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
计算
安全
数据库
网络和加速
企业服务
[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_controlusing 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 { /// <summary> /// 必需的设计器变量。 /// </summary> private System.ComponentModel.IContainer components = null; /// <summary> /// 清理所有正在使用的资源。 /// </summary> /// <param name="disposing">如果应释放托管资源，为 true；否则为 false。</param> 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 /// <summary> /// 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。 /// </summary> 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; }}以上就是C# 中怎么利用Winform自定义一个单选框，小编相信有部分知识点可能是我们日常工作会见到或用到的。希望你能通过这篇文章学到更多知识。更多详情敬请关注亿速云行业资讯频道。
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原文链接：https://my.oschina.net/dotnet9/blog/4438230
