datetime problem in C#

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i'm working in WPF in C#. i have two datepicker. and i want first datepicker days subtract 2nd datepicker. And first datepicker days is less for 2nd datepicker so message box show error. So what can i do.

Posted 24-Apr-12 6:53am

Arsalaan Ahmed

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Sergey Alexandrovich Kryukov 24-Apr-12 13:30pm

Is your copy of MSDN broken? How about Google or Bing? Did they ban you? Sorry for you... :-)
--SA

S@53K^S 24-Apr-12 15:00pm

Hilarious :-)

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Clifford Nelson · Answer 1 · 2012-04-24T07:55:00

Solution 2

You mention a message box. I would recommend displaying an error message, or some similar why of showing there is an error (red broder on textboxes with errors and a tool tip). At the same time disable the user from pressing the OK button. Users are not real fond of message boxes. Some designers do everything they can to avoid message boxes.

Posted 24-Apr-12 7:55am

Clifford Nelson

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Sergey Alexandrovich Kryukov 25-Apr-12 16:43pm

That is a good point; even though it hardly related to the question, my 5.
--SA

Sergey Alexandrovich Kryukov · Answer 2 · 2012-04-24T07:29:00

I don't know what exactly date picker do you have, but they all should have something like Value property of the type System.DateTime,
http://msdn.microsoft.com/en-us/library/system.datetime.aspx[^].

And this type has subtraction operation defined. So, if you have two times, the difference can be found like this:

C#

System.DateTime t1 = //...
System.DateTime t2 = //...
System.TimeSpan = t2 - t1; //as simple as that; t1 - t2 is also valid

Finally, look at System.TimeSpan structure to see what is that:
http://msdn.microsoft.com/en-us/library/system.datetime.aspx[^].

—SA