assigning multiple datasource to a report.rdlc in asp.net C#

Question

Actually i am new one for Reporting in asp.net C#,
i have 3 data source one data source i want to display on same report as DataList Format in Ractangele cotrol of report and other two data source i want to merge code behind and than i assing to same report and display as a gird format in Table control of report so how can i do this approach can any one paste code here where i get idea

can i assing dynamically values from datatable to the report.rdlc textboxes like this
MyText = CType(ReportDocument.ReportDefinition.ReportObjects(Text3), TextObject);
MyText.Text = ds.Table(0).Row(0).Item(0).ToString() ;