DotVVM Tip 05: Access parent context using _parent or _root

Published: 11/14/2022 1:11:00 PM

DotVVM Tips is a series of short articles showing interesting features of DotVVM. To learn more, visit our Docs site.

DotVVM syntax is different from Razor. Instead of passing lambda expressions, use _root, _parent or _this expressions to reference different scopes in your viewmodel.

// Razor
<button type="button" 
        @onclick="@(() => RemoveTopping(topping))">

// DotVVM
<dot:Button Click="{command: _root.RemoveTopping(_this)}">

If you need to jump two scopes up, you can use _parent2. You can also create a child scope by setting the DataContext property to some expression. All bindings inside the blocks will be evaluated within the specified binding context.

Tomáš Herceg

I am the CEO of RIGANTI, a small software development company located in Prague, Czech Republic.

I am Microsoft Most Valuable Professional and the founder of DotVVM project.