在线程中修改窗体控件的属性

    private delegate void SetListBoxCallBack(string str);//声名委托
    private SetListBoxCallBack setlistboxcallback;//声名委托实例

        public Form1()
        {
            InitializeComponent();
        }

        private void Form1_Load(object sender, EventArgs e)
        {
            setlistboxcallback = new SetListBoxCallBack(SetListBox);
            Thread th = new Thread(new ThreadStart(Threadstart));//声名线线程
            th.Start();//线程开始
        }
        private void SetListBox(string str)
        {
            listBox1.Items.Add(str);
        }
        private void Threadstart()
        {
            this.listBox1.Invoke(setlistboxcallback, "aa");//利用控件的invoke方法，其中参数为（委托，参数列表);
        }