protected void PrintAllPages(object sender, EventArgs e)
    {
        GvLineBooking.AllowPaging = false;

        GvLineBooking.DataBind();

        StringWriter sw = new StringWriter();

        HtmlTextWriter hw = new HtmlTextWriter(sw);

        GvLineBooking.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());

        GvLineBooking.AllowPaging = true;

        GvLineBooking.DataBind();
    }
    protected void ExportToExcel(object sender, EventArgs e)
    {
        Response.Clear();
        Response.Buffer = true;
        Response.AddHeader("content-disposition", "attachment;filename=LinePlan.xls");
        Response.Charset     = "";
        Response.ContentType = "application/vnd.ms-excel";
        using (StringWriter sw = new StringWriter())
        {
            HtmlTextWriter hw = new HtmlTextWriter(sw);

            //To Export all pages
            GvLineBooking.AllowPaging = false;
            this.BindGvorder();

            GvLineBooking.HeaderRow.BackColor = Color.White;
            foreach (TableCell cell in GvLineBooking.HeaderRow.Cells)
            {
                cell.BackColor = GvLineBooking.HeaderStyle.BackColor;
            }
            foreach (GridViewRow row in GvLineBooking.Rows)
            {
                row.BackColor = Color.White;
                foreach (TableCell cell in row.Cells)
                {
                    if (row.RowIndex % 2 == 0)
                    {
                        cell.BackColor = GvLineBooking.AlternatingRowStyle.BackColor;
                    }
                    else
                    {
                        cell.BackColor = GvLineBooking.RowStyle.BackColor;
                    }
                    cell.CssClass = "textmode";
                }
            }

            GvLineBooking.RenderControl(hw);

            //style to format numbers to string
            string style = @"<style> .textmode { } </style>";
            Response.Write(style);
            Response.Output.Write(sw.ToString());
            Response.Flush();
            Response.End();
        }
    }