Stop a process after button clicked in Asp page???

I have an ASP.Net Web page with a Report Viewer control  that displays a local report. The report viewer dynamically bind DataSet and *.rdlc reports at runtime.

    public void Button1_Click(object sender, EventArgs e)
    {           ReportViewer1.Reset();
                ReportViewer1.ProcessingMode = ProcessingMode.Local;
                LocalReport localReport = ReportViewer1.LocalReport;
                localReport.ReportPath = "*.rdlc";
                ReportDataSource ds = new ReportDataSource();
      &nbs ...