来自串行端口的文本出现在富文本框中，但是没有作为字符串提取? [英] Text from a serial port appearing in a rich text box but not being picked up as string?

问题描述

大家好，

我正在读取一个串行端口并将输出放入字符串中.
但是字符串是空白的，但是，如果我在其中插入一个消息框，则会造成足够的间隙以允许文本出现在字符串中.我使用的是基于预期回复时间的延迟.
出现的代码行是

Hi All,

I am reading a serial port and putting output to a string.
But the string is blank, however if I stick a message box in, it causes enough of a gap to allow the text to appear in the string. I am using a delay based on the length of the expected reply.
The line of code that appears is

reply = rtbIncoming.text

rtbIncoming.Text中包含来自设备的字符串.是否由于线程分开而导致文本框中的答复出现在一个线程上，所以从comms线程到UI线程的延迟没有足够的延迟吗?由于我有以下建议

rtbIncoming.Text has a string in it from the device. Is it because of seperate threads the reply in the text box appears on one thread, there is not enough of a delay for it to get from the comms thread to the UI thread? As I have had the following advice

So instead of a line like this:
   rtbIncoming.Text = reply;

我会尝试这样的代码:

I''d try code like this:

this.Invoke(new MethodInvoker(delegate()
{
   rtbIncoming.Text = reply;
}));

这似乎使用了与我正在使用数据已接收事件"的代理类似的代理.

This would appear to use a delegate similar to the one I am using the Data Recieved Event.

    private void port_DataReceived_1(object sender,SerialDataReceivedEventArgs e)   
        {
           // MessageBox.Show("Here!!");
           int valueWait = WaitForData(12, 10);
          InputData = myComPort.ReadExisting(); 
          if (InputData != String.Empty)
          {
            this.BeginInvoke(new SetTextCallback(SetText), new object[]
{InputData});
            
          }
            /*
             this.Invoke(new MethodInvoker(delegate()
               {
                ReplyData=  rtbIncoming.Text;
               }));
             */
        }

我认为我已经看过的上一个答案是这样的，因为我现在有两个委托到同一个线程，但没有成功！帮助！
Glenn

I think the previous answer I had over looked this as I now have two delegates to the same thread with no success! HELP!!
Glenn

推荐答案

已解决！ (我认为)我对您提出的问题有点含糊，但是我不得不思考并在昨天发送来解决该问题后安排该代表.今天早上，我的电脑变得更糟了，于是Windows重新安装了，杂乱无章，杂乱无章.当我得到一个来源，然后找到另一个不矛盾但足够接近以形成问号的来源时，有人能推荐一个可靠的信息重新线程和委托的好来源吗?

格伦(Glenn)

Solved! (I think) the question was a little a vague I grant you but it got me to thinking and placing the delegate after the send appeared to cure the problem yesterday. This morning my PC took a turn for the worse so thats a Windows reinstall, mutter, mutter. Can some one recomend a good source of reliable info regaurding threading and delegates as I get one source and then find another that does not contradict but comes near enough for question marks to form.

Glenn

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