This example shows how to register JSON data from code:
<script type="text/javascript">
	// Set full screen mode for the viewer
	var options = new Stimulsoft.Viewer.StiViewerOptions();
	options.appearance.scrollbarsMode = true;
	options.appearance.fullScreenMode = true;
	
	// Create the dashboard viewer with specified options
	var viewer = new Stimulsoft.Viewer.StiViewer(options, "StiViewer", false);
	var report = Stimulsoft.Report.StiReport.createNewDashboard();
	
	// Load dashboard from url
	report.loadFile("../dashboard/Dashboard.mrt");
	
	// Create new DataSet object
	var dataSet = new Stimulsoft.System.Data.DataSet("Demo");
	
	// Load JSON data file from specified URL to the DataSet object
	dataSet.readJsonFile("../dashboard/Demo.json");
	
	// Remove all connections from the dashboard template
	report.dictionary.databases.clear();
	
	// Register DataSet object
	report.regData("Demo", "Demo", dataSet);
	
	// Show dashboard in the Viewer
	viewer.report = report;
</script>

In the screenshot below you can see the result of the sample code:

Register Data for Dashboard Template