open the url in same window ?

String url = context.Activities.Where(a => a.ID == activityID).FirstOrDefault().ReportUrl + "?panachayatLocationId=" + panchayatRajLocationID + "&startDate=" + startDate.ToShortDateString() + "&endDate=" + endDate.ToShortDateString() + "&isPrint=true&isOffice=";
                    
url += ddlViewType.SelectedValue == "1" ? false : true;

url += "&status=" + ddlStatus.SelectedValue;

String strscript = "<script language=javascript>window.open('" + url + "');</script> btnEnter.OnClientClick = "window.location.href(\"" + url + "\")";
if (!ClientScript.IsStartupScriptRegistered("clientScript"))
                        ClientScript.RegisterStartupScript(Page.GetType(), "clientScript", strscript);