"Andreas Selle" <me@privacy.net> wrote in message
news:e9VBYOaxFHA.624@TK2MSFTNGP11.phx.gbl...
> Hi,
>
> right now I am facing the following Problem and cannot find a solution for
> it:
>
> In my Dialog (Form shown with ShowDialog) I have some field validation
> code inside the overridden OnClosing method. Whenever the user tries to
> close the Form (usually by tapping OK) with some invalid input I show a
> nice message and prevent that the Form is closed. Works great.
>
> There is one caveat however: Apart from tapping OK, the Form may also be
> closed by terminating the application through a task manager that sends
> WM_CLOSE to the actual Form Window. As expected, in this case OnClosing
> will be called, too. However, in this case I would prefer to not validate
> the input, but rather ignore any false inputs such that the application
> can be shut down silently and gracefully. This raises the problem how to
> tell whether the Form was closed by tapping OK or whether it was closed
> through some other means.
>
> My first idea was to check the DialogResult property, but this always
> contains DialogResult.None when OnClosing is invoked.
>
> Does anybody have an idea how to solve this problem?
>
> Thanks
>
> Andreas
>
>

> Probably the easiest approach would be to move your validation out of the
> onclosing event and either make it real time (ie some indicator on the
> form to indicate if the information is valid) or place the validation
> inside the event handler for a button. Although the Pocket PC guidelines
> promotes the use of Ok, feedback from customers tends to indicate that
> this is confusing as they are expecting that to be a close button.
>
> Nick
> "Andreas Selle" <me@privacy.net> wrote in message
> news:e9VBYOaxFHA.624@TK2MSFTNGP11.phx.gbl...
>> Hi,
>>
>> right now I am facing the following Problem and cannot find a solution
>> for it:
>>
>> In my Dialog (Form shown with ShowDialog) I have some field validation
>> code inside the overridden OnClosing method. Whenever the user tries to
>> close the Form (usually by tapping OK) with some invalid input I show a
>> nice message and prevent that the Form is closed. Works great.
>>
>> There is one caveat however: Apart from tapping OK, the Form may also be
>> closed by terminating the application through a task manager that sends
>> WM_CLOSE to the actual Form Window. As expected, in this case OnClosing
>> will be called, too. However, in this case I would prefer to not validate
>> the input, but rather ignore any false inputs such that the application
>> can be shut down silently and gracefully. This raises the problem how to
>> tell whether the Form was closed by tapping OK or whether it was closed
>> through some other means.
>>
>> My first idea was to check the DialogResult property, but this always
>> contains DialogResult.None when OnClosing is invoked.
>>
>> Does anybody have an idea how to solve this problem?
>>
>> Thanks
>>
>> Andreas
>>
>>
>
>