（四）c#Winform自定义控件-选择按钮组

2022-09-27 14:46:23

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

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

准备工作

该控件是由多个按钮组合形成的，类似多选框和单选框，需要用到前面我们说到的控件UCBtnExt ，如果你对UCBtnExt 还不了解，请移步

（二）c#Winform自定义控件-按钮查看

我们先理一下思路，我们需要显示多个按钮，支持多选和单选，具有选中效果

开始

我们先看下有哪些属性

 1  /// <summary>
 2         /// 选中改变事件
 3         /// </summary>
 4         public event EventHandler SelectedItemChanged;
 5         private Dictionary<string, string> m_dataSource = new Dictionary<string, string>();
 6         /// <summary>
 7         /// 数据源
 8         /// </summary>
 9         public Dictionary<string, string> DataSource
10         {
11             get { return m_dataSource; }
12             set
13             {
14                 m_dataSource = value;
15                 Reload();
16             }
17         }
18 
19         private List<string> m_selectItem = new List<string>();
20         /// <summary>
21         /// 选中项
22         /// </summary>
23         public List<string> SelectItem
24         {
25             get { return m_selectItem; }
26             set
27             {
28                 m_selectItem = value;
29                 if (m_selectItem == null)
30                     m_selectItem = new List<string>();
31                 SetSelected();
32             }
33         }
34 
35         private bool m_isMultiple = false;
36         /// <summary>
37         /// 是否多选
38         /// </summary>
39         public bool IsMultiple
40         {
41             get { return m_isMultiple; }
42             set { m_isMultiple = value; }
43         }

当数据源改变的时候，需要加载按钮到面板上

 1  private void Reload()
 2         {
 3             try
 4             {
 5                 ControlHelper.FreezeControl(flowLayoutPanel1, true);
 6                 this.flowLayoutPanel1.Controls.Clear();
 7                 if (DataSource != null)
 8                 {
 9                     foreach (var item in DataSource)
10                     {
11                         UCBtnExt btn = new UCBtnExt();
12                         btn.BackColor = System.Drawing.Color.Transparent;
13                         btn.BtnBackColor = System.Drawing.Color.White;
14                         btn.BtnFont = new System.Drawing.Font("微软雅黑", 10F);
15                         btn.BtnForeColor = System.Drawing.Color.Gray;
16                         btn.BtnText = item.Value;
17                         btn.ConerRadius = 5;
18                         btn.Cursor = System.Windows.Forms.Cursors.Hand;
19                         btn.FillColor = System.Drawing.Color.White;
20                         btn.Font = new System.Drawing.Font("微软雅黑", 15F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Pixel);
21                         btn.IsRadius = true;
22                         btn.IsShowRect = true;
23                         btn.IsShowTips = false;
24                         btn.Location = new System.Drawing.Point(5, 5);
25                         btn.Margin = new System.Windows.Forms.Padding(5);
26                         btn.Name = item.Key;
27                         btn.RectColor = System.Drawing.Color.FromArgb(224, 224, 224);
28                         btn.RectWidth = 1;
29                         btn.Size = new System.Drawing.Size(72, 38);
30                         btn.TabStop = false;
31                         btn.BtnClick += btn_BtnClick;
32                         this.flowLayoutPanel1.Controls.Add(btn);
33                     }
34                 }
35             }
36             finally
37             {
38                 ControlHelper.FreezeControl(flowLayoutPanel1, false);
39             }
40             SetSelected();
41         }
42 
43         void btn_BtnClick(object sender, EventArgs e)
44         {
45             var btn = sender as UCBtnExt;
46             if (m_selectItem.Contains(btn.Name))
47             {
48                 btn.RectColor = System.Drawing.Color.FromArgb(224, 224, 224);
49                 m_selectItem.Remove(btn.Name);
50             }
51             else
52             {
53                 if (!m_isMultiple)
54                 {
55                     foreach (var item in m_selectItem)
56                     {
57                         var lst = this.flowLayoutPanel1.Controls.Find(item, false);
58                         if (lst.Length == 1)
59                         {
60                             var _btn = lst[0] as UCBtnExt;
61                             _btn.RectColor = System.Drawing.Color.FromArgb(224, 224, 224);
62                         }
63                     }
64                     m_selectItem.Clear();
65                 }
66                 btn.RectColor = System.Drawing.Color.FromArgb(255, 77, 59);
67                 m_selectItem.Add(btn.Name);
68             }
69             if (SelectedItemChanged != null)
70                 SelectedItemChanged(this, e);
71         }

