Conversion of local time and GMT (UTC) time

        <summary>
        ///local time to GMT time
        ///</summary> public
        static string togmtstring (DateTime dt)
        {return
            dt. ToUniversalTime (). ToString ("R");
        }

string s = togmtstring (DateTime.Now);

local time: 2011-9-29 15:04:39

The converted time is: Thu, Sep 07:04:39 GMT

        <summary>
        ///local time to GMT format
        ///</summary> public
        static string Togmtformat (DateTime DT )
        {return
            dt. ToString ("R") + dt. ToString ("zzz"). Replace (":", "");
        }

string s = Togmtformat (DateTime.Now);

local time: 2011-9-29 15:04:39

The converted time is: Thu, Sep 15:04:39 gmt+0800

        <summary>///GMT time to local time///</summary>///<param name= "GMT" > String form
        GMT time </param>///<returns></returns> public static DateTime gmt2local (string GMT)
            {DateTime dt = Datetime.minvalue;
                try {string pattern = ""; if (GMT). IndexOf ("+0")!=-1) {GMT = GMT.
                    Replace ("GMT", "");
                Pattern = "DDD, dd MMM yyyy HH ': ' mm ': ' ss zzz"; } if (GMT. ToUpper ().
                IndexOf ("GMT")!=-1 {pattern = "ddd, dd MMM yyyy HH ': ' mm ': ' SS ' GMT '"; } if (Pattern!= "") {dt = DateTime.ParseExact (GMT, pattern, Syst Em.
                    Globalization.CultureInfo.InvariantCulture, System.Globalization.DateTimeStyles.AdjustToUniversal); DT = dt.
                ToLocalTime (); }
                else {dt = Convert.todatetime (GMT);
        } catch {} return dt; }

DateTime dt1 = gmt2local ("Thu, Sep 07:04:39 GMT");

Converted Dt1:2011-9-29 15:04:39

DateTime DT2 = gmt2local ("Thu, Sep 15:04:39 gmt+0800");

Converted DT2:2011-9-29 15:04:39

Author: Zhu Huazhen