C#时间格式转换为时间戳(互转)

using UnityEngine;
using System.Collections;
using System;

/// 
/// C#时间格式转换为时间戳(互转)
/// 时间戳定义为从格林威治时间 1970年01月01日00时00分00秒(北京时间1970年01月01日08时00分00秒)起至现在的总秒数。 
/// 
public class DateTime_TimeStamp : MonoBehaviour
{
    protected int m_timestamp;

    /// 
    /// 获取时间戳Timestamp  
    /// 
    /// 
    /// 
    private int GetTimeStamp(DateTime dt)
    {
        DateTime dateStart = new DateTime(1970, 1, 1, 8, 0, 0);
        int timeStamp = Convert.ToInt32((dt - dateStart).TotalSeconds);
        return timeStamp;
    }

    /// 
    /// 时间戳Timestamp转换成日期
    /// 
    /// 
    /// 
    private DateTime GetDateTime(int timeStamp)
    {
        DateTime dtStart = TimeZone.CurrentTimeZone.ToLocalTime(new DateTime(1970, 1, 1));
        long lTime = ((long)timeStamp * 10000000);
        TimeSpan toNow = new TimeSpan(lTime);
        DateTime targetDt = dtStart.Add(toNow);
        return targetDt;
    }

    /// 
    /// 时间戳Timestamp转换成日期
    /// 
    /// 
    /// 
    private DateTime GetDateTime(string timeStamp)
    {
        DateTime dtStart = TimeZone.CurrentTimeZone.ToLocalTime(new DateTime(1970, 1, 1));
        long lTime = long.Parse(timeStamp + "0000000");
        TimeSpan toNow = new TimeSpan(lTime);
        DateTime targetDt = dtStart.Add(toNow);
        return dtStart.Add(toNow);
    }

    void OnGUI()
    {
        if (GUILayout.Button("获取当前时间的时间戳"))
        {
            DateTime dtNow = DateTime.Now;
            m_timestamp = GetTimeStamp(dtNow);
            Debug.Log(string.Format("获取当前时间的时间戳 = {0} -> {1}", dtNow.ToString("yyyy-MM-dd hh:mm:ss"), m_timestamp));
        }

        if (GUILayout.Button("将时间戳转换成日期_1"))
        {
            DateTime dt = GetDateTime(m_timestamp);
            Debug.Log(string.Format("将时间戳转换成日期_1 = {0} -> {1}", m_timestamp, dt.ToString("yyyy-MM-dd hh:mm:ss")));
        }

        if (GUILayout.Button("将时间戳转换成日期_2"))
        {
            DateTime dt = GetDateTime(m_timestamp.ToString());
            Debug.Log(string.Format("将时间戳转换成日期_2 = {0} -> {1}", m_timestamp, dt.ToString("yyyy-MM-dd hh:mm:ss")));
        }
    }
}

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