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[WPF] How to use RelativeSource binding in WPF

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Posted on 4/22/2020 1:37:09 PM | | |
When specifying a binding source in WPF, one way to do this is to use RelativeSource.

This means that the current element and the binding source are positional.

The first relationship: Self

To give the simplest example: in a StackPanel, there is a TextBlock.

If you want the width and height of the textbox to be the same, you can do this by setting the attribute Height="{Binding RelativeSource={RelativeSource Self},Path=Width}".


The second relation: TemplatedParent

For example, write a style for a Button and modify the Button to be an elliptical type. At the same time, the background color of the ellipse must be the same as that of the button.

In this example, TemplateParent refers to the Button


The third relationship: AncestorType

Specifies that the binding source is a parent element


In this example, the background color of the Label is the same as the background color of the Grid.





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