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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。

GitHub：

码云：

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

来都来了，点个【推荐】再走吧，谢谢

NuGet

Install-Package HZH_Controls

用处及效果

准备工作

这个比较简单，对label扩展，重绘划线即可

开始

添加一个类UCSplitLabel ，继承 Label

代码比较少

1 // ***********************************************************************  2 // Assembly         : HZH_Controls  3 // Created          : 2019-10-09  4 //  5 // ***********************************************************************  6 // 
    
       7 //     Copyright by Huang Zhenghui(黄正辉) All, QQ group:568015492 QQ:623128629 Email:623128629@qq.com  8 // 
      9 // 10 // Blog: https://www.cnblogs.com/bfyx 11 // GitHub：https://github.com/kwwwvagaa/NetWinformControl 12 // gitee：https://gitee.com/kwwwvagaa/net_winform_custom_control.git 13 // 14 // If you use this code, please keep this note. 15 // *********************************************************************** 16 using System; 17 using System.Collections.Generic; 18 using System.Linq; 19 using System.Text; 20 using System.Windows.Forms; 21 using System.Drawing; 22 using System.ComponentModel; 23  24 namespace HZH_Controls.Controls 25 { 26     ///  27     /// Class UCSplitLabel. 28     /// Implements the 
      29     /// 
 30     /// 
     31     public class UCSplitLabel : Label 32     { 33         ///  34         /// Gets or sets the text. 35         /// 
 36         /// 
    
     The text.
     37         [Localizable(true)] 38         public override string Text 39         { 40             get 41             { 42                 return base.Text; 43             } 44             set 45             { 46                 base.Text = value; 47                 ResetMaxSize(); 48             } 49         } 50         ///  51         /// 获取或设置控件显示的文字的字体。 52         /// 
 53         /// 
    
     The font.
     54         /// 
    
      55         ///   
      56         ///   
      57         ///   
      58         ///   
      59         /// 
     60         [Localizable(true)] 61         public override Font Font 62         { 63             get 64             { 65                 return base.Font; 66             } 67             set 68             { 69                 base.Font = value; 70                 ResetMaxSize(); 71             } 72         } 73         ///  74         /// 获取或设置大小，该大小是 
      可以指定的下限。 75         /// 
 76         /// 
    
     The minimum size.
     77         [Localizable(true)] 78         public override Size MinimumSize 79         { 80             get 81             { 82                 return base.MinimumSize; 83             } 84             set 85             { 86                 base.MinimumSize = value; 87                 ResetMaxSize(); 88             } 89         } 90  91  92         ///  93         /// 获取或设置大小，该大小是 
      可以指定的上限。 94         /// 
 95         /// 
    
     The maximum size.
     96         [Localizable(true)] 97         public override Size MaximumSize 98         { 99             get100             {101                 return base.MaximumSize;102             }103             set104             {105                 base.MaximumSize = value;106                 ResetMaxSize();107             }108         }109         /// 110         /// 获取或设置一个值，该值指示是否自动调整控件的大小以完整显示其内容。111         /// 
112         /// 
    
     
      true
      if [automatic size]; otherwise, 
     
      false
     .
    113         /// 
    
     114         ///   
     115         ///   
     116         ///   
     117         ///   
     118         /// 
    119         [EditorBrowsable(EditorBrowsableState.Never), Browsable(false)]120         public override bool AutoSize121         {122             get123             {124                 return base.AutoSize;125             }126             set127             {128                 base.AutoSize = value;129             }130         }131 132 133         /// 134         /// The line color135         /// 
136         private Color lineColor = LineColors.Light;137 138         /// 139         /// Gets or sets the color of the line.140         /// 
141         /// 
    
     The color of the line.
    142         public Color LineColor143         {144             get { return lineColor; }145             set146             {147                 lineColor = value;148                 Invalidate();149             }150         }151 152         /// 153         /// Resets the maximum size.154         /// 
155         private void ResetMaxSize()156         {157             using (var g = this.CreateGraphics())158             {159                 var _width = Width;160                 var size = g.MeasureString(string.IsNullOrEmpty(Text) ? "A" : Text, Font);161                 if (MinimumSize.Height != (int)size.Height)162                     MinimumSize = new Size(base.MinimumSize.Width, (int)size.Height);163                 if (MaximumSize.Height != (int)size.Height)164                     MaximumSize = new Size(base.MaximumSize.Width, (int)size.Height);165                 this.Width = _width;166             }167         }168         /// 169         /// Initializes a new instance of the 
      class.170         /// 
171         public UCSplitLabel()172             : base()173         {174             if (ControlHelper.IsDesignMode())175             {176                 Text = "分割线";177                 Font = new Font("微软雅黑", 8f);178             }179             this.AutoSize = false;180             Padding = new Padding(20, 0, 0, 0);181             MinimumSize = new System.Drawing.Size(150, 10);182             PaddingChanged += UCSplitLabel_PaddingChanged;183             this.Width = 200;184         }185 186         /// 187         /// Handles the PaddingChanged event of the UCSplitLabel control.188         /// 
189         /// The source of the event.190         /// The 
     instance containing the event data.191         void UCSplitLabel_PaddingChanged(object sender, EventArgs e)192         {193             if (Padding.Left < 20)194             {195                 Padding = new Padding(20, Padding.Top, Padding.Right, Padding.Bottom);196             }197         }198 199         /// 200         /// Handles the 
      event.201         /// 
202         /// 包含事件数据的 
    。203         protected override void OnPaint(PaintEventArgs e)204         {205             base.OnPaint(e);206             var g = e.Graphics;207             g.SetGDIHigh();208 209             var size = g.MeasureString(Text, Font);210             g.DrawLine(new Pen(new SolidBrush(lineColor)), new PointF(1, Padding.Top + (this.Height - Padding.Top - Padding.Bottom) / 2), new PointF(Padding.Left - 2, Padding.Top + (this.Height - Padding.Top - Padding.Bottom) / 2));211             g.DrawLine(new Pen(new SolidBrush(lineColor)), new PointF(Padding.Left + size.Width + 1, Padding.Top + (this.Height - Padding.Top - Padding.Bottom) / 2), new PointF(Width - Padding.Right, Padding.Top + (this.Height - Padding.Top - Padding.Bottom) / 2));212 213         }214     }215 }