How to display full pdf files in full screen on a web page

hi i use the code, to display the file that I saved in the database. the question is: why the file can not be performed with a full screen.

 protected void View(object sender, EventArgs e)
         {
            

             int peraturan_id = int.Parse((sender as LinkButton).CommandArgument);
             Session["peraturan_id"] = peraturan_id;
             ClientScript.RegisterStartupScript(this.GetType(), "open", "window.open('file_view.aspx','_blank' );", true);
         }

 if (!IsPostBack)
        {
            if (Session["peraturan_id"] != null)
            {
                int peraturan_id = Convert.ToInt32(Session["peraturan_id"]);
                string embed = "<object data=\"{0}{1}\" type=\"application/pdf\" width=\"500px\" height=\"300px\">";
                embed += "If you are unable to view file, you can download from <a href = \"{0}{1}&download=1\">here</a>";
                //  embed += " or download <a target = \"_blank\" href = \"http://get.adobe.com/reader/\">Adobe PDF Reader</a> to view the file.";
                embed += "</object>";
                ltEmbed.Text = string.Format(embed, ResolveUrl("~/FileCS.ashx?peraturan_id="), peraturan_id);
            }
        }