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C# 中怎么利用Winform自定义一个单选框

发表于：2026-11-03 作者：千家信息网编辑

千家信息网最后更新 2026年11月03日，本篇文章给大家分享的是有关C# 中怎么利用Winform自定义一个单选框，小编觉得挺实用的，因此分享给大家学习，希望大家阅读完这篇文章后可以有所收获，话不多说，跟着小编一起来看看吧。添加一个用户控件，

千家信息网最后更新 2026年11月03日C# 中怎么利用Winform自定义一个单选框

本篇文章给大家分享的是有关C# 中怎么利用Winform自定义一个单选框，小编觉得挺实用的，因此分享给大家学习，希望大家阅读完这篇文章后可以有所收获，话不多说，跟着小编一起来看看吧。

添加一个用户控件，命名为：UCRadioButton

看一下有哪些属性

[Description("选中改变事件"), Category("自定义")]
public event EventHandler CheckedChangeEvent;

private Font _Font = new Font("微软雅黑", 12);
[Description("字体"), Category("自定义")]
public new Font Font
{
    get { return _Font; }
    set
    {
        _Font = value;
        label1.Font = value;
    }
}

private Color _ForeColor = Color.FromArgb(62, 62, 62);
[Description("字体颜色"), Category("自定义")]
public new Color ForeColor
{
    get { return _ForeColor; }
    set
    {
        label1.ForeColor = value;
        _ForeColor = value;
    }
}
private string _Text = "单选按钮";
[Description("文本"), Category("自定义")]
public string TextValue
{
    get { return _Text; }
    set
    {
        label1.Text = value;
        _Text = value;
    }
}
private bool _checked = false;
[Description("是否选中"), Category("自定义")]
public bool Checked
{
    get
    {
        return _checked;
    }
    set
    {
        if (_checked != value)
        {
            _checked = value;
            if (base.Enabled)
            {
                if (_checked)
                {
                    panel1.BackgroundImage = Properties.Resources.radioButton1;
                }
                else
                {
                    panel1.BackgroundImage = Properties.Resources.radioButton0;
                }
            }
            else
            {
                if (_checked)
                {
                    panel1.BackgroundImage = Properties.Resources.radioButton10;
                }
                else
                {
                    panel1.BackgroundImage = Properties.Resources.radioButton00;
                }
            }
            SetCheck(value);

            if (CheckedChangeEvent != null)
            {
                CheckedChangeEvent(this, null);
            }
        }
    }
}

private string _groupName;

[Description("分组名称"), Category("自定义")]
public string GroupName
{
    get { return _groupName; }
    set { _groupName = value; }
}

public new bool Enabled
{
    get
    {
        return base.Enabled;
    }
    set
    {
        base.Enabled = value;
        if (value)
        {
            if (_checked)
            {
                panel1.BackgroundImage = Properties.Resources.radioButton1;
            }
            else
            {
                panel1.BackgroundImage = Properties.Resources.radioButton0;
            }
        }
        else
        {
            if (_checked)
            {
                panel1.BackgroundImage = Properties.Resources.radioButton10;
            }
            else
            {
                panel1.BackgroundImage = Properties.Resources.radioButton00;
            }
        }
    }
}

当选中状态改变时需要根据分组名称来做相应的处理

private void SetCheck(bool bln)
{
    if (!bln)
        return;
    if (this.Parent != null)
    {
        foreach (Control c in this.Parent.Controls)
        {
            if (c is UCRadioButton && c != this)
            {
                UCRadioButton uc = (UCRadioButton)c;
                if (_groupName == uc.GroupName && uc.Checked)
                {
                    uc.Checked = false;
                    return;
                }
            }
        }
    }
}

当点击时改变选中状态

private void Radio_MouseDown(object sender, MouseEventArgs e)
{
    this.Checked = true;
}

加载时做一下处理，防止多选了

private void UCRadioButton_Load(object sender, EventArgs e)
{
    if (this.Parent != null && this._checked)
    {
        foreach (Control c in this.Parent.Controls)
        {
            if (c is UCRadioButton && c != this)
            {
                UCRadioButton uc = (UCRadioButton)c;
                if (_groupName == uc.GroupName && uc.Checked)
                {
                    Checked = false;
                    return;
                }
            }
        }
    }
}

来看下完整的代码吧

// 版权所有  黄正辉  交流群：568015492   QQ：623128629
// 文件名称：UCRadioButton.cs
// 创建日期：2019-08-15 16:03:13
// 功能描述：RadioButton
// 项目地址：https://gitee.com/kwwwvagaa/net_winform_custom_control
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Drawing;
using System.Data;
using System.Linq;
using System.Text;
using System.Windows.Forms;

namespace HZH_Controls.Controls
{
    [DefaultEvent("CheckedChangeEvent")]
    public partial class UCRadioButton : UserControl
    {
        [Description("选中改变事件"), Category("自定义")]
        public event EventHandler CheckedChangeEvent;

        private Font _Font = new Font("微软雅黑", 12);
        [Description("字体"), Category("自定义")]
        public new Font Font
        {
            get { return _Font; }
            set
            {
                _Font = value;
                label1.Font = value;
            }
        }

