Calculating how many minutes there are between two times

Question

I have a datagridview in my application which holds start and finish times. I want to calculate the number of minutes between these two times. So far I have got:

var varFinish = tsTable.Rows[intCellRow]["Finish Time"]; TimeSpan varTime = (DateTime)varFinish - (DateTime)varValue; int intMinutes = TimeSpan.FromMinutes(varTime); 

But the last line won't compile because it says I am using invalid arguments for the Timespan constructor. I've researched quite a bit about how to calculate the number of minutes between two times, but I'm hitting a bit of a brick wall. Can someone please advise me on the best way to achieve my objective.

EDIT/

Now my code is as follows:

var varFinish = tsTable.Rows[intCellRow]["Finish Time"]; TimeSpan varTime = (DateTime)varFinish - (DateTime)varValue; int intMinutes = (int)varTime.TotalMinutes; 

But I am getting an invalid cast on the second line. Both varFinish and varValue are times e.g. 10:00 and 8:00 say. So not sure why they won't cast to type DateTime?

Answer 1

Try this

DateTime startTime = varValue DateTime endTime = varTime  TimeSpan span = endTime.Subtract ( startTime ); Console.WriteLine( "Time Difference (minutes): " + span.TotalMinutes ); 

Edit: If are you trying 'span.Minutes', this will return only the minutes of timespan [0~59], to return sum of all minutes from this interval, just use 'span.TotalMinutes'.