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

终于到文本框了，文本框将包含原文本框扩展，透明文本框，数字输入文本框，带边框文本框

本文将讲解数字输入文本框，可以通过加减按钮来改变数字

用到了无焦点窗体和键盘，如果你还没有了解，请前往查看

（十九）c#Winform自定义控件-停靠窗体

（十五）c#Winform自定义控件-键盘（二）

开始

添加用户控件，命名UCNumTextBox

有这些属性

 1  [Description("弹出输入键盘时发生"), Category("自定义")]
 2         public event EventHandler ShowKeyBorderEvent;
 3         [Description("关闭输入键盘时发生"), Category("自定义")]
 4         public event EventHandler HideKeyBorderEvent;
 5         [Description("数字改变时发生"), Category("自定义")]
 6         public event EventHandler NumChanged;
 7         /// <summary>
 8         /// 输入类型
 9         /// </summary>
10         [Description("输入类型"), Category("自定义")]
11         public TextInputType InputType
12         {
13             get
14             {
15                 return txtNum.InputType;
16             }
17             set
18             {
19                 if (value == TextInputType.NotControl)
20                 {
21                     return;
22                 }
23                 txtNum.InputType = value;
24             }
25         }
26 
27         [Description("数字是否可手动编辑"), Category("自定义")]
28         public bool IsNumCanInput
29         {
30             get
31             {
32                 return txtNum.Enabled;
33             }
34             set
35             {
36                 txtNum.Enabled = value;
37             }
38         }
39         /// <summary>
40         /// 当InputType为数字类型时，能输入的最大值
41         /// </summary>
42         [Description("当InputType为数字类型时，能输入的最大值。")]
43         public decimal MaxValue
44         {
45             get
46             {
47                 return this.txtNum.MaxValue;
48             }
49             set
50             {
51                 this.txtNum.MaxValue = value;
52             }
53         }
54         /// <summary>
55         /// 当InputType为数字类型时，能输入的最小值
56         /// </summary>
57         [Description("当InputType为数字类型时，能输入的最小值。")]
58         public decimal MinValue
59         {
60             get
61             {
62                 return this.txtNum.MinValue;
63             }
64             set
65             {
66                 this.txtNum.MinValue = value;
67             }
68         }
69         private KeyBoardType keyBoardType = KeyBoardType.UCKeyBorderNum;
70         [Description("键盘样式"), Category("自定义")]
71         public KeyBoardType KeyBoardType
72         {
73             get { return keyBoardType; }
74             set { keyBoardType = value; }
75         }
76 
77         [Description("数值"), Category("自定义")]
78         public decimal Num
79         {
80             get { return txtNum.Text.ToDecimal(); }
81             set { txtNum.Text = value.ToString(); }
82         }
83         [Description("字体"), Category("自定义")]
84         public new Font Font
85         {
86             get
87             {
88                 return txtNum.Font;
89             }
90             set
91             {
92                 txtNum.Font = value;
93             }
94         }
95 
96         [Description("增加按钮点击事件"), Category("自定义")]
97         public event EventHandler AddClick;
98         [Description("减少按钮点击事件"), Category("自定义")]
99         public event EventHandler MinusClick;

