asp.net程序Excel转成XML档

通过Asp.net(C#)应用程序读取本地上传的Excle文件,存放到DataSet中,通过DataSet中的方法直接生成XML文件.
C# Code
 if (this.FileUpload1.PostedFile != null)
        {
            string filename = this.FileUpload1.FileName.ToString();
            string path = @Server.MapPath("../File/") + filename;
            this.FileUpload1.PostedFile.SaveAs(path);
            //读取用户上传的Excle文件
            string conn="Provider = Microsoft.Jet.OLEDB.4.0 ;Data Source ='"+path+"';Extended Properties=Excel 8.0";
            OleDbConnection olecon = new OleDbConnection(conn);
            olecon.Open();
            //注意表名,打开Excel文件后,最底部分页的Excle名字,
            //默认是$Sheet1,$Sheet2,$Sheet3
            string sql = "select * from [$Sheet1]";
            OleDbDataAdapter oleda = new OleDbDataAdapter(sql,conn);
            oleda.Fill(ds);
            olecon.Close();
            this.GridView1.DataSource = ds;
            this.GridView1.DataBind();
            string file_name = "20091126002.xml";
        &nb