【发布时间】：2023-03-18 03:48:01
【问题描述】：
我有 C#/.NET 程序，它使用 COM 端口和带有 WCF 服务的 SQL CE 数据库。有时程序会变得无响应（窗口冻结），即使在调试模式下我也找不到原因。
我可以在重启我的电脑或 COM 端口后重启程序。问题不在于我的 COM 端口问题，因为我已经在许多 PC 上尝试过，并且都有相同的问题。
我该如何解决这个问题？
private void timer_Tick(object sender, EventArgs e)
{
try
{
labeltimer.Text = DateTime.Now.ToString();
if (timerstarted == true)
{
return;
}
timerstarted = true;
_CARDCODE = 0;
string error = "";
bool hasbassed = false;
if (this._Close == true)
{
this.Close();
}
if (serialPort1.IsOpen)
{
if (i < 8)
{
i++;
}
else
{
i = 0;
}
to[0] = (byte)(128 + i);
try
{
serialPort1.Write(to, 0, 1);
}
catch (System.Exception ex)
{
ListViewItem Lvi = new ListViewItem((++rowcount).ToString());
Lvi.SubItems.Add("");
Lvi.SubItems.Add("");
Lvi.SubItems.Add("Disconnected");
Lvi.SubItems.Add("");
listView.Items.Add(Lvi);
StartPort();
}
if (progressBar.Value >= 1500)
progressBar.Value = 0;
else
progressBar.Value += 10;
if (serialPort1.BytesToRead != 0)
{
byte[] data = new byte[serialPort1.BytesToRead];
from = new byte[3];
try
{
serialPort1.Read(data, 0, data.Length);
}
catch (System.Exception ex)
{
ListViewItem LVi = new ListViewItem((++rowcount).ToString());
LVi.SubItems.Add("");
LVi.SubItems.Add("");
LVi.SubItems.Add("Disconnected");
LVi.SubItems.Add("");
listView.Items.Add(LVi);
StartPort();
}
// data.Length == 4 by Button or HassPassed
if (data.Length == 4)
{
if (data[1] > 2)
DBS.AddButtonPass(data[0], data[1] / 4);
else
{
DBS.EditPass((int)data[0]);
timerstarted = false;
return;
}
}
else if ((data[data.Length - 1] != 255) || (data.Length < 4))
{
from[0] = data[0];
from[1] = 0;
from[2] = 0;
serialPort1.Write(from, 0, 3);
timerstarted = false;
return;
}
//RegistoringSubscriber_ID Add Subscriber Card
else if ((RegistoringSubscriber_ID > 0) && (RegisterCheckpoint != 0) && (data[0] == RegisterCheckpoint))
{
Registoring = false;
if (RegistorNewCard(Convert.ToInt32(data[2].ToString() + data[3].ToString() + data[4].ToString())) > 0)
FormBringPC.AnswerType = 1;
else
FormBringPC.AnswerType = 2;
RegistoringSubscriber_ID = 0;
error = "register card";
}
// RegistoringSubscriber_ID < 0 Add Bonus Card
else if ((RegistoringSubscriber_ID < 0) && (RegisterCheckpoint != 0) && (data[0] == RegisterCheckpoint))
{
Registoring = false;
if (RegistorBonusCard(Convert.ToInt32(data[2].ToString() + data[3].ToString() + data[4].ToString())) > 0)
FormBringPC.AnswerType = 1;
else
FormBringPC.AnswerType = 2;
RegistoringSubscriber_ID = 0;
error = "register Bonus card";
}
else if ((List_Checkpoint_ID.Contains(data[0]) && ((data[1] == 130) || (data[1] == 129))))
{
// DBS.EditPass((int)data[0]);
}
else if ((List_Checkpoint_ID.Contains(data[0]) && (data.Length == 7)))
{
_CARDCODE = Convert.ToInt32(data[2].ToString() + data[3].ToString() + data[4].ToString());
GlobalTypes.InvalidPass pass = DBS.CheckPassStatus(_CARDCODE, (int)data[0], (int)data[1]);
if (pass == GlobalTypes.InvalidPass.Valid)
{
from[0] = data[0];
from[1] = 1;
from[2] = 1;
serialPort1.Write(from, 0, 3);
LBTitle.Text = DateTime.Now.ToLongTimeString();
