（六）c#Winform自定义控件-单选框

前提

入行已经7,8年了，一直想做一套漂亮点的自定义控件，于是就有了本系列文章。

开源地址：https://gitee.com/kwwwvagaa/net_winform_custom_control
<https://gitee.com/kwwwvagaa/net_winform_custom_control>

如果觉得写的还行，请点个 star 支持一下吧

欢迎前来交流探讨： 企鹅群568015492 
<https://shang.qq.com/wpa/qunwpa?idkey=6e08741ef16fe53bf0314c1c9e336c4f626047943a8b76bac062361bab6b4f8d>

目录

https://www.cnblogs.com/bfyx/p/11364884.html
<https://www.cnblogs.com/bfyx/p/11364884.html>

准备工作

准备4个图片，分别对应选中，没选中，选中禁用，没选中禁用



复选框需要支持分组，当同一面板上具有多种选择的时候，分组就显得更为重要了

开始

添加一个用户控件，命名为：UCRadioButton

看一下有哪些属性
1 [Description("选中改变事件"), Category("自定义")] 2 public event EventHandler
CheckedChangeEvent; 3 4 private Font _Font = new Font("微软雅黑", 12); 5
[Description("字体"), Category("自定义")] 6 public new Font Font 7 { 8 get {
return _Font; } 9 set 10 { 11 _Font = value; 12 label1.Font = value; 13 }
14 } 15 16 private Color _ForeColor = Color.FromArgb(62, 62, 62); 17
[Description("字体颜色"), Category("自定义")] 18 public new Color ForeColor 19 { 20
get { return _ForeColor; } 21 set 22 { 23 label1.ForeColor = value; 24
_ForeColor = value; 25 } 26 } 27 private string _Text = "单选按钮"; 28
[Description("文本"), Category("自定义")] 29 public string TextValue 30 { 31 get
{return _Text; } 32 set 33 { 34 label1.Text = value; 35 _Text = value; 36
} 37 } 38 private bool _checked = false; 39 [Description("是否选中"), Category("
自定义")] 40 public bool Checked 41 { 42 get 43 { 44 return _checked; 45 }
46 set 47 { 48 if (_checked != value) 49 { 50 _checked = value; 51 if (
base.Enabled) 52 { 53 if (_checked) 54 { 55 panel1.BackgroundImage =
Properties.Resources.radioButton1; 56 } 57 else 58 { 59
panel1.BackgroundImage = Properties.Resources.radioButton0; 60 } 61 } 62
else 63 { 64 if (_checked) 65 { 66 panel1.BackgroundImage =
Properties.Resources.radioButton10; 67 } 68 else 69 { 70
panel1.BackgroundImage = Properties.Resources.radioButton00; 71 } 72 } 73
SetCheck(value); 74 75 if (CheckedChangeEvent != null) 76 { 77
CheckedChangeEvent(this, null); 78 } 79 } 80 } 81 } 82 83 private
string _groupName; 84 85 [Description("分组名称"), Category("自定义")] 86 public
string GroupName 87 { 88 get { return _groupName; } 89 set { _groupName =
value; } 90 } 91 92 public new bool Enabled 93 { 94 get 95 { 96 return
base.Enabled; 97 } 98 set 99 { 100 base.Enabled = value; 101 if (value) 102
{103 if (_checked) 104 { 105 panel1.BackgroundImage =
Properties.Resources.radioButton1;106 } 107 else 108 { 109
panel1.BackgroundImage = Properties.Resources.radioButton0; 110 } 111 } 112
else 113 { 114 if (_checked) 115 { 116 panel1.BackgroundImage =
Properties.Resources.radioButton10;117 } 118 else 119 { 120
panel1.BackgroundImage = Properties.Resources.radioButton00; 121 } 122 } 123
}124 }
当选中状态改变时需要根据分组名称来做相应的处理
1 private void SetCheck(bool bln) 2 { 3 if (!bln) 4 return; 5 if (this
.Parent !=null) 6 { 7 foreach (Control c in this.Parent.Controls) 8 { 9 if
(cis UCRadioButton && c != this) 10 { 11 UCRadioButton uc = (UCRadioButton)c;
12 if (_groupName == uc.GroupName && uc.Checked) 13 { 14 uc.Checked = false; 15
return; 16 } 17 } 18 } 19 } 20 }
当点击时改变选中状态
1 private void Radio_MouseDown(object sender, MouseEventArgs e) 2 { 3 this
.Checked =true; 4 }
加载时做一下处理，防止多选了
1 private void UCRadioButton_Load(object sender, EventArgs e) 2 { 3 if (
