ASP.NET获取<EmptyDataTemplate></EmptyDataTemplate>模板中的textBox控件值

/// <summary>
    /// GridView事件
    /// </summary>
    /// <param name="sender"></param>
    /// <param name="e"></param>
    protected void gvFieldValue_RowCommand(object sender, GridViewCommandEventArgs e)
    {
        if (e.CommandName.Equals("Add"))
        {
            GridViewRow row = (GridViewRow)((e.CommandSource as LinkButton).NamingContainer);//获取值
            string txtName = (row.FindControl("txtName") as TextBox).Text;
            string txtCode = (row.FindControl("txtCode") as TextBox).Text;

         }

     }