Export Datatable to Excel in asp.net

public void ExportToExcel(DataTable dt, string name, HttpResponse res)

    {

        string attachment = "attachment; filename=" + name;

        res.ClearContent();

        res.AddHeader("content-disposition", attachment);

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

        string tab = "";

        int colcount = 0;

        foreach (DataColumn din in dt.Columns)

        {

            // Response.Write(tab + dc.ColumnName.Remove(0, dc.ColumnName.IndexOf("-") + 1));

            res.Write(tab + din.ColumnName);

            tab = "\t";

            colcount++;

        }

        res.Write("\n");

        int i;

        foreach (DataRow dr in dt.Rows)

        {

            tab = "";

            for (i = 0; i < dt.Columns.Count; i++)

            {

                res.Write(tab + dr[i].ToString());

                tab = "\t";

            }

            res.Write("\n");

        }

        res.End();

    }