Webix Dashboard

Can somebody guide me with sample codes for implementing webix dashboard and integrating it with angular with REST APIs from ASP.NET Core for the data to be displayed?

Hello @Varun,
Unfortunately, we have no unified example for all the mentioned features, but the following resources may be useful:

The demo of integration for Angular 7: GitHub - webix-hub/angular2-demo: Demo of Webix usage with Angular 2
The described methods are applicable to all Webix views, including the dashboard widget.
Here’s also an example for .Net Core: GitHub - webix-hub/net-core-demos: Webix widgets with .Net Core backend

Regarding the backend of the app: as a client-side UI library, Webix does not depend on the backend technology. There are no specific requirements except for the request/response formats (which are always the same by default). RESTful API is supported as well.
For the description of the most common features please check the related chapter of the documentation. By default, Webix expects data as JSON. The example of an expected server-side response in case of data saving you can find here.