新手请教：这种ComboBox与Button结合的效果如何实现？


如上图：

根据ComboBox的下拉列表的选项，实现button的不同选择以及自由选择

[解决办法]

C# code

 private void cmbDevity_SelectedIndexChanged(object sender, EventArgs e)//根据combobox选择        {            foreach (Control c in Controls)             //清空颜色            {                if (c is Button)                {                    c.BackColor = Color.Transparent;                }            }            if (this.cmbDevity.Text.Equals("奇数"))            {                foreach (Control c in Controls)         //遍历控件，判断                {                    if (c is Button && int.Parse(c.Text) % 2 != 0)                    {                        c.BackColor = Color.Yellow;                    }                }            }            else            {                foreach (Control c in Controls)                {                    if (c is Button && int.Parse(c.Text) % 2 == 0)                    {                        c.BackColor = Color.Yellow;                    }                }            }        }
[解决办法]
        private void comboBox1_SelectedIndexChanged(object sender, EventArgs e)
       {
           int index = comboBox1.SelectedIndex;
           switch (index)
           {
               //全选,所有按钮紫色
               case 0:
                   button1.BackColor = Color.Fuchsia;
                   button2.BackColor = Color.Fuchsia;
                   button3.BackColor = Color.Fuchsia;
                   button4.BackColor = Color.Fuchsia;
                   button5.BackColor = Color.Fuchsia;
                   button6.BackColor = Color.Fuchsia;
                   button7.BackColor = Color.Fuchsia;
                   button8.BackColor = Color.Fuchsia;
                   button9.BackColor = Color.Fuchsia;
                   button10.BackColor = Color.Fuchsia;
                   break;//不要跳到下个分支
               case 1://奇数
                   button1.BackColor = Color.Transparent;
                   button2.BackColor = Color.Fuchsia;
                   button3.BackColor = Color.Transparent;
                   button4.BackColor = Color.Fuchsia;
                   button5.BackColor = Color.Transparent;
                   button6.BackColor = Color.Fuchsia;
                   button7.BackColor = Color.Transparent;
                   button8.BackColor = Color.Fuchsia;
                   button9.BackColor = Color.Transparent;
                   button10.BackColor = Color.Fuchsia;
                   break;//不要跳到下个分支
               case 2://偶数
                   button1.BackColor = Color.Fuchsia;
                   button2.BackColor = Color.Transparent;
                   button3.BackColor = Color.Fuchsia;
                   button4.BackColor = Color.Transparent;
                   button5.BackColor = Color.Fuchsia;
                   button6.BackColor = Color.Transparent;
                   button7.BackColor = Color.Fuchsia;
                   button8.BackColor = Color.Transparent;
                   button9.BackColor = Color.Fuchsia;
                   button10.BackColor = Color.Transparent;
                   break;//不要跳到下个分支
               case 3://大数
                   button1.BackColor = Color.Transparent;
                   button2.BackColor = Color.Transparent;
                   button3.BackColor = Color.Transparent;
                   button4.BackColor = Color.Transparent;
                   button5.BackColor = Color.Transparent;
                   button6.BackColor = Color.Fuchsia;
                   button7.BackColor = Color.Fuchsia;
                   button8.BackColor = Color.Fuchsia; 
 
                   button9.BackColor = Color.Fuchsia;
                   button10.BackColor = Color.Fuchsia;
                   break;//不要跳到下个分支
               case 4://小数
                   button1.BackColor = Color.Fuchsia;
                   button2.BackColor = Color.Fuchsia;
                   button3.BackColor = Color.Fuchsia;
                   button4.BackColor = Color.Fuchsia;
                   button5.BackColor = Color.Fuchsia;
                   button6.BackColor = Color.Transparent;
                   button7.BackColor = Color.Transparent;
                   button8.BackColor = Color.Transparent;
                   button9.BackColor = Color.Transparent;
                   button10.BackColor = Color.Transparent;
                   break;//不要跳到下个分支
               case 5://质数
                   button1.BackColor = Color.Transparent;
                   button2.BackColor = Color.Transparent;
                   button3.BackColor = Color.Fuchsia;
                   button4.BackColor = Color.Fuchsia;
                   button5.BackColor = Color.Transparent;
                   button6.BackColor = Color.Fuchsia;
                   button7.BackColor = Color.Transparent;
                   button8.BackColor = Color.Fuchsia;
                   button9.BackColor = Color.Transparent;
                   button10.BackColor = Color.Transparent;
                   break;//不要跳到下个分支
               case 6://合数
                   button1.BackColor = Color.Fuchsia;
                   button2.BackColor = Color.Fuchsia;
                   button3.BackColor = Color.Transparent;
                   button4.BackColor = Color.Transparent;
                   button5.BackColor = Color.Fuchsia;
                   button6.BackColor = Color.Transparent;
                   button7.BackColor = Color.Fuchsia;
                   button8.BackColor = Color.Transparent;
                   button9.BackColor = Color.Fuchsia;
                   button10.BackColor = Color.Fuchsia;
                   break;//不要跳到下个分支
           }
       }