this.Parent != null && this._checked) 4 { 5 foreach (Control c in this
.Parent.Controls) 6 { 7 if (c is UCRadioButton && c != this) 8 { 9
UCRadioButton uc = (UCRadioButton)c; 10 if (_groupName == uc.GroupName &&
uc.Checked)11 { 12 Checked = false; 13 return; 14 } 15 } 16 } 17 } 18 }
来看下完整的代码吧
1 // 版权所有 黄正辉 交流群：568015492 QQ：623128629 2 // 文件名称：UCRadioButton.cs 3 //
创建日期：2019-08-15 16:03:13 4 // 功能描述：RadioButton 5 // 项目地址：
https://gitee.com/kwwwvagaa/net_winform_custom_control 6 using System; 7 using
System.Collections.Generic; 8 using System.ComponentModel; 9 using
System.Drawing; 10 using System.Data; 11 using System.Linq; 12 using
System.Text; 13 using System.Windows.Forms; 14 15 namespace
HZH_Controls.Controls 16 { 17 [DefaultEvent("CheckedChangeEvent")] 18 public
partial class UCRadioButton : UserControl 19 { 20 [Description("选中改变事件"),
Category("自定义")] 21 public event EventHandler CheckedChangeEvent; 22 23
private Font _Font = new Font("微软雅黑", 12); 24 [Description("字体"), Category("自定义
")] 25 public new Font Font 26 { 27 get { return _Font; } 28 set 29 { 30
_Font = value; 31 label1.Font = value; 32 } 33 } 34 35 private Color
_ForeColor = Color.FromArgb(62, 62, 62); 36 [Description("字体颜色"), Category("自定义
")] 37 public new Color ForeColor 38 { 39 get { return _ForeColor; } 40 set
41 { 42 label1.ForeColor = value; 43 _ForeColor = value; 44 } 45 } 46
private string _Text = "单选按钮"; 47 [Description("文本"), Category("自定义")] 48
public string TextValue 49 { 50 get { return _Text; } 51 set 52 { 53
label1.Text = value; 54 _Text = value; 55 } 56 } 57 private bool _checked
=false; 58 [Description("是否选中"), Category("自定义")] 59 public bool Checked 60
{ 61 get 62 { 63 return _checked; 64 } 65 set 66 { 67 if (_checked !=
value) 68 { 69 _checked = value; 70 if (base.Enabled) 71 { 72 if
(_checked) 73 { 74 panel1.BackgroundImage = Properties.Resources.radioButton1;
75 } 76 else 77 { 78 panel1.BackgroundImage =
Properties.Resources.radioButton0; 79 } 80 } 81 else 82 { 83 if
(_checked) 84 { 85 panel1.BackgroundImage =
Properties.Resources.radioButton10; 86 } 87 else 88 { 89
panel1.BackgroundImage = Properties.Resources.radioButton00; 90 } 91 } 92
SetCheck(value); 93 94 if (CheckedChangeEvent != null) 95 { 96
CheckedChangeEvent(this, null); 97 } 98 } 99 } 100 } 101 102 private
string _groupName; 103 104 [Description("分组名称"), Category("自定义")] 105 public
string GroupName 106 { 107 get { return _groupName; } 108 set { _groupName =
value; }109 } 110 111 public new bool Enabled 112 { 113 get 114 { 115 return
base.Enabled; 116 } 117 set 118 { 119 base.Enabled = value; 120 if (value) 121
{122 if (_checked) 123 { 124 panel1.BackgroundImage =
Properties.Resources.radioButton1;125 } 126 else 127 { 128
panel1.BackgroundImage = Properties.Resources.radioButton0; 129 } 130 } 131
else 132 { 133 if (_checked) 134 { 135 panel1.BackgroundImage =
Properties.Resources.radioButton10;136 } 137 else 138 { 139
panel1.BackgroundImage = Properties.Resources.radioButton00; 140 } 141 } 142
}143 } 144 public UCRadioButton() 145 { 146 InitializeComponent(); 147 } 148
149 private void SetCheck(bool bln) 150 { 151 if (!bln) 152 return; 153 if (
this.Parent != null) 154 { 155 foreach (Control c in this.Parent.Controls) 156
{157 if (c is UCRadioButton && c != this) 158 { 159 UCRadioButton uc =
