C# 本地时间格式，UTC时间格式，GMT时间格式处理

痛定思痛。 2022-05-23 23:47 1042阅读 0赞

一、本地时间显示

DateTime now = DateTime.Now;
    //本地时间格式
    Console.WriteLine(now.ToLongDateString());
    Console.WriteLine(now.ToLongTimeString());
    Console.WriteLine(now.ToLocalTime());

二、UTC时间格式

//Utc时间格式
    
    DateTimeOffset dtOff = DateTimeOffset.UtcNow;
    Console.WriteLine(dtOff.ToLocalTime()); //2018/5/16 17:55:18 +08:00

//将UTC时间转化为本地时间
                //1.从DateTimeOffset转换
                DateTimeOffset dtoff = DateTimeOffset.UtcNow;
                dtoff.ToLocalTime();
    
                //2.从DateTimeOffset?转换
                DateTimeOffset? dtoffnull = DateTimeOffset.UtcNow;
                string str=dtoffnull.ToString();
                if (str != "")
                {
                    TimeZone.CurrentTimeZone.ToLocalTime(Convert.ToDateTime(dtoffnull));
                }
    
    
                //3.从DateTime转换
                DateTime.UtcNow.ToLocalTime();

三、GMT时间格式

//GMT时间格式
    string gmtStr = DateTime.UtcNow.ToString("r");//Wed, 16 May 2018 15:44:50 GMT
    Console.WriteLine(gmtStr);
    Console.WriteLine(DateTime.Now.ToString("r")); //Wed, 16 May 2018 15:44:50 GMT

将GMTstring 转换成DateTime

public static bool GMTStrParse(string gmtStr,out DateTime gmtTime) {  
        CultureInfo enUS = new CultureInfo("en-US");  
        bool s = DateTime.TryParseExact(gmtStr, "r", enUS, DateTimeStyles.None, out gmtTime);  
        return s;  
    }

#### [C\#计算两个时间年份月份差][C] ####

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[C]: https://blog.csdn.net/u011127019/article/details/79142612
[C_]: https://blog.csdn.net/u011127019/article/details/76606110
[C_ dynamic]: https://blog.csdn.net/u011127019/article/details/76092382