线程中访问控件

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using System.Threading;

namespace WindowsApplication1
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private delegate void MoveLabel(int val);//声明代理
        bool bWay = true;
        Thread td;
        private void Form1_Load(object sender, EventArgs e)
        {
            td = new Thread(new ThreadStart(ThreadFun));
            td.Start();
            this.button1.Text = "停止";
        }

        private void button1_Click(object sender, EventArgs e)
        {
            if(td.ThreadState == ThreadState.Suspended)
            {
                td.Resume();
                this.button1.Text = "停止";
            }
            else
            {
                this.button1.Text = "开始";
                td.Suspend();
            }
        }
        void SetOffset(int val)
        {
            this.label1.Location = new System.Drawing.Point(label1.Location.X + val, label1.Location.Y);
        }
        private void ThreadFun()
        {
            while (true)
            {
                int xF = this.Size.Width;
                int xL = this.label1.Location.X;
                int lblWidth = this.label1.Size.Width;
                if (bWay)
                {
                    if (xL + lblWidth < xF)
                    {
                        if (this.InvokeRequired)
                        {
                            MoveLabel d = new MoveLabel(SetOffset);
                            object[] arg = new object[] { 1 };//要传入的参数值
                            this.Invoke(d, arg);
                        }
                    }
                    else
                    {
                        bWay = false;
                    }
                }
                else
                {
                    if (xL >= 0)
                    {
                        if (this.InvokeRequired)
                        {
                            MoveLabel d = new MoveLabel(SetOffset);
                            object[] arg = new object[] { -1 };//要传入的参数值
                            this.Invoke(d, arg);
                        }
                    }
                    else
                    {
                        bWay = true;
                    }
                }
                Thread.Sleep(5);
            }
        }

        private void Form1_FormClosing(object sender, FormClosingEventArgs e)
        {
            td.Abort();
        }
    }
}

 

demo 下载：http://download.youkuaiyun.com/source/1584578

 

 

 

简单例子：

using System; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Drawing; using System.Text; using System.Windows.Forms; using System.Threading; namespace WindowsApplication13 { public partial class Form1 : Form { public Form1() { InitializeComponent(); } private delegate void MoveLabel(int val);//声明代理 Thread td; private void Form1_Load(object sender, EventArgs e) { td = new Thread(new ThreadStart(ThreadFun)); td.Start(); } void SetOffset(int val) { label1.Text = "从子线程里传入的值是：" + val.ToString(); } private void ThreadFun() { if (this.InvokeRequired) { MoveLabel d = new MoveLabel(SetOffset); object[] arg = new object[] { 1 };//要传入的参数值 this.Invoke(d, arg); } } } }