asp.net(C#)如何获取地磅称取的重量？急！web的

Question

如题，在线等

Answer 1

com接口么？那就和vb差不错的方法！

Answer 2

在winform里用的serialPort加backgroundWorker控件，在web里怎么获取啊！在winform里就写几行就实现了
       #region 打开端口
        private void OpenCOM()
        {
            try
            {
                this.sbWeightInfo = new StringBuilder();
                //this.rtDatas.Text = "";
                this.txtWT.Text = "0";
                this.LDataSteam.Text = "100";
                //this.serialPort1.ReadTimeout = 1000;                 this.serialPort1.Open();
                _continue = true;
                this.backgroundWorker1.RunWorkerAsync();            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.Message);
            }
        }
        #endregion        #region backgroundWorker EVENT
        private void backgroundWorker1_DoWork(object sender, DoWorkEventArgs e)
        {
            BackgroundWorker worker = ((BackgroundWorker)sender);
            while (_continue)
            {
                try
                {
                    string message = this.serialPort1.ReadLine();
                    /*
                    System.Threading.Thread.Sleep(300);
                    string message = (++count).ToString();
                    message = message.PadLeft(13, ' ');
                    if (count > 1000)
                        count = 0;
                     * */
                    //string weight = message.Substring(6, 7).Trim();                    string weight = message;
                    worker.ReportProgress(0, weight);
                }
                catch (TimeoutException te)
                {
                    _continue = false;
                    //MessageBox.Show(te.Message);
                }
                catch (Exception ex)
                {
                    _continue = false;
                    //MessageBox.Show(ex.Message);
                }
            }
        }        private void backgroundWorker1_ProgressChanged(object sender, ProgressChangedEventArgs e)
        {
            BackgroundWorker worker = sender as BackgroundWorker;
            Object userstate = e.UserState;
            string newWeight = (string)userstate;
            this.LDataSteam.Text = newWeight;
           // this.rtDatas.Text = newWeight + this.rtDatas.Text;
        }

Answer 3

写ActiveX控件才能在客户端调用

Answer 4

貌似自带一个mscomm的东西的，不知道怎么添加进去

Answer 5

我笔记本没有串口，弄了个串口转usb的东西，结果每次从地磅得到的数据都是???这些东西。郁闷