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
如果觉得写的还行，请点个 star 支持一下吧
来都来了，点个【推荐】再走吧，谢谢
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 // <copyright file="UCSplitLabel.cs"> 7 // Copyright by Huang Zhenghui(黄正辉) All, QQ group:568015492 QQ:623128629 Email:[email protected] 8 // </copyright> 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 /// <summary> 27 /// Class UCSplitLabel. 28 /// Implements the <see cref="System.Windows.Forms.Label" /> 29 /// </summary> 30 /// <seealso cref="System.Windows.Forms.Label" /> 31 public class UCSplitLabel : Label 32 { 33 /// <summary> 34 /// Gets or sets the text. 35 /// </summary> 36 /// <value>The text.</value> 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 /// <summary> 51 /// 获取或设置控件显示的文字的字体。 52 /// </summary> 53 /// <value>The font.</value> 54 /// <PermissionSet> 55 /// <IPermission class="System.Security.Permissions.EnvironmentPermission, mscorlib, Version=2.0.3600.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" version="1" Unrestricted="true" /> 56 /// <IPermission class="System.Security.Permissions.FileIOPermission, mscorlib, Version=2.0.3600.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" version="1" Unrestricted="true" /> 57 /// <IPermission class="System.Security.Permissions.SecurityPermission, mscorlib, Version=2.0.3600.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" version="1" Flags="UnmanagedCode, ControlEvidence" /> 58 /// <IPermission class="System.Diagnostics.PerformanceCounterPermission, System, Version=2.0.3600.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" version="1" Unrestricted="true" /> 59 /// </PermissionSet> 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 /// <summary> 74 /// 获取或设置大小，该大小是 <see cref="M:System.Windows.Forms.Control.GetPreferredSize(System.Drawing.Size)" /> 可以指定的下限。 75 /// </summary> 76 /// <value>The minimum size.</value> 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 /// <summary> 93 /// 获取或设置大小，该大小是 <see cref="M:System.Windows.Forms.Control.GetPreferredSize(System.Drawing.Size)" /> 可以指定的上限。 94 /// </summary> 95 /// <value>The maximum size.</value> 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 /// <summary> 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 /// </summary> 112 /// <value><c>true</c> if [automatic size]; otherwise, <c>false</c>.</value> 113 /// <PermissionSet> 114 /// <IPermission class="System.Security.Permissions.EnvironmentPermission, mscorlib, Version=2.0.3600.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" version="1" Unrestricted="true" /> 115 /// <IPermission class="System.Security.Permissions.FileIOPermission, mscorlib, Version=2.0.3600.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" version="1" Unrestricted="true" /> 116 /// <IPermission class="System.Security.Permissions.SecurityPermission, mscorlib, Version=2.0.3600.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" version="1" Flags="UnmanagedCode, ControlEvidence" /> 117 /// <IPermission class="System.Diagnostics.PerformanceCounterPermission, System, Version=2.0.3600.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" version="1" Unrestricted="true" /> 118 /// </PermissionSet> 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 /// <summary> 134 /// The line color 135 /// </summary> 136 private Color lineColor = LineColors.Light; 137 138 /// <summary> 139 /// Gets or sets the color of the line. 140 /// </summary> 141 /// <value>The color of the line.</value> 142 public Color LineColor 143 { 144 get { return lineColor; } 145 set 146 { 147 lineColor = value; 148 Invalidate(); 149 } 150 } 151 152 /// <summary> 153 /// Resets the maximum size. 154 /// </summary> 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 /// <summary> 169 /// Initializes a new instance of the <see cref="UCSplitLabel"/> class. 170 /// </summary> 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 /// <summary> 187 /// Handles the PaddingChanged event of the UCSplitLabel control. 188 /// </summary> 189 /// <param name="sender">The source of the event.</param> 190 /// <param name="e">The <see cref="EventArgs"/> instance containing the event data.</param> 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 /// <summary> 200 /// Handles the <see cref="E:Paint" /> event. 201 /// </summary> 202 /// <param name="e">包含事件数据的 <see cref="T:System.Windows.Forms.PaintEventArgs" />。</param> 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
如果你喜欢的话，请到 https://gitee.com/kwwwvagaa/net_winform_custom_control 点个星星吧