This example builds a Realtime Live Report with automatic content update. For example, use a report with some text and a chart with two series. In the Form1() initialization method, find the necessary report components. The report is loaded from the application resources:
private StiText text = null;
private StiChart chart = null;

public Form1()
{
	//
	// Required for Windows Form Designer support
	//
	InitializeComponent();
	
	stiReport1.Render();
	StiComponentsCollection comps = stiReport1.RenderedPages[0].GetComponents();
	text = comps["Text1"] as StiText;
	chart = comps["Chart1"] as StiChart;
}

The timer1_Tick timer event change the properties of the selected report components (such as angle), and redraws the report. First, apply the text rotation:
private System.Windows.Forms.Timer timer1;

private void timer1_Tick(object sender, System.EventArgs e)
{
	if (text == null)return;
	
	// Rotate text
	float angle = text.TextOptions.Angle;
	angle -= 1f;
	if (angle < 0) angle = 359;
	text.TextOptions.Angle = angle;

...

Next, since the chart sample has two series, the rotation should be done for each series:
...

	// Rotate series 1
	angle = ((StiDoughnutSeries)chart.Series[0]).StartAngle;
	angle -= 1f;
	if (angle < 0) angle = 359;
	((StiDoughnutSeries)chart.Series[0]).StartAngle = angle;
	
	// Rotate series 2
	angle = ((StiDoughnutSeries)chart.Series[1]).StartAngle;
	angle += 1f;
	if (angle > 359) angle = 0;
	((StiDoughnutSeries)chart.Series[1]).StartAngle = angle;

...

Finally, update the report in realtime:
...

	RectangleD rect = stiPreviewControl1.GetComponentRect(text);
	stiPreviewControl1.InvalidatePageRect(rect.ToRectangle());
	
	rect = stiPreviewControl1.GetComponentRect(chart);
	stiPreviewControl1.InvalidatePageRect(rect.ToRectangle());
	//stiPreviewControl1.View.Invalidate();
}

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

Realtime Report Preview with Autoupdate