c# - c#在DataReceived内部调用另一个方法时，串行端口读取被锁定

Question

我有一个工作正常的代码，如下所示

private async void DataReceivedHandler(object sender, SerialDataReceivedEventArgs e)
    {
        try
        {
            SerialPort sp = (SerialPort)sender;
            var serialDevice = sender as SerialPort;
            var buffer = new byte[serialDevice.BytesToRead];
            serialDevice.Read(buffer, 0, buffer.Length);
            string indata2 = FormatHelper.ByteArrayToString(buffer);

            await Application.Current.Dispatcher.BeginInvoke(new Action(() =>
             {
                 canSniffFlowData.Text = indata2;
             }));
           
        }
        catch (Exception exc)
        {

            MessageBox.Show(" " + exc.ToString());
        }
    }

但是，当我尝试将传入数据转换为调度程序内的模型列表或 datareceived 函数内的任何位置时，datareceived 事件开始每隔一分钟而不是几秒触发一次

示例：当我在 Dispatcher.BeginInvoke 中添加以下代码时

var formattedModel = FormatHelper.FormaSnaptData(indata2);

--> 这是我的 FormaSnaptData 和 ByteArrayToString 方法。

public static async Task<List<DataModel>> FormaSnaptData(string input)
{
    List<DataModel> result = new List<DataModel>();
    string pattern = "7E.+?7E";
    Regex rgx = new Regex(pattern, RegexOptions.IgnoreCase);
    MatchCollection matches = rgx.Matches(input);
    if (matches.Count > 0)
    {
        Console.WriteLine("{0} ({1} matches):", input, matches.Count);

        DataModel currentData;
        foreach (Match match in matches)
        {
            currentData = new DataModel();
            string formattedString = "";
            int index = 0;
            // Her iki satırda bir boşluk koy ( bytelar düzgün ayrışsın diye ) 
            foreach (var item in match.Value)
            {
                index++;
                if (index % 2 == 0)
                {
                    formattedString += item;
                    formattedString += " ";
                }
                else
                {
                    formattedString += item;
                }
            }
            Console.WriteLine("Original -->" + match.Value);
            currentData.ByteStringList = formattedString.Split(' ').ToList();
            // Kontrol byte ını düzenle ( 7D 5E gelenleri 7E yap ve 5E'yi sil)
            for (int i = 0; i < currentData.ByteStringList.Count(); i++)
            {
                if (currentData.ByteStringList[i].Equals("7D"))
                {
                    currentData.ByteStringList[i] = "7E";
                    currentData.ByteStringList.RemoveAt(i + 1);
                }
            }
            Console.WriteLine("Formatted 2-->" + String.Join(" ", currentData.ByteStringList));
            // Burada gelen datayı formatlamamız lazım 


            currentData.CanId = currentData.ByteStringList.ToList()[10] + currentData.ByteStringList.ToList()[11];
            int numberOfItems = currentData.ByteStringList.Count(); // 24 ise 8 data var ona göre alıcaz 
            int idCount = numberOfItems - 16;
            List<string> dxList = new List<string>();
            for (int i = 0; i < idCount; i++)
            {
                dxList.Add(currentData.ByteStringList.ToList()[i + 12]);
            }
            currentData.Dx = dxList;
            currentData.ShownStringList = String.Join(" ", currentData.ByteStringList);
            result.Add(currentData);

            Console.WriteLine("Formatted -->" + String.Join(" ", currentData.ByteStringList));
        }
    }
    return result;
}

public static string ByteArrayToString(byte[] ba)
{
    StringBuilder hex = new StringBuilder(ba.Length * 2);
    foreach (byte b in ba)
        hex.AppendFormat("{0:x2}", b);
    return hex.ToString();
} 

我也在我的模拟器中尝试了这种方法。我将所有传入的数据保存到 txt 文件，然后在模拟器演示中读取它们，这种方法不会阻止任何东西并且工作得很好。我认为某些东西会触发“DataReceivedHandler”并停止它。任何解决方案都会很棒。对不起，我仍在处理不整洁的代码 =/

标签： c#multithreadingasync-awaitserial-portdispatcher