Your application can host the dashboard designer so users edit dashboards themselves.

Open the designer. Load a dashboard template and call Design():
var report = new StiReport();
report.Load("Dashboards\\DashboardChristmas.mrt");
report.Design();

How it works. The designer edits the same template the viewer renders, so changes made by the user are saved straight back to the dashboard.
На скриншоте ниже Вы можете увидеть результат выполнения данного кода:

Editing a Dashboard in the Designer