线程间操作无效: 从不是创建控件“label4”的线程访问它

[shixiangyan0522]

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Net;
using System.Net.Sockets;
using System.IO;
using System.IO.Ports;
using System.Threading;
using System.Runtime.InteropServices;
namespace GetCode
{
public partial class Frm_Main : Form
{ byte[] recvBytes = new byte[1024];
byte[] dataBuff = new byte[7];
static string shun_liusu;
static string shun_liuliang;
static string leiji;
// Socket sockC;
TimeOutSock timeSock = new TimeOutSock();
Thread thrCli;
private delegate void FlushClient();//代理
//Thread thread = null;

public Frm_Main()
{
InitializeComponent();


}


private void View1_CellContentClick(object sender, DataGridViewCellEventArgs e)
{

}

private void Frm_Main_Load(object sender, EventArgs e)
{ while (true)
{
byte[] retdata = new byte[] { 0x55, 0xAA, 0x04, 0x00, 0x00, 0x00, 0x00, 0x48, 0x10, 0x5C, 0x79, 0x00, 0x00, 0x00, 0x31 };
//byte[] retdata1 = new byte[] { 0x55, 0xAA, 0x03, 0x00, 0x00, 0x00, 0x00, 0x48, 0x10, 0x32, 0x5B, 0x00, 0x00, 0x00, 0xE8 };
byte[] shunshibuff = new byte[4];
byte[] liusubuff = new byte[4];
byte[] leijiliangbuff = new byte[4];

shunshibuff[3] = retdata[3];
shunshibuff[2] = retdata[4];
shunshibuff[1] = retdata[5];
shunshibuff[0] = retdata[6];

shun_liuliang = BitConverter.ToSingle(shunshibuff, 0).ToString("0.00");
liusubuff[3] = retdata[7];
liusubuff[2] = retdata[8];
liusubuff[1] = retdata[9];
liusubuff[0] = retdata[10];
shun_liusu = BitConverter.ToSingle(liusubuff, 0).ToString("0.00");

leijiliangbuff[3] = retdata[11];
leijiliangbuff[2] = retdata[12];
leijiliangbuff[1] = retdata[13];
leijiliangbuff[0] = retdata[14];
leiji = BitConverter.ToUInt32(leijiliangbuff, 0).ToString();
if (retdata[2] == 01)
{
label1.Text = shun_liuliang + "\r\n";
label1.Refresh();
label1.Text += leiji + "\r\n";
label1.Refresh();
label1.Text += shun_liusu + "\r\n";
label1.Refresh();
}
else if (retdata[2] == 02)
{
label2.Text = shun_liuliang + "\r\n";
Application.DoEvents();
label2.Text += leiji + "\r\n";
Application.DoEvents();
label2.Text += shun_liusu + "\r\n";
Application.DoEvents();
}
else if (retdata[2] == 03)
{
label3.Text = shun_liuliang + "\r\n";
Application.DoEvents();
label3.Text += leiji + "\r\n";
Application.DoEvents();
label3.Text += shun_liusu + "\r\n";
Application.DoEvents();
}
else if (retdata[2] == 04)
{
this.label4.Text = shun_liuliang + "\r\n";
label1.Refresh();
label4.Text += leiji + "\r\n";
label1.Refresh();
label4.Text += shun_liusu + "\r\n";
Application.DoEvents();

}

}
}

public void printData(string str1)
{
//创建文件流对象实例
string path = "d:/logs/";
if (!Directory.Exists(path))
{
Directory.CreateDirectory(path);
}
path = path + DateTime.Today.ToString("yyyyMMdd") + "RecDataLog.txt";
FileStream fs = new FileStream(path, FileMode.Append);
StreamWriter sw = new StreamWriter(fs, Encoding.GetEncoding("GB2312"));
try
{
sw.WriteLine(str1);
}
catch (Exception ex)
{
printData(ex.Message);
}
finally
{
sw.Close();
fs.Close();
}
}

private void label1_Click(object sender, EventArgs e)
{}
我希望能让4个label根据输入的不同不断地刷新，但是这个程序不出现窗口，一直在循环，网上说需要线程控制，但是参数调用时，我不知道该怎么改相应的地方，希望大家能多帮帮我，我刚开始学习C#，不是太懂。

[threenewbee]

不要写在FormLoad中，或者在FormLoad前面加一句 this.Show();

[智商余额不足]

msdn这个牛逼知识库都不会去看 http://msdn.microsoft.com/zh-cn/library/ms171728%28v=VS.80%29.aspx

[智商余额不足]

楼主可以安装个离线的msdn library，先问msdn再问csdn

[shixiangyan0522]

this.show()不行。

[yuanqn]

Control.CheckForIllegalCrossThreadCalls = false;

[taotao_live]

因为不是一个线程里的，所以你必须通过当前Form的委托来处理。。

[vssvss]

引用 6 楼 yuanqn 的回复:

Control.CheckForIllegalCrossThreadCalls = false;

这个是治标不治本 微软是不提倡跨线程访问的 可以用委托来实现。

//主线程
 public delegate void UpdateMessage(string mes);
 public void UpdatePortMessage(string mes)
        {
            this.txtMessage.AppendText(string.Format("Connected {0}. succeed", mes) + "\r\n");
            this.txtClientIP.Text = mes;
        }


// 线程1
  UpdateMessage upPort = new UpdateMessage(UpdatePortMessage);
                        this.BeginInvoke(upPort, point);

[石灰石石英石]

form是主线程，所有的控件都是主线程的东西，你其他的线程当然不能访问了，简单点的实现就是，你放一些全局变量，然后把控件的值放在这些变量里面，其他的线程访问这些全局变量。

[卧_槽]

需要一个委托

[屌絲來襲]

沒看內容，看到標題我只能說，跨線程操作控件請使用委託

[我真的不是菜鸟]

跨线程操作控件用Invoke()

[CqCoder]

CheckForIllegalCrossThreadCalls 或委托调用 建议使用 委托调用

[人生导师]

参考这个文章中的解决方案：http://www.cnblogs.com/zhili/archive/2013/05/10/APM.html