vb.net 窗体接收键盘事件_（十五）C#WinFrom自定义控件系列-键盘（二）

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。

本系列文章将讲解各种控件的开发及思路，欢迎各位批评指正。

此系列控件开发教程将全部在原生控件基础上进行重绘开发，目标的扁平化、漂亮、支持触屏。

如果有什么好的建议也可以评论留言来交流。

源码地址：

GitHub：https：//github.com/kwwwvagaa/NetWinformControl

码云：https://gitee.com/kwwwvagaa/net_winform_custom_control.git

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

键盘控件目前分为4中，英文键盘，数字键盘，支付键盘，手写键盘

键盘一般用在到文本框弹出的键盘，那么为什么到现在还没有看到文本框的影子呢？因为文本框的某些功能牵扯到了自定义窗体，所以准备在自定义窗体介绍之后再来说文本框。

本篇文章介绍数字键盘和支付键盘，手写键盘将在后面文本框控件介绍是提及到，此处不单独介绍

开始

首先来说数字键盘

添加用户控件，命名UCKeyBorderNum

全部功能代码如下，没有太多东西

 1  private bool useCustomEvent = false; 2         ///  3         /// 是否使用自定义的事件来接收按键，当为true时将不再向系统发送按键请求 4         ///  5         [Description("是否使用自定义的事件来接收按键，当为true时将不再向系统发送按键请求"), Category("自定义")] 6         public bool UseCustomEvent 7         { 8             get { return useCustomEvent; } 9             set { useCustomEvent = value; }10         }11         [Description("数字点击事件"), Category("自定义")]12         public event EventHandler NumClick;13         [Description("删除点击事件"), Category("自定义")]14         public event EventHandler BackspaceClick;15         [Description("回车点击事件"), Category("自定义")]16         public event EventHandler EnterClick;17         public UCKeyBorderNum()18         {19             InitializeComponent();20         }21 22         private void Num_MouseDown(object sender, MouseEventArgs e)23         {24             if (NumClick != null)25             {26                 NumClick(sender, e);27             }28             if (useCustomEvent)29                 return;30             Label lbl = sender as Label;31             SendKeys.Send(lbl.Tag.ToString());32         }33 34         private void Backspace_MouseDown(object sender, MouseEventArgs e)35         {36             if (BackspaceClick != null)37             {38                 BackspaceClick(sender, e);39             }40             if (useCustomEvent)41                 return;42             Label lbl = sender as Label;43             SendKeys.Send("{BACKSPACE}");44         }45 46         private void Enter_MouseDown(object sender, MouseEventArgs e)47         {48             if (EnterClick != null)49             {50                 EnterClick(sender, e);51             }52             if (useCustomEvent)53                 return;54             SendKeys.Send("{ENTER}");55         }

