Validation & Tab Control

I have a custom control in which I want to perform some data validation in the OnValidating event. If the data is invalid, the control sets the CancelEventArgs's Cancel property to true to reset the focus back to the control.

This all works fine until I host this control on a tab page. If the user enters invalid data into the control then directly clicks on another tab, the validating event gets fired several times in succession, and the tab page changes anyway.

Is there a way to prevent the tab page from being changed in this secnario

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Validation & Tab Control

nsimeonov
Can you post your code for your OnValidating handler   I created a simple example and it worked just fine:

Public Class MyTextbox
    Inherits TextBox

    Protected Overrides Sub OnValidating(ByVal e As System.ComponentModel.CancelEventArgs)
        e.Cancel = True
        MyBase.OnValidating(e)
    End Sub
End Class
Miles Cohen
You could reset the TabPage in the TabControls SelectedIndexChanged event.

vb example..

Private Sub TabControl1_SelectedIndexChanged(...)...
    If somebooleanvariable = False Then
        TabControl1.SelectedTab = TabPage1
    End If
End Sub
Validation & Tab Control

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