Invoke custom method in Crystal report default print button click event

We have requirement is when i click on default crystal report print button, it will open printoptions window, when i select/click the Ok button, on button click event i want to insert data into the database(Call custom method). we tried so many way at last we got the solution for that as shown in bellow link
My Link: http://dotnetgoutham.blogspot.in/2012/06/get-control-name-in-pageload-event.html
Step 1:
 public string GetPostBackControlId(Page page)
    {
        if (!page.IsPostBack)
            return string.Empty;


        Control control = null;
        // first we will check the "__EVENTTARGET" because if post back made by the controls
        // which used "_doPostBack" function also available in Request.Form collection.
        string controlName = page.Request.Params["__EVENTTARGET"];
        if (!String.IsNullOrEmpty(controlName))
        {
            control = page.FindControl(controlName);
        }
        else
        {
            // if __EVENTTARGET is null, the control is a button type and we need to
            // iterate over the form collection to find it


            // ReSharper disable TooWideLocalVariableScope
            string controlId;
            Control foundControl;
            // ReSharper restore TooWideLocalVariableScope


            foreach (string ctl in page.Request.Form)
            {
                // handle ImageButton they having an additional "quasi-property" 
                // in their Id which identifies mouse x and y coordinates
                if (ctl.EndsWith(".x") || ctl.EndsWith(".y"))
                {
                    controlId = ctl.Substring(0, ctl.Length - 2);
                    foundControl = page.FindControl(controlId);
                }
                else
                {
                    foundControl = page.FindControl(ctl);
                }


                if (!(foundControl is Button || foundControl is ImageButton)) continue;


                control = foundControl;
                //hdPrintValue.Value = control.ID;
                Session["HiddenValue"] = ctl.Substring(ctl.Length - 7, 5);
                break;
            }
        }
        return control == null ? String.Empty : control.ID;
    }
Step 2:
        string str = GetPostBackControlId(this.Page);
        if (Session["HiddenValue"] != null)
        {
            if (Session["HiddenValue"].ToString() == "ctl01" && str == "CrystalReportViewer1")
            {
                //ScriptManager.RegisterClientScriptBlock(this.Page, this.GetType(), "ShowMessage", "alert('Updated Successfully');", true);
                try
                {
                    //Call custom Method() here....
                }
                catch (Exception ex)
                {
                   
                }
            }
        }