asp.net wih send email in gridview

private string GridViewToHtml(GridView gv)
{
    StringBuilder sb = new StringBuilder();
    StringWriter sw = new StringWriter(sb);
    HtmlTextWriter hw = new HtmlTextWriter(sw);
    gv.RenderControl(hw);
    return sb.ToString();
}

protected void SendMailButton_Click(object sender, EventArgs e)
{
    MailMessage mail = new MailMessage();
    mail.Body = GridViewToHtml(GridView1);
    mail.IsBodyHtml = true;
    //Send email
}