Hi Andy,Is your if statement in a loop of some kind? If it is, part of its expression evaluation would have to execute *very* close to the instant when the two times are equal for the expression to evaluate as true. Why not make the comparison >= 0 (greater than or equal to zero) so you are sure to notice exactly when or shortly after the times are equal?
hth Martin----- Original Message ----- From: "Andy B" <a_borka@xxxxxxxxxxxxx>
To: <programmingblind@xxxxxxxxxxxxx> Sent: Thursday, October 25, 2007 12:51 AM Subject: DateTime.Value.CompareTo in c# Anybody know why this code doesnt work? Put inside the Tick event of a timer. The Time.Value is the Value from a DateTimePicker called Time. It is supposed to show a MessageBox when the time/date on the DateTimePicker matches the current system time exactly... Any idea how this is supposed to work? The docs on DateTime.CompareTo(DateTime Date) said that if the result of CompareTo == 0, then the 2 dates match. It seems broke. I ran a test on it: Put a textBox on the form and change the MessageBox line to: textBox1.Text=DateTime.Now.CompareTo(Time.Value).ToString(); Now run the program. Change the DateTimePicker to a date earlier than the system time, and the value -1 shows up in the box (expected). Change the picker to a time later than the system time, and you get 1 in the box (expected). Wait until the system time catches up with the picker... no 0? It just goes from -1 to 1... *confused*... <original code> if (DateTime.Now.CompareTo(Time.Value) == 0) MessageBox.Show("times up"); </original code> <test code> textBox1.Text=DateTime.Now.CompareTo(Time.Value).ToString(); </test code> __________View the list's information and change your settings at http://www.freelists.org/list/programmingblind