asp.net(C#)如何获取地磅称取的重量？急！web的

如题，在线等

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接口

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com接口么？那就和vb差不错的方法！

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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
C# code:
#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