Install-Package HZH_Controls

 // ***********************************************************************

 // 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) / ));

         }

     }

 }