Report variables receive values from the Blazor UI; assign them by name on a copy of the report, then re-render.

Set a variable and re-render.
var report = Report.Clone() as StiReport;

report["MySuperUselessVariable"] = NewValueInput;
report.Render();

Report = report;

How it works. The value entered in the input box is bound into the report before rendering, so the viewer immediately shows the updated result.
In the screenshot below you can see the result of the sample code:

Using Report Variables in Code

Hi. Need any help?