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
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)
//((i).PadLeft(2, '0'));
}
}
Console.ReadKey();
}
}
}