一些事件

  1  void txtNum_TextChanged(object sender, EventArgs e)
  2         {
  3             if (NumChanged != null)
  4             {
  5                 NumChanged(txtNum.Text.ToString(), e);
  6             }
  7         }
  8         Forms.FrmAnchor m_frmAnchor;
  9         private void txtNum_MouseDown(object sender, MouseEventArgs e)
 10         {
 11             if (IsNumCanInput)
 12             {
 13                 if (KeyBoardType != HZH_Controls.Controls.KeyBoardType.Null)
 14                 {
 15                     switch (keyBoardType)
 16                     {
 17                         case KeyBoardType.UCKeyBorderAll_EN:
 18 
 19                             UCKeyBorderAll keyAll = new UCKeyBorderAll();
 20                             keyAll.RetractClike += (a, b) => { m_frmAnchor.Hide(); };
 21                             keyAll.EnterClick += (a, b) => { m_frmAnchor.Hide(); };
 22                             m_frmAnchor = new Forms.FrmAnchor(this, keyAll);
 23                             m_frmAnchor.VisibleChanged += m_frmAnchor_VisibleChanged;
 24 
 25                             m_frmAnchor.Show(this.FindForm());
 26                             break;
 27                         case KeyBoardType.UCKeyBorderNum:
 28 
 29                             UCKeyBorderNum keyNum = new UCKeyBorderNum();
 30                             keyNum.EnterClick += (a, b) => { m_frmAnchor.Hide(); };
 31                             m_frmAnchor = new Forms.FrmAnchor(this, keyNum);
 32                             m_frmAnchor.VisibleChanged += m_frmAnchor_VisibleChanged;
 33                             m_frmAnchor.Show(this.FindForm());
 34                             break;
 35                     }
 36                 }
 37             }
 38         }
 39 
 40         void m_frmAnchor_VisibleChanged(object sender, EventArgs e)
 41         {
 42             if (m_frmAnchor.Visible)
 43             {
 44                 if (ShowKeyBorderEvent != null)
 45                 {
 46                     ShowKeyBorderEvent(this, null);
 47                 }
 48             }
 49             else
 50             {
 51                 if (HideKeyBorderEvent != null)
 52                 {
 53                     HideKeyBorderEvent(this, null);
 54                 }
 55             }
 56         }
 57 
 58         public void NumAddClick()
 59         {
 60             btnAdd_MouseDown(null, null);
 61         }
 62 
 63         public void NumMinusClick()
 64         {
 65             btnMinus_MouseDown(null, null);
 66         }
 67 
 68         private void btnAdd_MouseDown(object sender, MouseEventArgs e)
 69         {
 70             if (AddClick != null)
 71             {
 72                 AddClick(this, e);
 73             }
 74             decimal dec = this.txtNum.Text.ToDecimal();
 75             dec++;
 76             txtNum.Text = dec.ToString();
 77 
 78         }
 79 
 80         private void btnMinus_MouseDown(object sender, MouseEventArgs e)
 81         {
 82             if (MinusClick != null)
 83             {
 84                 MinusClick(this, e);
 85             }
 86             decimal dec = this.txtNum.Text.ToDecimal();
 87             dec--;
 88             txtNum.Text = dec.ToString();
 89         }
 90 
 91         private void UCNumTextBox_Load(object sender, EventArgs e)
 92         {
 93             this.txtNum.BackColor = this.BackColor;
 94         }
 95 
 96         private void txtNum_FontChanged(object sender, EventArgs e)
 97         {
 98             txtNum.Location = new Point(txtNum.Location.X, (this.Height - txtNum.Height) / 2);
 99         }
100 
101         private void UCNumTextBox_BackColorChanged(object sender, EventArgs e)
102         {
103             Color c = this.BackColor;
104             Control control = this;
105             while (c == Color.Transparent)
106             {
107                 control = control.Parent;
108                 if (control == null)
109                     break;
110                 c = control.BackColor;
111             }
112             if (c == Color.Transparent)
113                 return;
114             txtNum.BackColor = c;
115         }

