放到GroupBox控件里无论是否选中都只能输出“您选择的权限如下”。拖出来却能运行。

    private void button1_Click(object sender, EventArgs e)
        {
            string strpop = "您选择的权限如下";
            foreach(Control ctrl in this.Controls)
            {
                if(ctrl.GetType().Name=="CheckBox")
                {
                    CheckBox cBox=(CheckBox)ctrl;
                    if(cBox.Checked==true)
                    {
                        strpop+="\n"+cBox.Text;
                    }
                    else
                    {
                        strpop = "无";
                    }
                }
            }
            MessageBox.Show(strpop);
        }

        private void button2_Click(object sender, EventArgs e)
        {
            
            foreach (Control ctrl in this.Controls)
            {
                if (ctrl.GetType().Name == "CheckBox")
                {
                    CheckBox cBox = (CheckBox)ctrl;
                    cBox.Checked = true;
                }
            }
        }

        private void button3_Click(object sender, EventArgs e)
        {
            foreach (Control ctrl in this.Controls)
            {
                if (ctrl.GetType().Name == "CheckBox")
                {
                    CheckBox cBox = (CheckBox)ctrl;
                    cBox.Checked = false;
                }
            }
        }