（八十）c#Winform自定义控件-分割线标签-HZHControls
官网
http://www.hzhcontrols.com
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：https://github.com/kwwwvagaa/NetWinformControl
码云：https://gitee.com/kwwwvagaa/net_winform_custom_control.git
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NuGet
Install-Package HZH_Controls
目录
https://www.cnblogs.com/bfyx/p/11364884.html
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 get 100 { 101 return base.MaximumSize; 102 } 103 set 104 { 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 AutoSize 121 { 122 get 123 { 124 return base.AutoSize; 125 } 126 set 127 { 128 base.AutoSize = value; 129 } 130 } 131 132 133 /// 134 /// The line color 135 /// 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 LineColor 143 { 144 get { return lineColor; } 145 set 146 { 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 }
最后的话
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