完整代码

  1 // 版权所有  黄正辉  交流群：568015492   QQ：623128629
  2 // 文件名称：UCNumTextBox.cs
  3 // 创建日期：2019-08-15 16:03:54
  4 // 功能描述：TextBox
  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("NumChanged")]
 18     public partial class UCNumTextBox : UserControl
 19     {
 20         [Description("弹出输入键盘时发生"), Category("自定义")]
 21         public event EventHandler ShowKeyBorderEvent;
 22         [Description("关闭输入键盘时发生"), Category("自定义")]
 23         public event EventHandler HideKeyBorderEvent;
 24         [Description("数字改变时发生"), Category("自定义")]
 25         public event EventHandler NumChanged;
 26         /// <summary>
 27         /// 输入类型
 28         /// </summary>
 29         [Description("输入类型"), Category("自定义")]
 30         public TextInputType InputType
 31         {
 32             get
 33             {
 34                 return txtNum.InputType;
 35             }
 36             set
 37             {
 38                 if (value == TextInputType.NotControl)
 39                 {
 40                     return;
 41                 }
 42                 txtNum.InputType = value;
 43             }
 44         }
 45 
 46         [Description("数字是否可手动编辑"), Category("自定义")]
 47         public bool IsNumCanInput
 48         {
 49             get
 50             {
 51                 return txtNum.Enabled;
 52             }
 53             set
 54             {
 55                 txtNum.Enabled = value;
 56             }
 57         }
 58         /// <summary>
 59         /// 当InputType为数字类型时，能输入的最大值
 60         /// </summary>
 61         [Description("当InputType为数字类型时，能输入的最大值。")]
 62         public decimal MaxValue
 63         {
 64             get
 65             {
 66                 return this.txtNum.MaxValue;
 67             }
 68             set
 69             {
 70                 this.txtNum.MaxValue = value;
 71             }
 72         }
 73         /// <summary>
 74         /// 当InputType为数字类型时，能输入的最小值
 75         /// </summary>
 76         [Description("当InputType为数字类型时，能输入的最小值。")]
 77         public decimal MinValue
 78         {
 79             get
 80             {
 81                 return this.txtNum.MinValue;
 82             }
 83             set
 84             {
 85                 this.txtNum.MinValue = value;
 86             }
 87         }
 88         private KeyBoardType keyBoardType = KeyBoardType.UCKeyBorderNum;
 89         [Description("键盘样式"), Category("自定义")]
 90         public KeyBoardType KeyBoardType
 91         {
 92             get { return keyBoardType; }
 93             set { keyBoardType = value; }
 94         }
 95 
 96         [Description("数值"), Category("自定义")]
 97         public decimal Num
 98         {
 99             get { return txtNum.Text.ToDecimal(); }
100             set { txtNum.Text = value.ToString(); }
101         }
102         [Description("字体"), Category("自定义")]
103         public new Font Font
104         {
105             get
106             {
107                 return txtNum.Font;
108             }
109             set
110             {
111                 txtNum.Font = value;
112             }
113         }
114 
115         [Description("增加按钮点击事件"), Category("自定义")]
116         public event EventHandler AddClick;
117         [Description("减少按钮点击事件"), Category("自定义")]
118         public event EventHandler MinusClick;
119         public UCNumTextBox()
120         {
121             InitializeComponent();
122             txtNum.TextChanged += txtNum_TextChanged;
123         }
124 
125         void txtNum_TextChanged(object sender, EventArgs e)
126         {
127             if (NumChanged != null)
128             {
129                 NumChanged(txtNum.Text.ToString(), e);
130             }
131         }
132         Forms.FrmAnchor m_frmAnchor;
133         private void txtNum_MouseDown(object sender, MouseEventArgs e)
134         {
