如何将单选按钮的功能（单击一个按钮，其他按钮自动清除）用于其他控件

Question

首先，我为我的英语水平不足表示歉意。

我正在创建自己的图像按钮，我想让我的控件像单选按钮控件一样相互交互。

当用户在一组中选择一个选项按钮（也称为单选按钮）时，其他按钮应该被自动清除。

在这种情况下，这里有两张图片（1m.png、2m.png）。如果我单击一个图像按钮，图像会更改为 1m.png，而其他图像会自动更改为 2m.png。

感谢阅读，请多多指教！

Answer 1

您可以通过重写 OnClick 事件来实现。我刚刚编写了这段代码并且运行顺利。我确实通过更改控件的 BackColor 进行了测试。根据您的需要，您可以更改图像、背景图像或任何其他属性。

using System;
using System.Linq;
using System.Windows.Forms;

namespace Whosebug
{
    public partial class FormMain : Form
    {
        public FormMain()
        {
            InitializeComponent();
        }
    }

    public partial class ImageButton : Button
    {
        //Override OnClick event.
        protected override void OnClick(EventArgs e)
        {
            /*
              "Unselect" every ImageButton that belongs to the 
              same group as  the current ImageButton and 
              select the current one.
            */
            do
            {
                /*
                    Change Image of current ImageButton. 
                    I'm changing the BackColor for simplicity. You have to remove this line.
                */
                this.BackColor = System.Drawing.Color.Green;
                //this.BackgroundImage = 1m.png;

                //If ImageButton parent is null, then it doesn't belong in a group.
                if (this.Parent == null)
                    break;

                /*
                    Else loop through all other ImageButtons of the same group and clear them. 
                    Include System.Linq for this part.
                */
                foreach (ImageButton button in this.Parent.Controls.OfType<ImageButton>())
                {
                    //If button equals to current ImageButton, continue to the next ImageButton.
                    if (button == this)
                        continue;

                    //Else change the Image.
                    button.BackColor = System.Drawing.Color.Red;
                    //this.BackgroundImage = 2m.png;
                }
            }
            while (false);

            //Continue with the regular OnClick event.
            base.OnClick(e);
        }
    }
}

如何将单选按钮的功能（单击一个按钮，其他按钮自动清除）用于其他控件

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