(UCRadioButton)c;160 if (_groupName == uc.GroupName && uc.Checked) 161 { 162
uc.Checked =false; 163 return; 164 } 165 } 166 } 167 } 168 } 169 170
private void Radio_MouseDown(object sender, MouseEventArgs e) 171 { 172 this
.Checked =true; 173 } 174 175 private void UCRadioButton_Load(object sender,
EventArgs e)176 { 177 if (this.Parent != null && this._checked) 178 { 179
foreach (Control c in this.Parent.Controls) 180 { 181 if (c is UCRadioButton
&& c !=this) 182 { 183 UCRadioButton uc = (UCRadioButton)c; 184 if (_groupName
== uc.GroupName && uc.Checked) 185 { 186 Checked = false; 187 return; 188 }
189 } 190 } 191 } 192 } 193 } 194 } View Code 1 namespace
HZH_Controls.Controls 2 { 3 partial class UCRadioButton 4 { 5 /// <summary>
6 /// 必需的设计器变量。 7 /// </summary> 8 private System.ComponentModel.IContainer
components =null; 9 10 /// <summary> 11 /// 清理所有正在使用的资源。 12 /// </summary> 13
/// <param name="disposing">如果应释放托管资源，为 true；否则为 false。</param> 14 protected
override void Dispose(bool disposing) 15 { 16 if (disposing && (components !=
null)) 17 { 18 components.Dispose(); 19 } 20 base.Dispose(disposing); 21 }
22 23 #region 组件设计器生成的代码 24 25 /// <summary> 26 /// 设计器支持所需的方法 - 不要 27 ///
使用代码编辑器修改此方法的内容。28 /// </summary> 29 private void InitializeComponent() 30 { 31
this.label1 = new System.Windows.Forms.Label(); 32 this.panel1 = new
System.Windows.Forms.Panel();33 this.SuspendLayout(); 34 // 35 // label1 36 //
37 this.label1.Dock = System.Windows.Forms.DockStyle.Fill; 38 this.label1.Font =
new System.Drawing.Font("微软雅黑", 12F); 39 this.label1.ForeColor =
System.Drawing.Color.FromArgb(((int)(((byte)(62)))), ((int)(((byte)(62)))), ((
int)(((byte)(62))))); 40 this.label1.Location = new System.Drawing.Point(18, 0);
41 this.label1.Name = "label1"; 42 this.label1.Padding = new
System.Windows.Forms.Padding(5, 0, 0, 0); 43 this.label1.Size = new
System.Drawing.Size(215, 30); 44 this.label1.TabIndex = 3; 45 this.label1.Text =
"单选按钮"; 46 this.label1.TextAlign = System.Drawing.ContentAlignment.MiddleLeft;
47 this.label1.MouseDown += new System.Windows.Forms.MouseEventHandler(this
.Radio_MouseDown);48 // 49 // panel1 50 // 51 this.panel1.BackgroundImage =
global::HZH_Controls.Properties.Resources.radioButton0; 52 this
.panel1.BackgroundImageLayout = System.Windows.Forms.ImageLayout.Zoom; 53 this
.panel1.Dock = System.Windows.Forms.DockStyle.Left; 54 this.panel1.Location =
new System.Drawing.Point(0, 0); 55 this.panel1.Name = "panel1"; 56 this
.panel1.Size =new System.Drawing.Size(18, 30); 57 this.panel1.TabIndex = 2; 58
this.panel1.MouseDown += new System.Windows.Forms.MouseEventHandler(this
.Radio_MouseDown);59 // 60 // UCRadioButton 61 // 62 this.AutoScaleMode =
System.Windows.Forms.AutoScaleMode.None;63 this.Controls.Add(this.label1); 64
this.Controls.Add(this.panel1); 65 this.Name = "UCRadioButton"; 66 this.Size =
new System.Drawing.Size(233, 30); 67 this.Load += new System.EventHandler(this
.UCRadioButton_Load);68 this.MouseDown += new
System.Windows.Forms.MouseEventHandler(this.Radio_MouseDown); 69 this
.ResumeLayout(false); 70 71 } 72 73 #endregion 74 75 private
System.Windows.Forms.Label label1;76 private System.Windows.Forms.Panel panel1;
77 } 78 } View Code
用处及效果

用处：就是单选框

效果：



 

最后的话

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