Combo box of time to the next 30 minutes like Outlook

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Hi all,

How to make a combobox showing the current index or current value or current text to the next 30 minutes just like outlook selecting time for new meeting? I have a fix combobox collection starting 12:00 AM, 12:30 AM, 1:00 AM to 11:30 PM like full day time.

Where combo box "Start Time" by default is nearest next 30 minutes.

- If the PC time is 9:35 AM, it will automatically select to 10:00 AM.
- If the PC time is 10:00AM, it will automatically select to 10:30 AM.

As picture from below link
http://www.ljmu.ac.uk/ITHelp/ITHelp_Images/OutlookNewAppointment.png[^]

Edited
** I need a link to code this on combobox

TQ

Posted 10-Aug-14 17:59pm

Luiey Ichigo

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Trung Nguyen Son 11-Aug-14 1:58am

Have you tried my solution, yet?

Luiey Ichigo 13-Aug-14 21:45pm

yeah man..awesome!

2 solutions

Solution 1

this might help you..

DateTime.AddMinutes[^]

Posted 10-Aug-14 18:06pm

kedar001

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Luiey Ichigo 11-Aug-14 0:22am

I can't see the idea :(

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Trung Nguyen Son · Accepted Answer · 2014-08-10T19:04:00

C#

// It's a function for rounding up or down by a minute interval
public static DateTime Round(DateTime dt, int dir, int interval)
{
	// dir 1 = up, dir 0 = down
	DateTime t;
	if (dir == 1)
		t = dt.AddMinutes((60 - dt.Minute) % interval);
	else
		t = dt.AddMinutes(-dt.Minute % interval);
	return t;
}

For the StartTime, you will use:

C#

DateTime startTime = Round(Now, 1, 30);

For the second combobox, you will use:

C#

DateTime nextTime = startTime.AddMinutes(30);