控件只能由创建它的线程来访问。其他线程想访问必须调用该控件的Invoke方法。Invoke有两个参数，一个是委托方法，一个是参数值。下面代码就是举例为ListBox添加数据。

using System; using System.ComponentModel; using System.Windows.Forms; using System.Threading;

namespace TestAutoUpEBooks {     public partial class Form1 : Form     {         delegate void SetListBox(string[] strValues);                   定义委托

        public Form1()         {             InitializeComponent();         }

        private void Form1_Load(object sender, EventArgs e)         {             Thread tr = new Thread(new ThreadStart(SetListBoxV));   创建线程             tr.Start();                                                                              启动线程         }

        private void SetListBoxV()         {             string[] s = new string[3] {"a","b","c"};             SetListBoxValue(s);         }

        private void SetListBoxValue(string[] values)         {             if (this.listBox1.InvokeRequired)                             当有新工作进程访问控件时InvokeRequired为True

            {                 SetListBox slb = new SetListBox(SetListBoxValue); 定义委托对象

                listBox1.Invoke(slb, new object[] { values});     用当前工作进程对控件进行访问

        }             else      对ListBox添加数据             {                 for (int i = 0; i < values.Length; i++)                 {                     listBox1.Items.Add((object)values[i]);                 }             }         }     } }

这样就实现了新建的工作进程对控件的访问。

多线程可以解决用户响应

namespace WindowsFormsApplication6

{

    public partial class Form1 : Form

    {

        public Form1()

        {

            InitializeComponent();

        }

        private delegate void addlistdlg( string str);

        private Thread mythread;

        private void addlistmethod( string mystr)

        {

            listBox1.Items.Add(mystr);

        }

        private void addlistfun()

        {

            for ( int i = 1 ; i < 90000 ; i ++ )

            {

                string mystr = " 第 " + i.ToString() + " 个 " ;

                if (listBox1.InvokeRequired)

                    listBox1.Invoke( new addlistdlg(addlistmethod), new Object[] { mystr });

                else

                    listBox1.Items.Add(mystr);

            }

        }

        private void button2_Click( object sender, EventArgs e) // 执行就会卡死

        {

            mythread = new Thread( new ThreadStart(addlistfun));

            mythread.Start();

        }

    }

}

if (listBox1.InvokeRequired)

listBox1.Invoke(new addlistdlg(addlistmethod), new Object[] { mystr });

else

listBox1.Items.Add(mystr);

的else部分只是我帮你补完整而已，就是变成如果不是线程里运行也可以执行的通用代码

实例在里这是每次执行

listBox1.Invoke(new addlistdlg(addlistmethod), new Object[] { mystr });

的

namespace WindowsFormsApplication6 {     public partial class Form1 : Form     {         public Form1()         {             InitializeComponent();         }

        private delegate void addlistdlg(string str);         private Thread mythread;

        private void addlistmethod(string mystr)         {             listBox1.Items.Add(mystr);         }         private void addlistfun()         {

            for (int i = 1; i < 90000; i++)             {                 string mystr = "第" + i.ToString() + "个";

                if (listBox1.InvokeRequired)                     listBox1.Invoke(new addlistdlg(addlistmethod), new Object[] { mystr });                 else                     listBox1.Items.Add(mystr);                 Thread.Sleep(1000);             }         }

        private void button2_Click(object sender, EventArgs e)//执行就会卡死         {             mythread = new Thread(new ThreadStart(addlistfun));             mythread.Start();         }     } }

在循环中加Thread.Sleep(1000);