135             if (IsNumCanInput)
136             {
137                 if (KeyBoardType != HZH_Controls.Controls.KeyBoardType.Null)
138                 {
139                     switch (keyBoardType)
140                     {
141                         case KeyBoardType.UCKeyBorderAll_EN:
142 
143                             UCKeyBorderAll keyAll = new UCKeyBorderAll();
144                             keyAll.RetractClike += (a, b) => { m_frmAnchor.Hide(); };
145                             keyAll.EnterClick += (a, b) => { m_frmAnchor.Hide(); };
146                             m_frmAnchor = new Forms.FrmAnchor(this, keyAll);
147                             m_frmAnchor.VisibleChanged += m_frmAnchor_VisibleChanged;
148 
149                             m_frmAnchor.Show(this.FindForm());
150                             break;
151                         case KeyBoardType.UCKeyBorderNum:
152 
153                             UCKeyBorderNum keyNum = new UCKeyBorderNum();
154                             keyNum.EnterClick += (a, b) => { m_frmAnchor.Hide(); };
155                             m_frmAnchor = new Forms.FrmAnchor(this, keyNum);
156                             m_frmAnchor.VisibleChanged += m_frmAnchor_VisibleChanged;
157                             m_frmAnchor.Show(this.FindForm());
158                             break;
159                     }
160                 }
161             }
162         }
163 
164         void m_frmAnchor_VisibleChanged(object sender, EventArgs e)
165         {
166             if (m_frmAnchor.Visible)
167             {
168                 if (ShowKeyBorderEvent != null)
169                 {
170                     ShowKeyBorderEvent(this, null);
171                 }
172             }
173             else
174             {
175                 if (HideKeyBorderEvent != null)
176                 {
177                     HideKeyBorderEvent(this, null);
178                 }
179             }
180         }
181 
182         public void NumAddClick()
183         {
184             btnAdd_MouseDown(null, null);
185         }
186 
187         public void NumMinusClick()
188         {
189             btnMinus_MouseDown(null, null);
190         }
191 
192         private void btnAdd_MouseDown(object sender, MouseEventArgs e)
193         {
194             if (AddClick != null)
195             {
196                 AddClick(this, e);
197             }
198             decimal dec = this.txtNum.Text.ToDecimal();
199             dec++;
200             txtNum.Text = dec.ToString();
201 
202         }
203 
204         private void btnMinus_MouseDown(object sender, MouseEventArgs e)
205         {
206             if (MinusClick != null)
207             {
208                 MinusClick(this, e);
209             }
210             decimal dec = this.txtNum.Text.ToDecimal();
211             dec--;
212             txtNum.Text = dec.ToString();
213         }
214 
215         private void UCNumTextBox_Load(object sender, EventArgs e)
216         {
217             this.txtNum.BackColor = this.BackColor;
218         }
219 
220         private void txtNum_FontChanged(object sender, EventArgs e)
221         {
222             txtNum.Location = new Point(txtNum.Location.X, (this.Height - txtNum.Height) / 2);
223         }
224 
225         private void UCNumTextBox_BackColorChanged(object sender, EventArgs e)
226         {
227             Color c = this.BackColor;
228             Control control = this;
229             while (c == Color.Transparent)
230             {
231                 control = control.Parent;
232                 if (control == null)
233                     break;
234                 c = control.BackColor;
235             }
236             if (c == Color.Transparent)
237                 return;
238             txtNum.BackColor = c;
239         }
240     }
241 }

