Uno Toolkit Ancestor Binding

Uno Toolkit AncestorBinding — Agent Skill

Workflow

Docs lookup: call uno_platform_docs_search(...) first, then uno_platform_docs_fetch(sourcePath="…") using the sourcePath field from a result (a relative .md path; add the result's anchor for a section). Never pass a URL, a .html link, or a hand-built path.

Step 1: Fetch the AncestorBinding Documentation

uno_platform_docs_search("Uno Toolkit AncestorBinding ItemsControlBinding relative binding DataTemplate ancestor")

Primary documentation page:

• AncestorBinding & ItemsControlBinding: external/uno.toolkit.ui/doc/helpers/ancestor-itemscontrol-binding.md

Fetch the page:

uno_platform_docs_fetch(sourcePath="external/uno.toolkit.ui/doc/helpers/ancestor-itemscontrol-binding.md")

Key Principles (Stable)

• {utu:AncestorBinding AncestorType=MyControl, Path=DataContext.MyProperty} — binds to an ancestor's DataContext
• {utu:ItemsControlBinding Path=DataContext.MyCommand} — shorthand for binding to the parent ItemsControl's DataContext
• Similar to WPF's {RelativeSource Mode=FindAncestor, AncestorType=...}
• Essential for commands in DataTemplates that need to call the page's ViewModel
• XAML namespace: xmlns:utu="using:Uno.Toolkit.UI"

Related Skills

• [[uno-toolkit-command-extensions]] — Commands in templates