public string closeDevice()
{
if (iDevice <= 0)
{
return("无当前设备");
}
try
{
//关闭LCD
setLCDBright(false);
//清空显示文本
E7Lib.fw_lcd_dispclear(iDevice);
//关闭设备
E7Lib.fw_exit(iDevice);
return("OK");
} catch (Exception ex)
{
return(ex.Message);
}
}