The native Blazor designer lets users edit a dashboard in the browser; assigning a report is all it needs to open.

Place the designer.
<StiBlazorDesigner Report="@Report" />
Load a dashboard to edit.
this.Report = StiReport.CreateNewDashboard();
this.Report.Load("Dashboards/DashboardChristmas.mrt");

How it works. The designer edits the same template the viewer renders, so users maintain dashboards directly inside your Blazor app.
На скриншоте ниже Вы можете увидеть результат выполнения данного кода:

Editing a Dashboard in the Designer