单击椭圆形背景颜色后如何切换它

Question

这就是我的代码，它适用于按钮，但不适用于我的 OvalShape。我需要它来制作 C# 中的 Master Mind 游戏。椭圆形应该 改变颜色 单击它后。它应该能够变成6种颜色的红色，黄色，蓝色，白色，绿色和紫色。

     private void ovalShape1_4_Click(object sender, EventArgs e)
    {
        Control ctrl = ((Control)sender);
        switch (ctrl.BackColor.Name)
        {
            case "Red":
                ctrl.BackColor = Color.Yellow;
                break;
            case "Black":
                ctrl.BackColor = Color.Green;
                break;
            case "White":
                ctrl.BackColor = Color.Red;
                break;
            case "Yellow":
                ctrl.BackColor = Color.Purple;
                break;
            default:
                ctrl.BackColor = Color.Red;
                break;


using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using Microsoft.VisualBasic.PowerPacks;
namespace Mastermind2
{
    public static class ControlCollectionExtension
    {
        public static IList<OvalShape> ToList(this ShapeCollection aiShapeCollection)
        {
            IList<OvalShape> aoShapes = new List<OvalShape>();
            foreach (OvalShape ctrl in aiShapeCollection)
                aoShapes.Add(ctrl);
            return aoShapes;
        }
    }
}

Answer 1

使公共变量

int index = 0;

之后做这个逻辑，愿这对你有所帮助

 private void ovalShape1_4_Click(object sender, EventArgs e)
{
OvalShape ctrl = ((OvalShape)sender);
        switch (index)
        {
            case 0:
                ctrl.BackColor = Color.Yellow;
                break;
            case 1:
                ctrl.BackColor = Color.Green;
                break;
            case 2:
                ctrl.BackColor = Color.Red;
                break;
            case 3:
                ctrl.BackColor = Color.Purple;
                break;
            default:
                ctrl.BackColor = Color.Red;
                index = 0;
                break;
        }
}

Answer 2

我的猜测是，您没有将 Click 事件处理程序分配给 OvalShape 控件。

   foreach (OvalShape ctrl in aiShapeCollection)
      ctrl.Click += ovalShape1_4_Click;
      aoShapes.Add(ctrl);