How to: Use a ThicknessConverter Object

This example shows how to create an instance of ThicknessConverter and use it to change the thickness of a border.

The example defines a custom method called changeThickness; this method first converts the contents of a ListBoxItem, as defined in a separate Extensible Application Markup Language (XAML) file, to an instance of Thickness, and later converts the content into a String. This method passes the ListBoxItem to a ThicknessConverter object, which converts the Content of a ListBoxItem to an instance of Thickness. This value is then passed back as the value of the BorderThickness property of the Border.

This example does not run.

Private Sub changeThickness(ByVal sender As Object, ByVal args As SelectionChangedEventArgs)

    Dim li As ListBoxItem = CType(CType(sender, ListBox).SelectedItem, ListBoxItem)
    Dim myThicknessConverter As System.Windows.ThicknessConverter = New System.Windows.ThicknessConverter()
    Dim th1 As Thickness = CType(myThicknessConverter.ConvertFromString(li.Content.ToString()), Thickness)
    border1.BorderThickness = th1
    bThickness.Text = "Border.BorderThickness =" + li.Content.ToString()
End Sub
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