如果设置了初始选中项，那么还需要在加载后选中

 1    private void SetSelected()
 2         {
 3             if (m_selectItem != null && m_selectItem.Count > 0 && DataSource != null && DataSource.Count > 0)
 4             {
 5                 try
 6                 {
 7                     ControlHelper.FreezeControl(flowLayoutPanel1, true);
 8                     if (m_isMultiple)
 9                     {
10                         foreach (var item in m_selectItem)
11                         {
12                             var lst = this.flowLayoutPanel1.Controls.Find(item, false);
13                             if (lst.Length == 1)
14                             {
15                                 var btn = lst[0] as UCBtnExt;
16                                 btn.RectColor = System.Drawing.Color.FromArgb(255, 77, 59);
17                             }
18                         }
19                     }
20                     else
21                     {
22                         UCBtnExt btn = null;
23                         foreach (var item in m_selectItem)
24                         {
25                             var lst = this.flowLayoutPanel1.Controls.Find(item, false);
26                             if (lst.Length == 1)
27                             {
28                                 btn = lst[0] as UCBtnExt;
29                                 break;
30                             }
31                         }
32                         if (btn != null)
33                         {
34                             m_selectItem = new List<string>() { btn.Name };
35                             btn.RectColor = System.Drawing.Color.FromArgb(255, 77, 59);
36                         }
37                     }
38                 }
39                 finally
40                 {
41                     ControlHelper.FreezeControl(flowLayoutPanel1, false);
42                 }
43             }
44         }

至此所有的逻辑已经处理完成，下面看下完整的代码吧

  1 // 版权所有  黄正辉  交流群：568015492   QQ：623128629
  2 // 文件名称：UCBtnsGroup.cs
  3 // 创建日期：2019-08-15 15:58:13
  4 // 功能描述：按钮组
  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     public partial class UCBtnsGroup : UserControl
 18     {
 19         /// <summary>
 20         /// 选中改变事件
 21         /// </summary>
 22         public event EventHandler SelectedItemChanged;
 23         private Dictionary<string, string> m_dataSource = new Dictionary<string, string>();
 24         /// <summary>
 25         /// 数据源
 26         /// </summary>
 27         public Dictionary<string, string> DataSource
 28         {
 29             get { return m_dataSource; }
 30             set
 31             {
 32                 m_dataSource = value;
 33                 Reload();
 34             }
 35         }
 36 
 37         private List<string> m_selectItem = new List<string>();
 38         /// <summary>
 39         /// 选中项
 40         /// </summary>
 41         public List<string> SelectItem
 42         {
 43             get { return m_selectItem; }
 44             set
 45             {
 46                 m_selectItem = value;
 47                 if (m_selectItem == null)
 48                     m_selectItem = new List<string>();
 49                 SetSelected();
 50             }
 51         }
 52 
 53         private bool m_isMultiple = false;
 54         /// <summary>
 55         /// 是否多选
 56         /// </summary>
 57         public bool IsMultiple
 58         {
 59             get { return m_isMultiple; }
 60             set { m_isMultiple = value; }
 61         }
 62         public UCBtnsGroup()
 63         {
 64             InitializeComponent();
 65         }
 66 
 67         private void Reload()
 68         {
 69             try
 70             {
 71                 ControlHelper.FreezeControl(flowLayoutPanel1, true);
 72                 this.flowLayoutPanel1.Controls.Clear();
 73                 if (DataSource != null)
 74                 {
 75                     foreach (var item in DataSource)
 76                     {
 77                         UCBtnExt btn = new UCBtnExt();
 78                         btn.BackColor = System.Drawing.Color.Transparent;
 79                         btn.BtnBackColor = System.Drawing.Color.White;
 80                         btn.BtnFont = new System.Drawing.Font("微软雅黑", 10F);
 81                         btn.BtnForeColor = System.Drawing.Color.Gray;
 82                         btn.BtnText = item.Value;
 83                         btn.ConerRadius = 5;
 84                         btn.Cursor = System.Windows.Forms.Cursors.Hand;
 85                         btn.FillColor = System.Drawing.Color.White;
 86                         btn.Font = new System.Drawing.Font("微软雅黑", 15F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Pixel);
 87                         btn.IsRadius = true;
 88                         btn.IsShowRect = true;
 89                         btn.IsShowTips = false;
 90                         btn.Location = new System.Drawing.Point(5, 5);
 91                         btn.Margin = new System.Windows.Forms.Padding(5);
 92                         btn.Name = item.Key;
 93                         btn.RectColor = System.Drawing.Color.FromArgb(224, 224, 224);
 94                         btn.RectWidth = 1;
 95                         btn.Size = new System.Drawing.Size(72, 38);
 96                         btn.TabStop = false;
 97                         btn.BtnClick += btn_BtnClick;
 98                         this.flowLayoutPanel1.Controls.Add(btn);
 99                     }
100                 }
101             }
102             finally
103             {
104                 ControlHelper.FreezeControl(flowLayoutPanel1, false);
105             }
106             SetSelected();
107         }
108 
109         void btn_BtnClick(object sender, EventArgs e)
110         {
111             var btn = sender as UCBtnExt;
112             if (m_selectItem.Contains(btn.Name))
113             {
114                 btn.RectColor = System.Drawing.Color.FromArgb(224, 224, 224);
115                 m_selectItem.Remove(btn.Name);
116             }
117             else
118             {
119                 if (!m_isMultiple)
120                 {
121                     foreach (var item in m_selectItem)
122                     {
123                         var lst = this.flowLayoutPanel1.Controls.Find(item, false);
124                         if (lst.Length == 1)
125                         {
126                             var _btn = lst[0] as UCBtnExt;
127                             _btn.RectColor = System.Drawing.Color.FromArgb(224, 224, 224);
128                         }
129                     }
130                     m_selectItem.Clear();
131                 }
132                 btn.RectColor = System.Drawing.Color.FromArgb(255, 77, 59);
133                 m_selectItem.Add(btn.Name);
134             }
135             if (SelectedItemChanged != null)
136                 SelectedItemChanged(this, e);
137         }
138 
139         private void SetSelected()
140         {
141             if (m_selectItem != null && m_selectItem.Count > 0 && DataSource != null && DataSource.Count > 0)
142             {
143                 try
144                 {
145                     ControlHelper.FreezeControl(flowLayoutPanel1, true);
146                     if (m_isMultiple)
147                     {
148                         foreach (var item in m_selectItem)
149                         {
150                             var lst = this.flowLayoutPanel1.Controls.Find(item, false);
151                             if (lst.Length == 1)
152                             {
153                                 var btn = lst[0] as UCBtnExt;
154                                 btn.RectColor = System.Drawing.Color.FromArgb(255, 77, 59);
155                             }
156                         }
157                     }
158                     else
159                     {
160                         UCBtnExt btn = null;
161                         foreach (var item in m_selectItem)
162                         {
163                             var lst = this.flowLayoutPanel1.Controls.Find(item, false);
164                             if (lst.Length == 1)
165                             {
166                                 btn = lst[0] as UCBtnExt;
167                                 break;
168                             }
169                         }
170                         if (btn != null)
171                         {
172                             m_selectItem = new List<string>() { btn.Name };
173                             btn.RectColor = System.Drawing.Color.FromArgb(255, 77, 59);
174                         }
175                     }
176                 }
177                 finally
178                 {
179                     ControlHelper.FreezeControl(flowLayoutPanel1, false);
180                 }
181             }
182         }
183     }
184 }

