gridview导出数据到excel,如何将16进制改为10进制

gridview导出数据到excel,怎么将16进制改为10进制
  GridView2.AllowPaging = False
        filldate1()
        Response.Clear()
        Response.Buffer = True
        Response.Charset = "GB2312"
        Response.Write("<meta http-equiv=Content-Type content=text/html;charset=GB2312>")
        Response.AppendHeader("Content-Disposition", "attachment;filename=" + HttpUtility.UrlEncode(FileName, Encoding.UTF8).ToString())
        Response.ContentEncoding = System.Text.Encoding.GetEncoding("GB2312")
        Response.ContentType = "application/ms-excel"
        Page.EnableViewState = False
        Dim strWriter As New StringWriter()
        Dim htw As New HtmlTextWriter(strWriter)
        'GridView1.RenderControl(htw)
        GridView2.RenderControl(htw)
        Response.Write(strWriter.ToString())
        'range.NumberFormatLocal = "@"
        'GridView2.Item.Cells(0).NumberFormatLocal = "@"
        'mso-number-format:"\@"
        Response.Flush()
        Response.End()
        GridView2.AllowPaging = True
        filldate1()

现在是这样的
我想换成6000000000000这样的

[解决办法]
在数字前面加个'
[解决办法]
输出数值类型的前面全部加上“'”，转化为文本。　这不是16进制，是科学记数法