【摘要】 在传统的B/S结构中,当客户端向服务器请求新的数据时,服务器必须对整个页面的全部数据进行重新处理然后把结果返回给客户端。这样不仅增加了服务器负担而且存在着大量重复的数据,因此很难用于实时监控中。通过把OPC的数据采集功能和AJAX.NET的异步通讯功能及VML的画图功能相结合实现了异步Web过程监控。这种方法不仅能减轻服务器的运行负担而且能增强B/S监控系统的实时性。更多还原

【Abstract】 In traditional B/S system,the server must refresh all data of the whole page and transmit them to the client when the client requires new data.This way not only increases the burden on the server,but also brings about a lot of iterative data,so it is difficult to use this way in real-time monitoring system.The asynchronous web process supervision was realized by using the combination of data acquisition function of OPC,asynchronous communication function of AJAX.NET and painting function of VML.This proposed method can not only reduce the overloads of the server,but strengthen the real-time capability of the B/S supervision and control system.更多还原