UpdateProgress

<asp:UpdateProgress ID="UpdateProgress1" runat="server">
            <ProgressTemplate>
                <div />
                                            正在运行....请稍候.
                                        </td>
                                    </tr>
                                </table>
                            </td>
                        </tr>
                    </table>
                </div>
            </ProgressTemplate>
        </asp:UpdateProgress>