Question

c# panel.controls[]的使用问题，请帮忙看看。

如下图，很简单的程序，button点击生成随机0-4整数。然后在panel1的那行三个label分别显示hello，world，！但是显示不是想要的效果，帮忙看看要怎么改。

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Answer 1

private void button1_Click(object sender, EventArgs e)
        {
            init();
            int num;
            num = randnum();

            foreach (Control ctl in panel1.Controls)
            {
                if (ctl is Label)
                {
                    if (int.Parse(ctl.Name.Substring(5, ctl.Name.Length - 5)) == num+1)
                    {
                        ctl.Text = "Hello";
                        ctl.Visible = true;
                    }

                    if (int.Parse(ctl.Name.Substring(5, ctl.Name.Length - 5)) == num + 6)
                    {
                        ctl.Text = "World";
                        ctl.Visible = true;
                    }

                    if (int.Parse(ctl.Name.Substring(5, ctl.Name.Length - 5)) == num + 11)
                    {
                        ctl.Text = "!";
                        ctl.Visible = true;
                    }
                }
            }
        }