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Old December 4th, 2005, 06:06 PM
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Default Web Custom Control Events

I created a web custom control which is derived from TextBox. I need to use the event OnTextChanged, but could not make it work. Similar code works for Button control.

To reproduce the problem, add the two custom controls to a webform. Add a break point sin the OnClick and OnTextChanged events and run the application.

I do not know what make the difference, and how to make the derived TextBox working.

Thank you very much for your help.


Code for the derived textbox:

Imports System.ComponentModel
Imports System.Web.UI
Imports System.Web.UI.WebControls

Public Class PBTextBox
    Inherits System.Web.UI.WebControls.TextBox

    Public Sub New()
        Me.Width = System.Web.UI.WebControls.Unit.Pixel(60)
    End Sub

    Protected Overrides Sub OnTextChanged(ByVal e As EventArgs)
    End Sub

End Class

Code for the derived Button

Imports System.ComponentModel
Imports System.Web.UI
Imports System.Web.UI.WebControls

' custom control derives from button
Public Class CountedButton
    Inherits System.Web.UI.WebControls.Button

    ' constructor initializes view state value
    Public Sub New()
    End Sub

    ' override the OnClick to increment the count,
    ' update the button text and then invoke the base method
    Protected Overrides Sub OnClick(ByVal e As EventArgs)
        'ViewState("Count") = CInt(ViewState("Count")) + 1
    End Sub
End Class

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Old May 3rd, 2007, 01:19 AM
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   I am also facing this problem. But now i will solve that problem. You must set the property


After that it raising all the events.




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