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GetBindingExpression always returns null

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GridView
This is a migrated thread and some comments may be shown as answers.
Patrick
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Patrick asked on 13 Sep 2012, 05:44 PM
I have a column

       <telerik:GridViewDataColumn

                    UniqueName="CarrierCommission"

                                  DataFormatString="c"

                                  IsVisible="{Binding Path=SearchCriteria, Converter={StaticResource CarrierColumnConverter}}"

                                  Header="{StaticResource CarrierCommission}"

                                  DataMemberBinding="{Binding Path=CarrierRepCommission}"

                                  Width="{StaticResource CommissionColumnWidth}">

        </telerik:GridViewDataColumn>

I would like to programmatically refresh the IsVisible property by calling UpdateTarget on the IsVisible binding expression.  However, it seems that no matter when I call

 

Dim exp As BindingExpression = column.GetBindingExpression(Telerik.Windows.Controls.GridViewDataColumn.IsVisibleProperty)


I always get null for the value of exp.  When is it safe to call GetBindingExpression or is there another way to refresh the binding.

Thanks,

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