Set Custom Control Custom Property on Leave event...

[ChristinaSeay]

Ok... here's my setup:

I have a custom usercontrol for a MaskedTextBox.

I have a Custom Property that I created called ErrorString. This is working fine at run time when the control is used.

What I need to be able to do is update that property on the Leave event of the usercontrol.

So:

Public Sub MaskedTextBox_Leave ..... Handles MaskedTextBox.Leave

V_ErrorString = "My error message"

End Sub

I want the custom property I created: MaskedTextBox.ErrorString = V_ErrorString

But it tells me that ErrorString is not a member of MaskedTextBox... how can I do this??

 

[JuggaloBrotha]

Does your control Inherit the MaskedTextBox or does it contain a MaskedTextBox?

 

[ChristinaSeay]

It inherits the MaskedTextBox.

 

[JuggaloBrotha]

Try handling the Leave event like this:

    Protected Overrides Sub OnLeave(ByVal e As System.EventArgs)
        MyBase.OnLeave(e)
        'Your additional code here
    End Sub

What that does is it overrides the Leave event & makes a call to the Base class' Leave event so it makes it to the control on the form still, but allows you to add additional code as well.

 

[ChristinaSeay]

Cool! That worked... Thank-you!!!!

I also found something else that seems to as well:
<System.ComponentModel.RefreshProperties(System.ComponentModel.RefreshProperties.All)> _
Public Sub MaskedTextBox_Leave..... Handles MaskedTextBox.Leave

Is there any benefit to one of them over the other one?

 

[JuggaloBrotha]

I'm not sure what all System.ComponentModel.RefreshProperties does because I've never used it, but here's what MSDN says about it among other things:

The RefreshPropertiesAttribute class is used for refreshing the design-time view.

But ultimately you want your code to run when the Leave event happens, so overriding it is really what you want.

 

[ChristinaSeay]

That's what I was thinking too... the override method seems much more like the route to go. Thank-You again for your help!!