计效果

下面说支付键盘，这个可能就比较小众的键盘了，支持根据输入金额自动计算可能付款金额

添加用户控件，命名UCKeyBorderPay

同样的东西不多，主要的就一个计算预估付款金额

  1  [Description("数字点击事件"), Category("自定义")]  2         public event EventHandler NumClick;  3   4         [Description("取消点击事件"), Category("自定义")]  5         public event EventHandler CancelClick;  6   7         [Description("确定点击事件"), Category("自定义")]  8         public event EventHandler OKClick;  9  10         [Description("删除点击事件"), Category("自定义")] 11         public event EventHandler BackspaceClick; 12  13         [Description("金额点击事件"), Category("自定义")] 14         public event EventHandler MoneyClick; 15         public UCKeyBorderPay() 16         { 17             InitializeComponent(); 18         } 19  20         #region 设置快速付款金额 21         ///  22         /// 功能描述:设置快速付款金额 23         /// 作　　者:HZH 24         /// 创建日期:2019-03-07 11:41:04 25         /// 任务编号:POS 26         ///  27         /// SorceMoney 28         public void SetPayMoney(decimal SorceMoney) 29         { 30             List list = new List(); 31             decimal d = Math.Ceiling(SorceMoney); 32             if (SorceMoney > 0m) 33             { 34                 if (SorceMoney < 5m) 35                 { 36                     list.Add(5m); 37                     list.Add(10m); 38                     list.Add(20m); 39                     list.Add(50m); 40                 } 41                 else if (SorceMoney < 10m) 42                 { 43                     list.Add(10m); 44                     list.Add(20m); 45                     list.Add(50m); 46                     list.Add(100m); 47                 } 48                 else 49                 { 50                     int num = Convert.ToInt32(d % 10m); 51                     int num2 = Convert.ToInt32(Math.Floor(d / 10m) % 10m); 52                     int num3 = Convert.ToInt32(Math.Floor(d / 100m)); 53                     int num4; 54                     if (num < 5) 55                     { 56                         num4 = num2 * 10 + 5; 57                         list.Add(num4 + num3 * 100); 58                         num4 = (num2 + 1) * 10; 59                         list.Add(num4 + num3 * 100); 60                     } 61                     else 62                     { 63                         num4 = (num2 + 1) * 10; 64                         list.Add(num4 + num3 * 100); 65                     } 66                     if (num4 >= 0 && num4 < 10) 67                     { 68                         num4 = 10; 69                         if (list.Count < 4) 70                         { 71                             list.Add(num4 + num3 * 100); 72                         } 73                         num4 = 20; 74                         if (list.Count < 4) 75                         { 76                             list.Add(num4 + num3 * 100); 77                         } 78                         num4 = 50; 79                         if (list.Count < 4) 80                         { 81                             list.Add(num4 + num3 * 100); 82                         } 83                         num4 = 100; 84                         if (list.Count < 4) 85                         { 86                             list.Add(num4 + num3 * 100); 87                         } 88                     } 89                     else if (num4 >= 10 && num4 < 20) 90                     { 91                         num4 = 20; 92                         if (list.Count < 4) 93                         { 94                             list.Add(num4 + num3 * 100); 95                         } 96                         num4 = 50; 97                         if (list.Count < 4) 98                         { 99                             list.Add(num4 + num3 * 100);100                         }101                         num4 = 100;102                         if (list.Count < 4)103                         {104                             list.Add(num4 + num3 * 100);105                         }106                     }107                     else if (num4 >= 20 && num4 < 50)108                     {109                         num4 = 50;110                         if (list.Count < 4)111                         {112                             list.Add(num4 + num3 * 100);113                         }114                         num4 = 100;115                         if (list.Count < 4)116                         {117                             list.Add(num4 + num3 * 100);118                         }119                     }120                     else if (num4 < 100)121                     {122                         num4 = 100;123                         if (list.Count < 4)124                         {125                             list.Add(num4 + num3 * 100);126                         }127                     }128                 }129             }130             SetFastMoneyToContrl(list);131         }132         #endregion133 134         private void SetFastMoneyToContrl(List values)135         {136             List lbl = new List() { lblFast1, lblFast2, lblFast3, lblFast4 };137             lblFast1.Tag = lblFast1.Text = "";138             lblFast2.Tag = lblFast2.Text = "";139             lblFast3.Tag = lblFast3.Text = "";140             lblFast4.Tag = lblFast4.Text = "";141             for (int i = 0; i < lbl.Count && i < values.Count; i++)142             {143                 if (values[i].ToString("0.##").Length < 4)144                 {145                     lbl[i].Font = new System.Drawing.Font("Arial Unicode MS", 30F);146                 }147                 else148                 {149                     Graphics graphics = lbl[i].CreateGraphics();150                     for (int j = 0; j < 5; j++)151                     {152                         SizeF sizeF = graphics.MeasureString(values[i].ToString("0.##"), new System.Drawing.Font("Arial Unicode MS", 30 - j * 5), 100, StringFormat.GenericTypographic);153                         if (sizeF.Width <= lbl[i].Width - 20)154                         {155                             lbl[i].Font = new System.Drawing.Font("Arial Unicode MS", 30 - j * 5);156                             break;157                         }158                     }159                     graphics.Dispose();160                 }161                 lbl[i].Tag = lbl[i].Text = values[i].ToString("0.##");162             }163         }164         private void Num_MouseDown(object sender, MouseEventArgs e)165         {166             if (NumClick != null)167                 NumClick((sender as Label).Tag, e);168         }169 170         private void Backspace_MouseDown(object sender, MouseEventArgs e)171         {172             if (BackspaceClick != null)173                 BackspaceClick((sender as Label).Tag, e);174         }175 176         private void Cancel_MouseDown(object sender, MouseEventArgs e)177         {178             if (CancelClick != null)179                 CancelClick((sender as Label).Tag, e);180         }181 182         private void OK_MouseDown(object sender, MouseEventArgs e)183         {184             if (OKClick != null)185                 OKClick((sender as Label).Tag, e);186         }187 188         private void Money_MouseDown(object sender, MouseEventArgs e)189         {190             if (MoneyClick != null)191                 MoneyClick((sender as Label).Tag, e);192         }193 194         public void Money1Click()195         {196             Money_MouseDown(lblFast1, null);197         }198 199         public void Money2Click()200         {201             Money_MouseDown(lblFast2, null);202         }203 204         public void Money3Click()205         {206             Money_MouseDown(lblFast3, null);207         }208 209         public void Money4Click()210         {211             Money_MouseDown(lblFast4, null);212         }

计效果