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Of course, there was lots of more cool features involved but for the sake of this post I'll keep it simple.The code I chose to implement the above scenario involved the Validating & Validated events: However, all I wanted to do was exit the form in the first place and not spend the extra cycles querying the database or making things happen on the form before closing.Is there anything in WPF I can use to get the same result, an event raised only after the user is It seems that there is no native solution. But when the user click on Enter, he wants the Text Box to validate the change.So here is my suggestion : use the Lost Focus event and the Key Down event when the key is Enter. It creates lots of problem when you have multiple text boxes on one screen and every text box has some logic written in Validate.I didn't want to adjust the forms (legacy app) as I'm using this in a base class, but this seems to resolve this bug.

Like others I'm sure, I tried creating a handler for the form's Closing event and then setting the event's property to false, but it did NOT do the trick. Cancel = Falseyou do this trick for all of the validating control events, then in the Enter Event of the Exit_Button that triggers before the validating event, you set the b Closing Form = true Then it trigger a cascading event and go to the validating event to perform the AND b Form Closing, and will jump to the elsewere you have the e.If the form Protected Overrides Sub Wnd Proc(By Ref m As Message) Dim auto Validate Setting As Auto Validate Dim auto Validate Saved As Boolean = False If m. Super Validator can work with any of these components set or without any of them at all if you are planning to report validation results some other way.Here is simple setup for Super Validator control: C# Dev Components. 2 problems I encounter when using a Command Bar Text Box: first: raising the validating event second: using the Set Error method of the errorprovider to link it to a Command Bar Text Box. Argument not specified for parameter 'e' of 'Private Sub txt PIN_Validating(sender As Object, e As System. But not being able to use the validating event of the Command Bar Text Box, I can't work around that one... The Error Provider requires a control in order to display the desired error.

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Next step is to choose the way Super Validator performs validation.

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