args)
        {
            int current = 0;
            int skip = 0;
            int day = 1;
            int endDay = 31;
            string line = "  Sun Mon Tue Wed Thu Fri Sat";
            Console.WriteLine(line);
            line = "";
            while (skip < current)
            {
                line += "    ";
                skip++;
            }
            while (day <= endDay)
            {
                while (current < 7 && day <= endDay)
                {
                    line += String.Format("{0,4}", day);
                    current++;
                    day++;
                }

                Console.WriteLine(line);
                line = "";
                current = 0;
            }
            Console.ReadLine();
        }
    }
}

这样做之后，这将显示一个月的日历，所以问题是如何在仍使用控制台应用程序的情况下如何从我已有的代码中显示全年日历？

Answer 1

你可以做这样的事情。 我试图添加注释以进行解释：

static void Main(string[] args)
{
    // Loop 12 times (once for each month)
    for (int i = 1; i < 13; i++)
    {
        // Get the first day of the current month
        var month = new DateTime(2017, i, 1);

        // Print out the month, year, and the days of the week   
        // headingSpaces is calculated to align the year to the right side            
        var headingSpaces = new string(' ', 16 - month.ToString("MMMM").Length);
        Console.WriteLine($"{month.ToString("MMMM")}{headingSpaces}{month.Year}");
        Console.WriteLine(new string('-', 20));
        Console.WriteLine("Su Mo Tu We Th Fr Sa");

        // Get the number of days we need to leave blank at the 
        // start of the week. 
        var padLeftDays = (int)month.DayOfWeek;
        var currentDay = month;

        // Print out the day portion of each day of the month
        // iterations is the number of times we loop, which is the number
        // of days in the month plus the number of days we pad at the beginning
        var iterations = DateTime.DaysInMonth(month.Year, month.Month) + padLeftDays;
        for (int j = 0; j < iterations; j++)
        {
            // Pad the first week with empty spaces if needed
            if (j < padLeftDays)
            {
                Console.Write("   ");
            }
            else
            {
                // Write the day - pad left adds a space before single digit days
                Console.Write($"{currentDay.Day.ToString().PadLeft(2, ' ')} ");

                // If we've reached the end of a week, start a new line
                if ((j + 1) % 7 == 0)
                {
                    Console.WriteLine();
                }

                // Increment our 'currentDay' to the next day
                currentDay = currentDay.AddDays(1);
            }
        }

        // Put a blank space between months
        Console.WriteLine("\n");
    }

    Console.Write("\nDone!\nPress and key to exit...");
    Console.ReadKey();
}

输出：