本文介绍了帮助:“InvalidOperationException未处理”的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
粗体线是我在调试过程中遇到错误的地方。
Line with bold is where I get there error during debugging.
Quote:
System.Windows.Forms.dll中出现未处理的System.InvalidOperationException类型异常
附加信息:跨线程操作无效:控制'txtReceive'从其创建的线程以外的线程访问。
An unhandled exception of type 'System.InvalidOperationException' occurred in System.Windows.Forms.dll
Additional information: Cross-thread operation not valid: Control 'txtReceive' accessed from a thread other than the thread it was created on.
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.IO.Ports;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
namespace SerialPort
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
cmdClose.Enabled = false;
foreach (String s in System.IO.Ports.SerialPort.GetPortNames())
{
txtPort.Items.Add(s);
}
}
public System.IO.Ports.SerialPort sport;
public void serialport_connect(String port, int baudrate , Parity parity, int databits, StopBits stopbits)
{
DateTime dt = DateTime.Now;
String dtn = dt.ToShortTimeString();
sport = new System.IO.Ports.SerialPort(
port, baudrate, parity, databits, stopbits);
try
{
sport.Open();
cmdClose.Enabled = true;
cmdConnect.Enabled = false;
txtReceive.AppendText("[" + dtn + "] " + "Connected\n");
sport.DataReceived += new SerialDataReceivedEventHandler(sport_DataReceived);
}
catch (Exception ex) { MessageBox.Show(ex.ToString(), "Error"); }
}
private void sport_DataReceived(object sender, SerialDataReceivedEventArgs e)
{
DateTime dt = DateTime.Now;
String dtn = dt.ToShortTimeString();
txtReceive.AppendText("["+dtn+"] "+"Received: "+sport.ReadExisting()+"\n");
}
private void cmdConnect_Click(object sender, EventArgs e)
{
String port = txtPort.Text;
int baudrate = Convert.ToInt32(cmbbaudrate.Text);
Parity parity = (Parity)Enum.Parse(typeof(Parity), cmbparity.Text);
int databits = Convert.ToInt32(cmbdatabits.Text);
StopBits stopbits = (StopBits)Enum.Parse(typeof(StopBits), cmbstopbits.Text);
serialport_connect(port, baudrate, parity, databits, stopbits);
}
private void button1_Click(object sender, EventArgs e)
{
DateTime dt = DateTime.Now;
String dtn = dt.ToShortTimeString();
String data = txtDatatoSend.Text;
sport.Write(data);
txtReceive.AppendText("[" + dtn + "] " + "Sent: " + data + "\n");
}
private void cmdClose_Click_1(object sender, EventArgs e)
{
DateTime dt = DateTime.Now;
String dtn = dt.ToShortTimeString();
if (sport.IsOpen)
{
sport.Close();
cmdClose.Enabled = false;
cmdConnect.Enabled = true;
txtReceive.AppendText("[" + dtn + "] " + "Disconnected\n");
}
}
private void button2_Click(object sender, EventArgs e)
{
DateTime dt = DateTime.Now;
String dtn = dt.ToShortTimeString();
const char stx = (char)2;
const char etx = (char)3;
sport.Write(stx + "01P00202##" + etx + "\n");
txtReceive.AppendText("[" + dtn + "] " + "Sent: 01P00202##\n");
}
}
}
推荐答案
这篇关于帮助:“InvalidOperationException未处理”的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持!