This comboBox has a long list of values in it, so I want users to be able to type in what theyre thinking so it will match their text with comboBox values.
Using IsTextSearchable on its own doesn't do anything - adding IsEditable allows it to be searched like I want, but allows the user to enter their own value into the text area, which my form cannot accept.
<ComboBox x:Name="deptCombo" IsEditable="True" IsTextSearchEnabled="True" />
How can I allow users to search the comboBox but remove whatever they entered into the box if its not one of the preexisting items, once they click out of the box (onto another box or the "Enter" button, whatever)?