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Validation

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Hi James,

You can use the UserAddingRow to check if both values are selected (assuming that all already added rows have valid values):
Private Sub RadGridView1_UserAddingRow(ByVal sender As Object, ByVal e As GridViewRowCancelEventArgs)
    Dim row = TryCast(e.Rows(0), GridViewNewRowInfo)
    If row.Cells("Employee").Value IsNot Nothing AndAlso row.Cells("PayCode").Value IsNot Nothing Then
        Return
    End If
    e.Cancel = True
    MessageBox.Show("All values must be filled")
End Sub

If the above code is used and only one value is selected the user can press Esc to remove the focus from the new row and go to the already added rows. In this case, it does not matter which key you are using to add the new row.
 
I hope this will be useful. 

Regards,
Dimitar
Telerik by Progress
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