        private Color _ForeColor = Color.FromArgb(62, 62, 62);
        [Description("字体颜色"), Category("自定义")]
        public new Color ForeColor
        {
            get { return _ForeColor; }
            set
            {
                label1.ForeColor = value;
                _ForeColor = value;
            }
        }
        private string _Text = "单选按钮";
        [Description("文本"), Category("自定义")]
        public string TextValue
        {
            get { return _Text; }
            set
            {
                label1.Text = value;
                _Text = value;
            }
        }
        private bool _checked = false;
        [Description("是否选中"), Category("自定义")]
        public bool Checked
        {
            get
            {
                return _checked;
            }
            set
            {
                if (_checked != value)
                {
                    _checked = value;
                    if (base.Enabled)
                    {
                        if (_checked)
                        {
                            panel1.BackgroundImage = Properties.Resources.radioButton1;
                        }
                        else
                        {
                            panel1.BackgroundImage = Properties.Resources.radioButton0;
                        }
                    }
                    else
                    {
                        if (_checked)
                        {
                            panel1.BackgroundImage = Properties.Resources.radioButton10;
                        }
                        else
                        {
                            panel1.BackgroundImage = Properties.Resources.radioButton00;
                        }
                    }
                    SetCheck(value);

                    if (CheckedChangeEvent != null)
                    {
                        CheckedChangeEvent(this, null);
                    }
                }
            }
        }

        private string _groupName;

        [Description("分组名称"), Category("自定义")]
        public string GroupName
        {
            get { return _groupName; }
            set { _groupName = value; }
        }

        public new bool Enabled
        {
            get
            {
                return base.Enabled;
            }
            set
            {
                base.Enabled = value;
                if (value)
                {
                    if (_checked)
                    {
                        panel1.BackgroundImage = Properties.Resources.radioButton1;
                    }
                    else
                    {
                        panel1.BackgroundImage = Properties.Resources.radioButton0;
                    }
                }
                else
                {
                    if (_checked)
                    {
                        panel1.BackgroundImage = Properties.Resources.radioButton10;
                    }
                    else
                    {
                        panel1.BackgroundImage = Properties.Resources.radioButton00;
                    }
                }
            }
        }
        public UCRadioButton()
        {
            InitializeComponent();
        }

        private void SetCheck(bool bln)
        {
            if (!bln)
                return;
            if (this.Parent != null)
            {
                foreach (Control c in this.Parent.Controls)
                {
                    if (c is UCRadioButton && c != this)
                    {
                        UCRadioButton uc = (UCRadioButton)c;
                        if (_groupName == uc.GroupName && uc.Checked)
                        {
                            uc.Checked = false;
                            return;
                        }
                    }
                }
            }
        }

        private void Radio_MouseDown(object sender, MouseEventArgs e)
        {
            this.Checked = true;
        }

        private void UCRadioButton_Load(object sender, EventArgs e)
        {
            if (this.Parent != null && this._checked)
            {
                foreach (Control c in this.Parent.Controls)
                {
                    if (c is UCRadioButton && c != this)
                    {
                        UCRadioButton uc = (UCRadioButton)c;
                        if (_groupName == uc.GroupName && uc.Checked)
                        {
                            Checked = false;
                            return;
                        }
                    }
                }
            }
        }
    }
}

namespace HZH_Controls.Controls
{
    partial class UCRadioButton
    {
        ///  
        /// 必需的设计器变量。
        /// 

        private System.ComponentModel.IContainer components = null;

        ///  
        /// 清理所有正在使用的资源。
        /// 

        /// 如果应释放托管资源，为 true；否则为 false。
        protected override void Dispose(bool disposing)
        {
            if (disposing && (components != null))
            {
                components.Dispose();
            }
            base.Dispose(disposing);
        }

        #region 组件设计器生成的代码

        ///  
        /// 设计器支持所需的方法 - 不要
        /// 使用代码编辑器修改此方法的内容。
        /// 

        private void InitializeComponent()
        {
            this.label1 = new System.Windows.Forms.Label();
            this.panel1 = new System.Windows.Forms.Panel();
            this.SuspendLayout();
            // 
            // label1
            // 
            this.label1.Dock = System.Windows.Forms.DockStyle.Fill;
            this.label1.Font = new System.Drawing.Font("微软雅黑", 12F);
            this.label1.ForeColor = System.Drawing.Color.FromArgb(((int)(((byte)(62)))), ((int)(((byte)(62)))), ((int)(((byte)(62)))));
            this.label1.Location = new System.Drawing.Point(18, 0);
            this.label1.Name = "label1";
            this.label1.Padding = new System.Windows.Forms.Padding(5, 0, 0, 0);
            this.label1.Size = new System.Drawing.Size(215, 30);
            this.label1.TabIndex = 3;
            this.label1.Text = "单选按钮";
            this.label1.TextAlign = System.Drawing.ContentAlignment.MiddleLeft;
            this.label1.MouseDown += new System.Windows.Forms.MouseEventHandler(this.Radio_MouseDown);
            // 
            // panel1
            // 
            this.panel1.BackgroundImage = global::HZH_Controls.Properties.Resources.radioButton0;
            this.panel1.BackgroundImageLayout = System.Windows.Forms.ImageLayout.Zoom;
            this.panel1.Dock = System.Windows.Forms.DockStyle.Left;
            this.panel1.Location = new System.Drawing.Point(0, 0);
            this.panel1.Name = "panel1";
            this.panel1.Size = new System.Drawing.Size(18, 30);
            this.panel1.TabIndex = 2;
            this.panel1.MouseDown += new System.Windows.Forms.MouseEventHandler(this.Radio_MouseDown);
            // 
            // UCRadioButton
            // 
            this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.None;
            this.Controls.Add(this.label1);
            this.Controls.Add(this.panel1);
            this.Name = "UCRadioButton";
            this.Size = new System.Drawing.Size(233, 30);
            this.Load += new System.EventHandler(this.UCRadioButton_Load);
            this.MouseDown += new System.Windows.Forms.MouseEventHandler(this.Radio_MouseDown);
            this.ResumeLayout(false);

        }

        #endregion

        private System.Windows.Forms.Label label1;
        private System.Windows.Forms.Panel panel1;
    }
}