如何:使用 ThicknessConverter 对象
示例
本示例演示如何创建 ThicknessConverter 的实例,并用它来更改边框的粗细。
此示例定义了一个称为 changeThickness 的自定义方法,此方法首先将单独 Extensible Application Markup Language (XAML) 文件中定义的 ListBoxItem 的内容转换为 Thickness 的实例,然后再将该内容转换为 String。 此方法将 ListBoxItem 传递给 ThicknessConverter 对象,该对象将 ListBoxItem 的 Content 转换为 Thickness 的实例。 此值然后作为 Border 的 BorderThickness 属性值进行回传。
此示例不运行。
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
private void changeThickness(object sender, SelectionChangedEventArgs args)
{
ListBoxItem li = ((sender as ListBox).SelectedItem as ListBoxItem);
ThicknessConverter myThicknessConverter = new ThicknessConverter();
Thickness th1 = (Thickness)myThicknessConverter.ConvertFromString(li.Content.ToString());
border1.BorderThickness = th1;
bThickness.Text = "Border.BorderThickness =" + li.Content.ToString();
}