DotVVM Tip 05: Access parent context using _parent or _root

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))">
    x
</button>

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

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.