how to calculate time from time and end time in hour

Question

Hello Sir,

   I have two dropdown list box.

dropdownlist1 is for start time and dropdown list 2 is for end time.

Exa...

  Suppose Dropdown list1 select 8:00 AM and dropdown list2 8:30 AM

I want to calculate time in hour and store in control also store in database

 

This is for timesheet.

Help me.. 

Answer 1

DateTime t1 = Convert.ToDateTime(textBox1.Text); 
DateTime t2 = Convert.ToDateTime(textBox2.Text); 
TimeSpan ts = t1.Subtract(t2);

Answer 2

 TimeSpan duration = new TimeSpan(endtime.Ticks - startTime.Ticks);

Answer 3

string startTime = "7:00 AM"; 
string endTime = "2:00 PM";  
TimeSpan duration = DateTime.Parse(endTime).Subtract(DateTime.Parse(startTime));