（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

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 

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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

 // ***********************************************************************
 // Assembly         : HZH_Controls
 // Created          : 2019-10-09
 //
 // ***********************************************************************
 // <copyright file="UCSplitLabel.cs">
 //     Copyright by Huang Zhenghui(黄正辉) All, QQ group:568015492 QQ:623128629 Email:623128629@qq.com
 // </copyright>
 //
 // Blog: https://www.cnblogs.com/bfyx
 // GitHub：https://github.com/kwwwvagaa/NetWinformControl
 // gitee：https://gitee.com/kwwwvagaa/net_winform_custom_control.git
 //
 // If you use this code, please keep this note.
 // ***********************************************************************
 using System;
 using System.Collections.Generic;
 using System.Linq;
 using System.Text;
 using System.Windows.Forms;
 using System.Drawing;
 using System.ComponentModel;

 namespace HZH_Controls.Controls
 {
     /// <summary>
     /// Class UCSplitLabel.
     /// Implements the <see cref="System.Windows.Forms.Label" />
     /// </summary>
     /// <seealso cref="System.Windows.Forms.Label" />
     public class UCSplitLabel : Label
     {
         /// <summary>
         /// Gets or sets the text.
         /// </summary>
         /// <value>The text.</value>
         [Localizable(true)]
         public override string Text
         {
             get
             {
                 return base.Text;
             }
             set
             {
                 base.Text = value;
                 ResetMaxSize();
             }
         }
         /// <summary>
         /// 获取或设置控件显示的文字的字体。
         /// </summary>
         /// <value>The font.</value>
         /// <PermissionSet>
         ///   <IPermission class="System.Security.Permissions.EnvironmentPermission, mscorlib, Version=2.0.3600.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" version="1" Unrestricted="true" />
         ///   <IPermission class="System.Security.Permissions.FileIOPermission, mscorlib, Version=2.0.3600.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" version="1" Unrestricted="true" />
         ///   <IPermission class="System.Security.Permissions.SecurityPermission, mscorlib, Version=2.0.3600.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" version="1" Flags="UnmanagedCode, ControlEvidence" />
         ///   <IPermission class="System.Diagnostics.PerformanceCounterPermission, System, Version=2.0.3600.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" version="1" Unrestricted="true" />
         /// </PermissionSet>
         [Localizable(true)]
         public override Font Font
         {
             get
             {
                 return base.Font;
             }
             set
             {
                 base.Font = value;
                 ResetMaxSize();
             }
         }
         /// <summary>
         /// 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。
         /// </summary>
         /// <value>The minimum size.</value>
         [Localizable(true)]
         public override Size MinimumSize
         {
             get
             {
                 return base.MinimumSize;
             }
             set
             {
                 base.MinimumSize = value;
                 ResetMaxSize();
             }
         }

         /// <summary>
         /// 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。
         /// </summary>
         /// <value>The maximum size.</value>
         [Localizable(true)]
         public override Size MaximumSize
         {
             get
             {
                 return base.MaximumSize;
             }
             set
             {
                 base.MaximumSize = value;
                 ResetMaxSize();
             }
         }
         /// <summary>
         /// 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。
         /// </summary>
         /// <value><c>true</c> if [automatic size]; otherwise, <c>false</c>.</value>
         /// <PermissionSet>
         ///   <IPermission class="System.Security.Permissions.EnvironmentPermission, mscorlib, Version=2.0.3600.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" version="1" Unrestricted="true" />
         ///   <IPermission class="System.Security.Permissions.FileIOPermission, mscorlib, Version=2.0.3600.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" version="1" Unrestricted="true" />
         ///   <IPermission class="System.Security.Permissions.SecurityPermission, mscorlib, Version=2.0.3600.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" version="1" Flags="UnmanagedCode, ControlEvidence" />
         ///   <IPermission class="System.Diagnostics.PerformanceCounterPermission, System, Version=2.0.3600.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" version="1" Unrestricted="true" />
         /// </PermissionSet>
         [EditorBrowsable(EditorBrowsableState.Never), Browsable(false)]
         public override bool AutoSize
         {
             get
             {
                 return base.AutoSize;
             }
             set
             {
                 base.AutoSize = value;
             }
         }

         /// <summary>
         /// The line color
         /// </summary>
         private Color lineColor = LineColors.Light;

         /// <summary>
         /// Gets or sets the color of the line.
         /// </summary>
         /// <value>The color of the line.</value>
         public Color LineColor
         {
             get { return lineColor; }
             set
             {
                 lineColor = value;
                 Invalidate();
             }
         }

         /// <summary>
         /// Resets the maximum size.
         /// </summary>
         private void ResetMaxSize()
         {
             using (var g = this.CreateGraphics())
             {
                 var _width = Width;
                 var size = g.MeasureString(string.IsNullOrEmpty(Text) ? "A" : Text, Font);
                 if (MinimumSize.Height != (int)size.Height)
                     MinimumSize = new Size(base.MinimumSize.Width, (int)size.Height);
                 if (MaximumSize.Height != (int)size.Height)
                     MaximumSize = new Size(base.MaximumSize.Width, (int)size.Height);
                 this.Width = _width;
             }
         }
         /// <summary>
         /// Initializes a new instance of the <see cref="UCSplitLabel"/> class.
         /// </summary>
         public UCSplitLabel()
             : base()
         {
             if (ControlHelper.IsDesignMode())
             {
                 Text = "分割线";
                 Font = new Font("微软雅黑", 8f);
             }
             this.AutoSize = false;
             Padding = new Padding(, , , );
             MinimumSize = new System.Drawing.Size(, );
             PaddingChanged += UCSplitLabel_PaddingChanged;
             this.Width = ;
         }

         /// <summary>
         /// Handles the PaddingChanged event of the UCSplitLabel control.
         /// </summary>
         /// <param name="sender">The source of the event.</param>
         /// <param name="e">The <see cref="EventArgs"/> instance containing the event data.</param>
         void UCSplitLabel_PaddingChanged(object sender, EventArgs e)
         {
             if (Padding.Left < )
             {
                 Padding = new Padding(, Padding.Top, Padding.Right, Padding.Bottom);
             }
         }

         /// <summary>
         /// Handles the <see cref="E:Paint" /> event.
         /// </summary>
         /// <param name="e">包含事件数据的 <see cref="T:System.Windows.Forms.PaintEventArgs" />。</param>
         protected override void OnPaint(PaintEventArgs e)
         {
             base.OnPaint(e);
             var g = e.Graphics;
             g.SetGDIHigh();

             var size = g.MeasureString(Text, Font);
             g.DrawLine(new Pen(new SolidBrush(lineColor)), new PointF(, Padding.Top + (this.Height - Padding.Top - Padding.Bottom) / ), new PointF(Padding.Left - , Padding.Top + (this.Height - Padding.Top - Padding.Bottom) / ));
             g.DrawLine(new Pen(new SolidBrush(lineColor)), new PointF(Padding.Left + size.Width + , Padding.Top + (this.Height - Padding.Top - Padding.Bottom) / ), new PointF(Width - Padding.Right, Padding.Top + (this.Height - Padding.Top - Padding.Bottom) / ));

         }
     }
 }

最后的话

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