How to split the time

//Consider you already have the output ins tring
              string strOutput = "19:15:00";

              //Convert it to DateTime
              DateTime output = Convert.ToDateTime(strOutput);

              //Now you can manipulate and format the DateTime
              Console.WriteLine(String.Format("{0:HH:mm}", output));  //  19:15
              Console.WriteLine(String.Format("{0:hh:mm}", output));  //  07:15

              //You can do the folowings as well
              Console.WriteLine(output.TimeOfDay);                //  {19:15:00}
              Console.WriteLine(output.ToShortTimeString());  //  "7:15 PM"
              Console.WriteLine(output.ToLongTimeString());   //  "7:15:00 PM"

String.Format("{0:HH:mm}", output)

string time = "19:15:00";
DateTime output = Convert.ToDateTime(time);
string desiredText = String.Format("{0:HH:mm}", output);

string time = "19:15:00";
      time= time.Substring(0, time.LastIndexOf(':'));
 // or 
     time =  DateTime.ParseExact(time, "HH:mm:ss", System.Globalization.CultureInfo.CurrentCulture).ToString("HH:mm");

string s = value.Tables[0].Rows[0]["TripTime"].ToString();
this.TripTime.InnerText = s.Substring(0, s.Length - 2);