How to subtract the date from two datetimepicker?

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Hi,

I'm using VB in visual studio 2008. Anyone know what are the codes to subtracting 2 datetimepickers to determine the number of days in VB? i'm doing a project for and it is essential that i count how many days for a specific task. I need to fill an empty textbox with the no. of days.

Thanks in advance.

Posted 10-Jul-12 17:55pm

Rickysay

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Sergey Alexandrovich Kryukov · Answer 1 · 2012-07-10T18:25:00

Please look more thoroughly at the structure System.DateTime. Is has a subtraction operator defined. So:

C#

System.DateTime first = firstDateTimePicker.Value;
System.DateTime second = secondDateTimePicker.Value;
//best syntax is using operator, not the method call, because it looks unambiguous: 
System.TimeSpan timeSpan = second - time; //not a problem if first is later time, negative time spans are allowed

Please see:
http://msdn.microsoft.com/en-us/library/system.datetime.aspx[^],
http://msdn.microsoft.com/en-us/library/system.windows.forms.datetimepicker.value.aspx[^].

Now, look more thoroughly at the structure System.TimeSpan:
http://msdn.microsoft.com/en-us/library/system.timespan.aspx[^].

It has everything to express the time spam in required units. Pay attention that Total… properties give you the fractional value in any units; other properties calculate integer number of days, hours, etc., whatever you need.

Read MSDN more thoroughly; and you will be all right. :-)

—SA

Rahul K Singh · Answer 2 · 2012-07-10T19:41:00

Solution 2

I think it may help you...

C#

MsgBox(DateDiff(DateInterval.Day, DateTimePicker1.Value, DateTimePicker2.Value))
MsgBox(DateDiff(DateInterval.Month, DateTimePicker1.Value, DateTimePicker2.Value))
MsgBox(DateDiff(DateInterval.Year, DateTimePicker1.Value, DateTimePicker2.Value))

Posted 10-Jul-12 19:41pm

Rahul K Singh

Updated 10-Jul-12 19:55pm

v2