print all pages in grid view

<asp:button id="Button1" runat="server" onclick="Button1_Click" text="چاپ صفحه جاری" xmlns:asp="#unknown" />

protected void PrintAllPages(object sender, EventArgs e)
        {
            GridView1.AllowPaging = false;
            GridView1.DataBind();
            GridView1.HeaderRow.Cells[9].Visible = false;
            GridView1.FooterRow.Cells[9].Visible = false;
            // Loop through the rows and hide the cell in the first column
            for (int i = 0; i < GridView1.Rows.Count; i++)
            {
                GridViewRow row = GridView1.Rows[i];
                row.Cells[9].Visible = false;
            }
            StringWriter sw = new StringWriter();
            HtmlTextWriter hw = new HtmlTextWriter(sw);
            hw.AddStyleAttribute(HtmlTextWriterStyle.Direction, "rtl");
            GridView1.RenderControl(hw);
            string gridHTML = sw.ToString().Replace("\"", "'")
                .Replace(System.Environment.NewLine, "");
            StringBuilder sb = new StringBuilder();
            sb.Append("<script type="text/javascript">");
            sb.Append("window.onload = new function(){");
            sb.Append("var printWin = window.open('', '', 'left=0");
            sb.Append(",top=0,width=1000,height=600,status=0');");
            sb.Append("printWin.document.write(\"");
            sb.Append(gridHTML);
            sb.Append("\");");
            sb.Append("printWin.document.close();");
            sb.Append("printWin.focus();");
            sb.Append("printWin.print();");
            sb.Append("printWin.close();};");
            sb.Append("</script>");
            ClientScript.RegisterStartupScript(this.GetType(), "GridPrint", sb.ToString());
            GridView1.AllowPaging = true;
            GridView1.DataBind();
        }
        protected void PrintCurrentPage(object sender, EventArgs e)
        {
            
            GridView1.PagerSettings.Visible = false;
            GridView1.DataBind();
            GridView1.HeaderRow.Cells[9].Visible = false;
            GridView1.FooterRow.Cells[9].Visible = false;
            // Loop through the rows and hide the cell in the first column
            for (int i = 0; i < GridView1.Rows.Count; i++)
            {
                GridViewRow row = GridView1.Rows[i];
                row.Cells[9].Visible = false;
            }
            StringWriter sw = new StringWriter();
            HtmlTextWriter hw = new HtmlTextWriter(sw);
            hw.AddStyleAttribute(HtmlTextWriterStyle.Direction, "rtl");
            GridView1.RenderControl(hw);            
            string gridHTML = sw.ToString().Replace("\"", "'")
                .Replace(System.Environment.NewLine, "");
            StringBuilder sb = new StringBuilder();
            sb.Append("<script type="text/javascript">");            
            sb.Append("window.onload = new function(){");
            sb.Append("var printWin = window.open('', '', 'left=0");
            sb.Append(",top=0,width=1000,height=600,status=0');");
            sb.Append("printWin.document.write(\"");
            sb.Append(gridHTML);
            sb.Append("\");");
            sb.Append("printWin.document.close();");
            sb.Append("printWin.focus();");
            sb.Append("printWin.print();");
            sb.Append("printWin.close();};");
            sb.Append("</script>");
            ClientScript.RegisterStartupScript(this.GetType(), "GridPrint", sb.ToString());
            GridView1.PagerSettings.Visible = true;
            GridView1.DataBind();
        }