After 8 months, we are thrilled to announce the release of DotVVM 4.1. The release contains the new DotVVM Auto UI library, numerous improvements and bug fixes, and a bunch of improvements of Composite controls which allowed us to create a brand new implementation of Bootstrap for DotVVM for Bootstrap 5.

DotVVM was always focused on improving productivity for .NET developers who build web applications.

Building forms is really easy! To put all selected options into a collection, just bind the collection to multiple CheckBox controls.

One of the scenarios in which the new way of building controls in DotVVM – the composite controls – really excel, is when used in combination with Web components.

Building forms is really easy! Use the Visible property to show or hide forms fields based on values in other fields.

Building forms is really easy! Bind a collection of objects in the ComboBox control and let the user select the value.

DotVVM syntax is different from Razor. The Validator control can display validation errors for a particular property. You can choose to apply CSS classes on any element based on validation state of some property.

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

DotVVM syntax is different from Razor. Instead of concatenating fragments of CSS classes, just use class-* property and specify a boolean expression indicating whether the class shall be included or not.

DotVVM syntax is different from Razor. Instead of concatenating parts of URLs, the RouteLink component can build links to other pages from the route name and its parameters.