Universal Windows® Apps with XAML and C# Unleashed

Introducing Binding

The key to data binding is a Binding markup extension that “glues” two properties together and keeps a channel of communication open between them. You can set up a Binding once and then have it do all the synchronization work for the remainder of the app’s lifetime.

Imagine that you have a TextBlock with text that you want to automatically update as the user types in a TextBox, such as the following:

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<StackPanel Orientation="Horizontal">   <!-- The user should type a username here -->   <TextBox Name="textBox"            TextChanged="TextBox_TextChanged"/>   <!-- This displays, "Hi, username!" -->   <TextBlock>     <Run>Hi, </Run>     <Run x:Name="run"/>     <Run>!</Run>   </TextBlock> </StackPanel ...