学习一周的C#，做一个用户信息注册，求各位大神全程指导

Question

 我想问一下c#那 个时针如何打代码，让它变成进度加载0~100%以及进度条的做法求帮忙

Answer 1

用Timer 和 ProgressBar 控件

Answer 2

不知道你说的时针是不是倒计时。private int i = 0;        public int I
        {
            get
            {
                return i;
            }
            set
            {
                i = value;
                progressBar1.Value = i;
                label1.Text = Convert.ToString(i) + "%";
                if (i == 100)
                {
                    button1.Enabled = true;
                }
                else
                {
                    button1.Enabled = false;
                }
            }
        }        private void Form1_Load(object sender, EventArgs e)
        {
            timer1.Enabled = true;
            timer1.Interval = 100;
        }        private void timer1_Tick(object sender, EventArgs e)
        {
            if (I < 100)
            {
                I++;
            }
            else
            {
                timer1.Enabled = false;
            }
        }

Answer 3

各位大神，刚才那计时器我已经搞好了，不过我还是要谢谢大家的参与 。现在问题是我想问一下这么我这代码实现不了三级流动
        private void comboBox2_SelectedIndexChanged(object sender, EventArgs e)
        {
            if (comboBox1.SelectedItem.ToString() == "信息学院")
            {
                comboBox2.Items.Clear();
                comboBox2.Items.Add("软件技术");
                comboBox2.Items.Add("网络技术");
                comboBox2.Items.Add("计算机技术");
            
            }
            else
                if (comboBox1.SelectedItem.ToString() == "交通学院")
                {
                    comboBox2.Items.Clear();
                    comboBox2.Items.Add("汽车营销");
                    comboBox2.Items.Add("城控");
                    comboBox2.Items.Add("城运");
                }
                else if (comboBox1.SelectedItem.ToString() == "畜牧学院")
                {
                    comboBox2.Items.Clear();
                    comboBox2.Items.Add("喂鸡");
                    comboBox2.Items.Add("养猪");
                    comboBox2.Items.Add("卖鱼");
 
                }