This sample project shows the possibility of creating a report in runtime. After you create a report using the code, you can display it in the WPF viewer. For a start, initialize components and load data for the future report:
private System.Data.DataSet dataSet1 = new System.Data.DataSet();

public Window1()
{
	StiOptions.Wpf.CurrentTheme = StiOptions.Wpf.Themes.Office2013Theme;
	Stimulsoft.Report.Wpf.StiThemesHelper.LoadTheme(this);
	InitializeComponent();
	
	dataSet1.ReadXmlSchema("..\\..\\Data\\Demo.xsd");
	dataSet1.ReadXml("..\\..\\Data\\Demo.xml");
	
	dataSet1.DataSetName = "Demo";
}

All necessary actions can be done in the Button_Click() event of the application. In the first place create the new report object, register the data and synchronize it with the report dictionary:
private void Button_Click(object sender, RoutedEventArgs e)
{
	StiReport report = new StiReport();
	
	// Add data to datastore
	report.RegData(dataSet1);
	
	// Fill dictionary
	report.Dictionary.Synchronize();

...

Then we need to create the report components. First, add the Header Band to the report page with the Text component that will display the title:
...

	StiPage page = report.Pages[0];
	
	// Create HeaderBand
	StiHeaderBand headerBand = new StiHeaderBand();
	headerBand.Height = 0.5;
	headerBand.Name = "HeaderBand";
	page.Components.Add(headerBand);
	
	// Create text on header
	StiText headerText = new StiText(new RectangleD(0, 0, 5, 0.5));
	headerText.Text = "CompanyName";
	headerText.HorAlignment = StiTextHorAlignment.Center;
	headerText.Name = "HeaderText";
	headerText.Brush = new StiSolidBrush(System.Drawing.Color.LightGreen);
	headerBand.Components.Add(headerText);

...

Next, add the Data Band with the Text component to which add an expression. This expression combines the Line number and the CompanyName data column from the Customers data source:
...

	// Create Databand
	StiDataBand dataBand = new StiDataBand();
	dataBand.DataSourceName = "Customers";
	dataBand.Height = 0.5;
	dataBand.Name = "DataBand";
	page.Components.Add(dataBand);
	
	// Create text
	StiText dataText = new StiText(new RectangleD(0, 0, 5, 0.5));
	dataText.Text = "{Line}.{Customers.CompanyName}";
	dataText.Name = "DataText";
	dataBand.Components.Add(dataText);

...

Finally, add the page Footer Band with the Text component which displays the text at the bottom of the page. Last action is a call of the WPF viewer which will build and display the report automatically:
...

	// Create FooterBand
	StiFooterBand footerBand = new StiFooterBand();
	footerBand.Height = 0.5;
	footerBand.Name = "FooterBand";
	page.Components.Add(footerBand);
	
	// Create text on footer
	StiText footerText = new StiText(new RectangleD(0, 0, 5, 0.5));
	footerText.Text = "Count - {Count()}";
	footerText.HorAlignment = StiTextHorAlignment.Right;
	footerText.Name = "FooterText";
	footerText.Brush = new StiSolidBrush(System.Drawing.Color.LightGreen);
	footerBand.Components.Add(footerText);
	
	report.ShowWithWpf();
}

На скриншоте ниже Вы можете увидеть результат выполнения данного кода:

Runtime Report Creation