WPF Notes (1.3 attribute elements)--hello,wpf!

The concept of "attribute elements" in this section can be described in a bizarre sense.

1. WPF implements object modeling with tag elements, two types: Control and container, which are used to load content and behavior, such as Button, the latter such as window.

You can write this:

<Window >
　 <Button Width="100" Height="100">
　　　 <Image Source="tom.png" />
　 </Button>
</Window>

You can also do this:

<Window >
　 <Button Width="100" Height="100">
　　　 <TextBox Width="75">edit me</TextBox>
　 </Button>
</Window>

That is, the image property of the original button and the TextBox property are extracted as objects. This is because the button originated from a class: ContentControl, which knows how to generate all the controls it mounts.

2. In fact, the complete writing is this:

<Button Width="100" Height="100">
　 <Button.Content>
　　　 <Image Source="tom.png" />
　 </Button.Content>
</Button>

However, there can be no two controls within the,<button.content> label, which will display syntax errors, and can only be an attribute element-this time with a panel.

The window control has the same usage as the button, as shown in the following section.