The Web Dashboard acts as a Dashboard Viewer without the capability to switch to the Designer mode on the client side. In this mode, the Web Dashboard does not load the extensions required for designing dashboards.
You can use the DashboardExtensionSettings.WorkingMode property to specify the initial working mode on a server.
Use the following two approaches to switch the working mode on the client side:
You can allow end users to switch between the Designer and Viewer by enabling the Dashboard Panel.
To see an example on how to switch between the WorkingMode.Designer and WorkingMode.Viewer mode, refer to the following topic: How to: Create an ASP.NET MVC Dashboard Designer Application with Predefined Data Sources.