case "variables_get":

                        string varname1 = rttnodes[0].SelectSingleNode("field[@name='VAR']").InnerText.Trim(); ;

                        string code1 = "";

                        bool is_float1 = false;


                        if (block_typename == "drv_h595_shumaguan_set_show_float")
                        {
                            /*
                              <block type="mainsub" id="[f^2qVdN0jRQtMhe./Ov" x="190" y="410">
                                    <statement name="STACK">
                                      <block type="drv_h595_shumaguan_set_show_float" id="bgV./[Y=#/=Px*J|]}Ug">
                                        <field name="dev_no_to_use">2个4位数码管模块1</field>
                                        <value name="show_num">
                                          <block type="variables_get" id="Yu,N^V3`U.#7ZrhusL=T">
                                            <field name="VAR" id="ejID$.o^*E_o[`VJ0ZO3">123</field>
                                          </block>
                                        </value>
                                      </block>
                                    </statement>
                                  </block>
                             */
                            is_float1 = true;

                        }

                        if (block_typename == "drv_uart_send_float_str")
                        {
                            is_float1 = true;

                        }    if (block_typename == "append_float_to_strele")
                        {
                            is_float1 = true;

                        }