Embed the report designer in Server, load a template, and connect its editing and save actions.

Designer setup. Configure the designer, load the report template, process its callbacks, and connect the save action to the application.
<StiBlazorDesigner Report="@Report" OnSaveReport="@OnSaveReport" />

@code {
    private StiReport Report;

    protected override void OnInitialized()
    {
        this.Report = new StiReport();
        this.Report.Load("Reports/TwoSimpleLists.mrt");
    }

    private void OnSaveReport(StiSaveReportEventArgs args)
    {
        args.Report.Save("Reports/TwoSimpleLists.mrt");
    }
}
The OnSaveReport callback receives the edited report through args.Report; here it is saved back to a file, but you can store it in a database or any other location.
In the screenshot below you can see the result of the sample code:

Editing a Report Template in the Designer

Hi. Need any help?