Question

I am working in Firefox’s places.sqlite file and need to convert the local DateTime to PRTime, using C#. PRTime is "a 64-bit integer representing the number of microseconds since midnight (00:00:00) 1 January 1970 Coordinated Universal Time (UTC)) to a datetime."

Answer 1

This can be achieved with this little helper class here:

    public static class TimeHelper
    {
        // PRTime is Int64 count of microseconds from 1970-01-01-00-00-0000
        static Int64 ToPRTime(DateTime dateTime)
        {
            TimeSpan t = (dateTime - new DateTime(1970, 1, 1));
            return Convert.ToInt64(t.TotalMilliseconds * 1000);
        }

        static DateTime FromPrTime(Int64 prTime)
        {
            var someDate = new System.DateTime(1970, 1, 1, 0, 0, 0, 0);
            var milliSeconds = prTime / 1000;
           return someDate.AddMilliseconds(milliSeconds);
        }
    }