c# 点击后按钮灰色，并执行进度条

        private void button1_Click(object sender, EventArgs e)
        {
            button1.Enabled = false;
            //中间是执行任务的函数和代码
            for (int i = 0; i <=1000; i++)
            {
                //进度条最大值
                progressBar1.Maximum = 1000;
                //进度条赋值
                this.progressBar1.Value =i;
                Thread.Sleep(50);
            }
            Application.DoEvents();
            button1.Enabled = true;
        }