I'm not sure why you want to do that, however if you want to view any report in a specific report viewer, something like this will work:
public void ShowReport(string ReportFileName, DataSet MyDataSource)
{
ReportDocument _report = new ReportDocument();
_report.Load(Server.MapPath(ReportFileName));
_report.SetDataSource(MyDataSource);
MyViewer.ReportSource = _report;
MyViewer.Visible = true;
MyViewer.RefreshReport();
}