C# 时间戳

1.概要

今天给时间设置唯一索引，发现无法设置成功，后来想用时间戳吧，于是做了这个实验。

2.代码

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace CSharp时间戳
{
    class Program
    {
        static void Main(string[] args)
        {
            Console.WriteLine("CSharp时间戳");
            Program p = new Program();
            p.main();
            Console.ReadKey();
        }
        private void main() {
            TimestampChange10 timestampChange10 = new TimestampChange10(new GetTimeSpan());
            string str10 = timestampChange10.GetTimeStamp();
            Console.WriteLine(str10);
            Console.WriteLine(timestampChange10.TimeStampToDateTime(long.Parse(str10)).ToString());

            TimestampChange13 timestampChange13 = new TimestampChange13(new GetTimeSpanUtc());
            string str13 = timestampChange13.GetTimeStamp();
            Console.WriteLine(timestampChange13.GetTimeStamp());
            Console.WriteLine(timestampChange13.TimeStampToDateTime(long.Parse(str13)).ToString());
        }

        /// 

        /// 获取时间差-接口
        /// 
        interface IGetTimeSpan
        {
            TimeSpan getTimeSpan(DateTime dateTime);
        }
        /// 

        /// 时间转换-接口
        /// 
        interface ITimestampChange {
            string GetTimeStamp();
            DateTime TimeStampToDateTime(long timeStamp);
        }
        /// 

        /// 时间转换-抽象
        /// 
        abstract class TimestampChange : ITimestampChange
        {
            protected DateTime dateTime1970 = new DateTime(1970, 1, 1, 0, 0, 0, 0);

            public abstract string GetTimeStamp();
            public abstract DateTime TimeStampToDateTime(long timeStamp);
        }
        /// 

        /// 时间差
        /// 
        class GetTimeSpan : IGetTimeSpan
        {
            public TimeSpan getTimeSpan(DateTime dateTime)
            {
                TimeSpan ts = DateTime.Now - dateTime;
                return ts;
            }
        }
        /// 

        /// 时间差
        /// 
        class GetTimeSpanUtc : IGetTimeSpan
        {
            public TimeSpan getTimeSpan(DateTime dateTime)
            {
                TimeSpan ts = DateTime.UtcNow - dateTime;
                return ts;
            }
        }
        
        /// 

        /// 10位时间戳
        /// 
        class TimestampChange10 : TimestampChange
        {
            readonly IGetTimeSpan getTimeSpan;
            public TimestampChange10(IGetTimeSpan getTimeSpan) {
                this.getTimeSpan = getTimeSpan;
            }
            /// 

            /// 时间转化成时间戳
            /// 
            /// 
            public override string GetTimeStamp()
            {
                return Convert.ToInt64(getTimeSpan.getTimeSpan(dateTime1970).TotalSeconds).ToString();
            }
            /// 

            /// 时间戳转化成时间
            /// 
            /// 
            /// 
            public override DateTime TimeStampToDateTime(long timeStamp)
            {
                return dateTime1970.AddSeconds(timeStamp).ToLocalTime();
            }
        }
        /// 

        /// 13位时间戳
        /// 
        class TimestampChange13 : TimestampChange
        {
            readonly IGetTimeSpan getTimeSpan;
            public TimestampChange13(IGetTimeSpan getTimeSpan)
            {
                this.getTimeSpan = getTimeSpan;
            }
            /// 

            /// 时间转化成时间戳
            /// 
            /// 
            public override string GetTimeStamp()
            {
                return Convert.ToInt64(getTimeSpan.getTimeSpan(dateTime1970).TotalMilliseconds).ToString();
            }
            /// 

            /// 时间戳转化成时间
            /// 
            /// 
            /// 
            public override DateTime TimeStampToDateTime(long timeStamp)
            {
                return dateTime1970.AddMilliseconds(timeStamp).ToLocalTime();
            }
        }
    }
}

3.运行效果

 4.附记

DateTime.Now 没有 DateTime.UtcNow时间准。