hi Developers , 
i want to disable or prevent a .Pdf file on browser .
 
in my project i am opening a .Pdf from database to new tab . now i want to Disable Printable or Download from the End user. because all attachments are govt property and valuables.
this is my code for open a .Pdf file on a new tab .
 protected void Button1_Click(object sender, EventArgs e)
    {
        SqlConnection con = Connection.DBConn();
        string str = "SELECT KeyFactsFileName FROM tbl_question where id='" + sno + "' and  status='A'";
        SqlDataAdapter sda = new SqlDataAdapter(str, con);
        DataSet ds = new DataSet();
        sda.Fill(ds);
        string path = ds.Tables[0].Rows[0]["KeyFactsFileName"].ToString();
        string urlName = Request.Url.AbsoluteUri;
        urlName = urlName.Remove(urlName.LastIndexOf("/"));
        string url = string.Format("{0}/Files/{1}", urlName, path);
        string script = "<script type='text/javascript'>window.open('" + url + "')</script>";
        this.ClientScript.RegisterStartupScript(this.GetType(), "script", script);
    }
how can i done this task , could anyone know please suggest me to how can i done this task
thanking with
Paul.S