Page_Loaded event seems to be the wrong place to put in code for doing calculations using controls on the page

[Rod]

I've got 2 controls on a page, one for a request date and another for the date of birth of a client.  Both of these values come from a SQL Server database.  During the Page_Loaded event I had been trying to calculate the age of the client on the request date, however that's not working.  For some reason, which I don't understand, the date of birth of the client is wrong (it turns out to be today's date), during the Page_Loaded event.  However, once the page is actually displayed, it is correct.  I had thought Page_Loaded would have been the correct event to put this code, but that doesn't seem to be the case.
 
So, where should I put the age calculation code?  In what event?

The XAML for the first control is:

<telerik:RadMaskedDateTimeInput Name="radReqDate" MinWidth="80" TabIndex="0" FontWeight="Bold"
                               Value="{Binding RequestDate}" InputBehavior="Replace" TextMode="PlainText"
                               SelectionOnFocus="SelectAll" ValueChanged="radReqDate_ValueChanged" />

and the XAML for the second control is here:

<telerik:RadMaskedDateTimeInput Name="radDOB" EmptyContent="Enter DOB" MinWidth="80" TabIndex="14"
                               FontWeight="Bold" InputBehavior="Replace" TextMode="PlainText"
                               Value="{Binding Path=DateOfBirth, Mode=TwoWay}" ValueChanged="radDOB_ValueChanged" />

[Tina Stancheva]

Hi Rod,

From your description I gather that the RadMaskedDateTimeInput values are still not updated in the Loaded event handler of the page. However, as I am not sure how your layout is built, I am not sure what is causing the delay in the value update or if this is the cause for the issue.

This is why I prepared a sample solution to test your scenario and I wasn't able to reproduce the case. Can you please take a look at the project and let me know if I'm missing something? Also, you can use the data objects to calculate the age of the client - basically instead of using the Value property of the MaskedInput controls, you can calculate the age as this:
       var age = radReqDate.Year - radDOB.Year;

All the best,
Tina Stancheva
the Telerik team

[Rod]

Hello Tina,

Thank you for your reply.  I don't have the Telerik controls 2012.2.912.40.  The last I had was 2011 Q2, I believe.  (I can't open your project without errors.)

[Tina Stancheva]

Hi Rod,

I tested my solution with the Q2 2011 assemblies and I am still not able to reproduce the issue. Also, on our side the project can be correctly downloaded and it runs without any issues and this is why I am not sure why you're experiencing issues with it.

Can you try the solution I attached to this post - it uses the Q2 2011 dlls and it still claculates the age correctly. Let me know if I'm missing something.

Regards,
Tina Stancheva
the Telerik team

[Rod]

WOW, you're right.  You're example worked fine.  I'm floored; don't know why your's does and mine doesn't.  (I'm getting an odd error in the VS 2010 designer when I open your project; something about not being able to load the file or assembly 'Telerik.Windows.Controls, Version=2011.2.712.40, but it didn't stop me from running it, and of course I can look through the XAML.)