DateTimeHelper.cs

出自ProgWiki

用途

• PHP的Date("U")所產生的日期值與ASP.NET的DateTime的日期格式互轉

• 參照: 日期格式PHP Date("U") 轉換成ASP.NET 常用之日期格式?

程式碼

using System;
 
public class DateTimeHelper
{
    static double CurrentTimeZoneUtcOffset = 99;
 
    static DateTime Timestamp2DateTime(double timestamp)
    {
        if (CurrentTimeZoneUtcOffset == 99)
            CurrentTimeZoneUtcOffset = TimeZone.CurrentTimeZone.GetUtcOffset(DateTime.Now).TotalHours;
 
        DateTime dt = (new DateTime(1970, 1, 1)).AddHours(offset).AddSeconds(timestamp);
 
        return dt;
    }
 
    static double DateTime2Timestamp(DateTime dt)
    {
        if (CurrentTimeZoneUtcOffset == 99)
            CurrentTimeZoneUtcOffset = TimeZone.CurrentTimeZone.GetUtcOffset(DateTime.Now).TotalHours;
 
        double timestamp = (dt.AddHours(-CurrentTimeZoneUtcOffset) - new DateTime(1970, 1, 1)).TotalSeconds;
 
        return timestamp;
    }
}