hasbassed = true;
}
else
{
from[0] = data[0];
from[1] = 0;
from[2] = 0;
serialPort1.Write(from, 0, 3);
switch (pass)
{
case GlobalTypes.InvalidPass.InvalidCard:
{
error = "Չգրանցված քարտ";
break;
}
case GlobalTypes.InvalidPass.InvalidCount:
{
error = "Այց. քանակ";
break;
}
case GlobalTypes.InvalidPass.InvalidGraphic:
{
error = "Ժամանակ hh:mm:ss";
break;
}
case GlobalTypes.InvalidPass.InvalidPeriod:
{
error = "Ժամանակահատված xxxx.dd.yyy";
break;
}
case GlobalTypes.InvalidPass.InvalidStatus:
{
error = "Հառացված աբոնենտ";
break;
}
case GlobalTypes.InvalidPass.InvalidSuscribe:
{
error = "Անհայտ բաժանորդ";
break;
}
default:
{
error = "esim inch";
break;
}
}
}
}
else if ((List_Checkpoint_ID.Contains(data[0]) && (data.Length > 0)))
{
try
{
byte[] ticket = new byte[data.Length - 6];
for (int ii = 0; ii < data.Length - 6; ii++)
{
ticket[ii] = data[ii + 2];
}
_CARDCODE = Convert.ToInt32(Encoding.ASCII.GetString(ticket.ToArray()));
GlobalTypes.HasPass pass = DBS.CheckTicketPassStatus(_CARDCODE, (int)data[0], (int)data[1]);
if (pass == GlobalTypes.HasPass.TruePass)
{
from[0] = data[0];
from[1] = 1;
from[2] = 1;
serialPort1.Write(from, 0, 3);
LBTitle.Text = DateTime.Now.ToLongTimeString();
hasbassed = true;
}
else
{
from[0] = data[0];
from[1] = 0;
from[2] = 0;
serialPort1.Write(from, 0, 3);
switch (pass)
{
case GlobalTypes.HasPass.CardNotFound:
{
error = "Not registored ticket";
break;
}
case GlobalTypes.HasPass.CardRepeat:
{
error = "ReEntring";
break;
}
case GlobalTypes.HasPass.ValidationPeriodError:
{
error = "Ժամանակ hh:mm:ss";
break;
}
case GlobalTypes.HasPass.SeasonError:
{
error = "Ժամանակահատված xxxx.dd.yyy";
break;
}
case GlobalTypes.HasPass.WeekOfDayError:
{
error = "Day of Weak";
break;
}
default:
{
error = "esim inch";
break;
}
}
}
}
catch { timerstarted = false; return; }
}
if (rowcount >= 10)
{
rowcount = 0;
listView.Items.Clear();
}
ListViewItem lvi = new ListViewItem((++rowcount).ToString());
lvi.SubItems.Add(data[0].ToString());
if (data.Length == 4)
hasbassed = true;
if (((data[1] == 2) || (data[1] == 8)) && ((data.Length == 4) || (Dictionary_Chekpoint[data[0]].CheckPointType == 2)))
{
lvi.SubItems.Add("Ելք");
}
else
{
lvi.SubItems.Add("Մուտք");
}
if (data.Length != 4)
lvi.SubItems.Add(_CARDCODE.ToString());
else
lvi.SubItems.Add("Հերթապահ");
lvi.SubItems.Add(error);
if (hasbassed == true)
{
lvi.BackColor = Color.LightGreen;
}
else
{
lvi.BackColor = Color.LightPink;
}
listView.Items.Add(lvi);
}
}
else MessageBox.Show("Serial port is closed!", "RS232 tester", MessageBoxButtons.OK, MessageBoxIcon.Error);
timerstarted = false;
}
catch
{
timerstarted = false;
return;
}
}
【问题讨论】：
-
寻求调试帮助的问题（“为什么这段代码不起作用？”）必须包括所需的行为、特定的问题或错误以及在问题本身中重现它所需的最短代码。没有明确问题陈述的问题对其他读者没有用处。见：How to create a Minimal, Complete, and Verifiable example.
-
对吗？？？这是我重复的代码
-
即使您无法隔离问题的位置，您至少可以在串行端口调用周围添加一些日志，以找出哪个阻塞了您的应用程序主线程。这将允许您提供一小段代码来说明您的问题，而不是倾倒您的整个代码以期望我们完成您的工作。我也非常确信 Justin 是对的，并且您正在 GUI 线程中进行串行端口阻塞调用。
标签： c# sql .net wcf serial-port