Developing Applications for WP7 : Data Binding (part 2)
Data binding also allows you to create bindings that allow you to create a linkage between XAML elements. This is called Element Binding. To use element binding, you can specify the ElementName as part of the binding syntax.
The size of the font in the TextBox is being set based on the value of the Slider (named fontSizeSlider). In this way you can use elements in the XAML to supply data to other elements in the XAML. A more conventional use of element binding is to set the data context of a container based on the selected value of a control.
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