c# - - - 将数字转为2位数，单个数字转为两位字符串，将数字转为00,01,02...09,10,11,12

Code

using System;

namespace TestDemo01
{
    class Program
    {
        static void Main(string[] args)
        {
            Console.WriteLine("Hello World!");

            int mIntStart_time = Convert.ToInt32("00");
            int mIntEnd_time = Convert.ToInt32("23");

            DateTime startTime = Convert.ToDateTime("2022/06/01");
            DateTime endTime = Convert.ToDateTime("2022/06/01");
            for (DateTime time = startTime; time <= endTime; time = time.AddDays(1))
            {
                for (int i = mIntStart_time; i <= mIntEnd_time; i++)
                {
                    // 方法一
                    Console.WriteLine(i.ToString("D2"));

                    // 方法二 在给定字符串的左侧补充指定字符('0')到我们指定的长度(2)
                    //Console.WriteLine(Convert.ToString(i).PadLeft(2, '0'));
                }
            }
            Console.ReadKey();
        }
    }
}

效果

Other

参考

C# 日记-PadLeft、PadRight用法：https://blog.csdn.net/Dragon_Raja/article/details/120050269 C# 字符串格式化_C# 字符串格式化整理：https://blog.csdn.net/u011127019/article/details/110286501