Auto-Select First Item Using XAML for Selector-Derived Controls (ListBox, ListView, TabControl, etc)

CodeRelief.net

Problem

When your application has a control on it that derives from Selector and has no items on load nothing is selected. During run-time when the user is clicking around and adds items to the Selector-derived control, you would assume that the control would automatically select the first item because that only makes sense. However, your assumption and mine would be wrong; this is not the behavior at all. Instead the selector will still have no items selected. This means in order to get this “auto-select first item” behavior, you have to do it yourself. Luckily its an easy fix as shown below.

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