[筆記] TimeSpanTo###Converter

TimeSpan to double:

   1: value.TotalSeconds

TimeSpan to hh : mm : ss Format:

   1: String.Format(@"{0:hh\:mm\:ss}", value)

TimeSpan (string double) to hh : mm : ss Format:

   1: Int64 totalsec = System.Convert.ToInt64(value);

   2:  

   3: long hour =   (long)totalsec / 3600L;

   4: long minute = (long)Math.Max(0, (totalsec - hour * 3600) / 60);

   5: long second = (long)Math.Max(0, totalsec - hour * 3600 - minute * 60);

   6:  

   7: String strvalue = hour.ToString() + ":" + minute.ToString() + ":" + second.ToString();