Binding instance as resource

Question

I have a very long and repeating binding expression in xaml. Can I first define it in resource section and then refer to it using DynamicResource or StaticResource? Something like:

<SomeControl Visibility="{DynamicResource BindingToParentDataContext}">

The binding expression looks like:

{Binding Path=DataContext.SomeProperty, RelativeSource={RelativeSource FindAncestor, AncestorType={x:Type local:SomeParentUserControl}}, Mode=OneWay, Converter={StaticResource booleanToVisibilityConverter}}

Promise

How about answers from similar question? – Sherikasherill

Thank you for the useful link. But I am not sure if this will help me. I added to the original question what my binding expression look like. – Promise

Like in the mentioned question, you can create custom binding that sets RelativeSource, Mode and Conveter in constructor. It` pretty straightforward. – Sherikasherill

Ok, thank you very much. I have another question. The RelativeSource class constructor requires ancestorLevel argument. How do I specify to search for all levels like it happens in xaml? – Promise

It looks like AncestorLevel is defaulted to -1, but you can`t set it with value less than 1 yourself. So just use another constructor and set AncestorType directly after creating RelaticeSource. – Sherikasherill

Answer 1

What might work is to write a custom markup extension. This should be a good reference.

But besides that, you can't "predefine" markups like that. Depending on your scenario, you might can put some of these into a datatemplate, which you can reuse.

Reminiscence

Answer 2

You cannot declare a Binding in a resource dictionary, i doubt that this can be made to work using resources.

Righteousness

yes, it can work... like this : https://mcmap.net/q/565129/-binding-as-a-resource – Crucial