View Code

 1 namespace HZH_Controls.Controls
 2 {
 3     partial class UCBtnsGroup
 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.flowLayoutPanel1 = new System.Windows.Forms.FlowLayoutPanel();
32             this.SuspendLayout();
33             // 
34             // flowLayoutPanel1
35             // 
36             this.flowLayoutPanel1.Dock = System.Windows.Forms.DockStyle.Fill;
37             this.flowLayoutPanel1.Location = new System.Drawing.Point(0, 0);
38             this.flowLayoutPanel1.Name = "flowLayoutPanel1";
39             this.flowLayoutPanel1.Size = new System.Drawing.Size(420, 50);
40             this.flowLayoutPanel1.TabIndex = 0;
41             // 
42             // UCBtnsGroup
43             // 
44             this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.None;
45             this.BackColor = System.Drawing.Color.White;
46             this.Controls.Add(this.flowLayoutPanel1);
47             this.MinimumSize = new System.Drawing.Size(0, 50);
48             this.Name = "UCBtnsGroup";
49             this.Size = new System.Drawing.Size(420, 50);
50             this.ResumeLayout(false);
51 
52         }
53 
54         #endregion
55 
56         private System.Windows.Forms.FlowLayoutPanel flowLayoutPanel1;
57     }
58 }

View Code

用处及效果

用处：可以用选择按钮组来替换单选框和复选框，具有更和谐的界面效果

效果：

最后的话

如果你喜欢的话，请到 https://gitee.com/kwwwvagaa/net_winform_custom_control 点个星星吧

（四）c#Winform自定义控件-选择按钮组

码农公寓

前提

准备工作

开始

用处及效果

最后的话

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