View Code

  1 namespace HZH_Controls.Controls
  2 {
  3     partial class UCNumTextBox
  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.txtNum = new HZH_Controls.Controls.TextBoxEx();
 32             this.btnMinus = new System.Windows.Forms.Panel();
 33             this.btnAdd = new System.Windows.Forms.Panel();
 34             this.SuspendLayout();
 35             // 
 36             // txtNum
 37             // 
 38             this.txtNum.Anchor = ((System.Windows.Forms.AnchorStyles)((System.Windows.Forms.AnchorStyles.Left | System.Windows.Forms.AnchorStyles.Right)));
 39             this.txtNum.BackColor = System.Drawing.Color.FromArgb(((int)(((byte)(247)))), ((int)(((byte)(247)))), ((int)(((byte)(247)))));
 40             this.txtNum.BorderStyle = System.Windows.Forms.BorderStyle.None;
 41             this.txtNum.DecLength = 3;
 42             this.txtNum.Font = new System.Drawing.Font("Arial Unicode MS", 15F);
 43             this.txtNum.InputType = TextInputType.Number;
 44             this.txtNum.Location = new System.Drawing.Point(37, 11);
 45             this.txtNum.Margin = new System.Windows.Forms.Padding(0);
 46             this.txtNum.MaxValue = new decimal(new int[] {
 47             1000000,
 48             0,
 49             0,
 50             0});
 51             this.txtNum.MinValue = new decimal(new int[] {
 52             0,
 53             0,
 54             0,
 55             0});
 56             this.txtNum.MyRectangle = new System.Drawing.Rectangle(0, 0, 0, 0);
 57             this.txtNum.Name = "txtNum";
 58             this.txtNum.OldText = null;
 59             this.txtNum.PromptColor = System.Drawing.Color.Gray;
 60             this.txtNum.PromptFont = new System.Drawing.Font("微软雅黑", 15F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Pixel);
 61             this.txtNum.PromptText = "";
 62             this.txtNum.RegexPattern = "";
 63             this.txtNum.Size = new System.Drawing.Size(78, 27);
 64             this.txtNum.TabIndex = 9;
 65             this.txtNum.Text = "1";
 66             this.txtNum.TextAlign = System.Windows.Forms.HorizontalAlignment.Center;
 67             this.txtNum.FontChanged += new System.EventHandler(this.txtNum_FontChanged);
 68             this.txtNum.MouseDown += new System.Windows.Forms.MouseEventHandler(this.txtNum_MouseDown);
 69             // 
 70             // btnMinus
 71             // 
 72             this.btnMinus.BackColor = System.Drawing.Color.Transparent;
 73             this.btnMinus.BackgroundImage = global::HZH_Controls.Properties.Resources.ic_remove_black_18dp;
 74             this.btnMinus.BackgroundImageLayout = System.Windows.Forms.ImageLayout.Center;
 75             this.btnMinus.Dock = System.Windows.Forms.DockStyle.Left;
 76             this.btnMinus.Location = new System.Drawing.Point(2, 2);
 77             this.btnMinus.Name = "btnMinus";
 78             this.btnMinus.Size = new System.Drawing.Size(32, 40);
 79             this.btnMinus.TabIndex = 6;
 80             this.btnMinus.MouseDown += new System.Windows.Forms.MouseEventHandler(this.btnMinus_MouseDown);
 81             // 
 82             // btnAdd
 83             // 
 84             this.btnAdd.BackColor = System.Drawing.Color.Transparent;
 85             this.btnAdd.BackgroundImage = global::HZH_Controls.Properties.Resources.ic_add_black_18dp;
 86             this.btnAdd.BackgroundImageLayout = System.Windows.Forms.ImageLayout.Center;
 87             this.btnAdd.Dock = System.Windows.Forms.DockStyle.Right;
 88             this.btnAdd.Location = new System.Drawing.Point(118, 2);
 89             this.btnAdd.Name = "btnAdd";
 90             this.btnAdd.Size = new System.Drawing.Size(32, 40);
 91             this.btnAdd.TabIndex = 5;
 92             this.btnAdd.MouseDown += new System.Windows.Forms.MouseEventHandler(this.btnAdd_MouseDown);
 93             // 
 94             // UCNumTextBox
 95             // 
 96             this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.None;
 97             this.Controls.Add(this.txtNum);
 98             this.Controls.Add(this.btnMinus);
 99             this.Controls.Add(this.btnAdd);
100             this.Name = "UCNumTextBox";
101             this.Padding = new System.Windows.Forms.Padding(2);
102             this.Size = new System.Drawing.Size(152, 44);
103             this.Load += new System.EventHandler(this.UCNumTextBox_Load);
104             this.BackColorChanged += new System.EventHandler(this.UCNumTextBox_BackColorChanged);
105             this.ResumeLayout(false);
106             this.PerformLayout();
107 
108         }
109 
110         #endregion
111 
112         private System.Windows.Forms.Panel btnAdd;
113         private System.Windows.Forms.Panel btnMinus;
114         private TextBoxEx txtNum;
115     }
116 }

View Code

设计效果

 

用处及效果

 

最后的话

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