Question about inheritance

  • Thread starter Thread starter Tom Rahav
  • Start date Start date
T

Tom Rahav

Hi,

I use VB .NET 2003 and I want to create a new UserControl that will function
as a "smart" combobox that handles few events automatically (such as
auto-complete, etc.) in addition to the regular combobox events.
I created a new class that inherits from: System.Windows.Forms.ComboBox.
I added the some code to the events in the new combobox (in the UserControl
project) and add the control to a win-form in a different project.
The problem is that the enevts I added don't run... When I tried to
understand why, I found that the SmartCombobox control in the win-form
project has its own events (as regular combobox), and what is being run is
the "local" events and not the code I added to the events in the new class.
What should I do in order to run the code in the new control automatically?

Thanks!
Tom.
 
Hi,

I use VB .NET 2003 and I want to create a new UserControl that will function
as a "smart" combobox that handles few events automatically (such as
auto-complete, etc.) in addition to the regular combobox events.
I created a new class that inherits from: System.Windows.Forms.ComboBox.
I added the some code to the events in the new combobox (in the UserControl
project) and add the control to a win-form in a different project.
The problem is that the enevts I added don't run... When I tried to
understand why, I found that the SmartCombobox control in the win-form
project has its own events (as regular combobox), and what is being run is
the "local" events and not the code I added to the events in the new class.
What should I do in order to run the code in the new control automatically?

Thanks!
Tom.
Click to expand...

Don't try and capture the events in your subclass, but override the On...
methods.
For example:
Public Class Form1
Private Sub ComboBox1_Click(ByVal sender As System.Object, ByVal e As
System.EventArgs) Handles ComboBox1.Click
MessageBox.Show("Hi!")
End Sub
End Class

Public Class myCombo
Inherits Windows.Forms.ComboBox

Public Sub myCombo()
End Sub

Protected Overrides Sub OnClick(ByVal e As System.EventArgs)
MessageBox.Show("Ho")
MyBase.OnClick(e)
End Sub

End Class

This will display a message box before calling your client app's click
event.

Cheers,
Jason
 
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