protected void Page_Load(object sender, EventArgs e)
        {
            BindView();
            string usersname;

            if (!IsPostBack)
            {
                try
                {
                    if (Request.QueryString["usersname"] != null)
                    {
                        usersname = Request.QueryString["usersname"].ToString();
                        UsersBll.delete(usersname);
                        BindView();
                        Page.ClientScript.RegisterClientScriptBlock(typeof(Object), "alert", "<script>alert('删除成功!');</script>");
                    }
                }
                catch (Exception ex)
                {
                    Response.Write("错误原因:" + ex.Message);
                }
            }
        }