异步委托实现多线程winform控件编程

        private void button1_Click(object sender, EventArgs e)
        {
            ThreadStart ts = new ThreadStart(add);
            Thread th = new Thread(ts);
            th.Start();
        }

        #region 异步委托实现多线程winform控件编程

        delegate void changText(string ss);

        void add()
        {
            int a = 1;
            int b = 2;
            string sum = Convert.ToString(a + b);
            this.BeginInvoke(new changText(intoText), sum); //计算完成需要在一个文本框里显示
        }

        void intoText(string sum)
        {
            if (this.InvokeRequired)
            {
                this.BeginInvoke(new changText(intoText), sum);
            }
            else
            {
                textBox1.Text = sum;
            }
        }

        #endregion