How do I save changes makes by devexpress report designer in run time

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C#

DevExpress

in my app, I use devexpress report designer which run in run time. what do i want is how save the template when i click a button because i used the following thee is no hope:

protected void ASPxReportDesigner1_SaveReportLayout(object sender, SaveReportLayoutEventArgs e)
        {
            try
            {
                designArray = e.ReportLayout;
                MemoryStream ms = new MemoryStream();

                ReportViewer1.Report.LoadLayoutFromXml(new MemoryStream(e.ReportLayout));

                IEnumerable allCells = ReportViewer1.Report.AllControls<xrtablecell>();
                foreach (XRTableCell cell in allCells)
                    if (cell.Text.Length > 0)
                        if (cell.Text.StartsWith("tag#"))
                            cell.Tag = cell.Text.Replace("tag#", "");

                ReportViewer1.Report.SaveLayoutToXml(ms);
                ms.Position = 0;

                string result = new StreamReader(ms).ReadToEnd();

                string fullName = ReportViewer1.Report.GetType().FullName;
                if (fullName == "ReportsDLL._BaseReport.BaseReport")
                    fullName = "ReportsDLL." + ((BaseReport)ReportViewer1.Report).ReportModule + "." + ReportViewer1.Report.Name;

                string file = HttpUtility.HtmlEncode(System.Web.Hosting.HostingEnvironment.ApplicationPhysicalPath) + @"\Reporting\RepTemp\" + fullName + ".repx";

                if (File.Exists(file))
                    File.Delete(file);

                File.WriteAllText(file, result);
            }
            catch (Exception ex)
            {
                if (ex.InnerException != null)
                    Response.Write(ex.InnerException);
            }
        }
<pre lang="c#">

kindly, i want this asap