asp.net html table to DataTable

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protected
void Export(string
content,string
file)

    {

        HtmlDocument doc = new
HtmlDocument();

        doc.LoadHtml(content);

        HtmlNode table = doc.DocumentNode.SelectSingleNode("//table");

        DataTable dttable = new
DataTable();

        HtmlNode row = table.SelectSingleNode("//tr[@class=\"title\"]");

        string
name = string.Empty;

        foreach
(HtmlNode cell in
row.SelectNodes("th|td"))

        {

            name = cell.InnerText.Replace("\r\n", "").Trim();

            dttable.Columns.Add(name); // create columns from th

        }

        foreach
(var
rows in
doc.DocumentNode.SelectNodes("//tr[td]"))

        {  

            dttable.Rows.Add(rows.SelectNodes("td").Select(td => td.InnerText.Replace("\r\n", "").Trim()).ToArray());

        }

        //return dttable;

        dttable.Rows.RemoveAt(0);

        if
(dttable.Columns.Contains("操作"))

            dttable.Columns.Remove("操作");

        GemBox.ExcelLite.ExcelFile ef = SaveData.DataTableToExcel(dttable);

        Response.ContentType = "application/vnd.ms-excel";

        Response.AddHeader("Content-Disposition", "attachment; filename="
+ file);

        //string path = AppDomain.CurrentDomain.BaseDirectory + "xls_view\\" + file;

        string
path = string.Format("{0}xls_report\\{1}\\{2}", AppDomain.CurrentDomain.BaseDirectory, GetAdmin.cid, GetAdmin.account);

        if
(!System.IO.Directory.Exists(path))

        {

            System.IO.Directory.CreateDirectory(path);

        }

        path = System.IO.Path.Combine(path, file);

        ef.SaveXls(path);

        byte[] data = null; ;

        using
(System.IO.Stream str = new
System.IO.FileStream(path, System.IO.FileMode.Open))

        {

            data = new
byte[str.Length];

            str.Read(data, 0, data.Length);

        }

        this.Response.OutputStream.Write(data, 0, data.Length);

    }