asp.net 导出的excel样式好单调。怎么设置呢

asp.net 导出的excel样式好单调。如何设置呢
到网上找了好多，没什么抛砖引玉的效果，不知道谁有比较好的demo吗？
------解决方案--------------------
http://hi.baidu.com/onlymeteor/item/302318e799e513a8c10d7583

http://www.cr173.com/html/15602_1.html


------解决方案--------------------

    public void ReaderToExcel(string fileName, System.Data.DataTable dt)

    {

        System.IO.StringWriter oSW = new System.IO.StringWriter();

        System.Web.UI.HtmlTextWriter oHW = new System.Web.UI.HtmlTextWriter(oSW);

        System.Web.UI.WebControls.DataGrid dg = new System.Web.UI.WebControls.DataGrid();

        dg.DataSource = dt;

        dg.DataBind();




        dg.RenderControl(oHW);


        Response.Clear();

        Response.Charset = "gb2312";

        Response.ContentType = "text/csv";

        Response.AppendHeader("Content-Disposition", "attachment;filename=" + fileName + ".xls");


        Response.Write(oSW.ToString());

        Response.Flush();


        Response.End();

    }