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

麻烦博客下方点个【推荐】，谢谢

NuGet

Install-Package HZH_Controls

用处及效果

准备工作

依然是GDI+ 不了解请先百度一下

开始

添加一个类UCBottle，继承UserControl

添加几个控制属性

 //瓶身区域

         /// <summary>

         /// The m working rect

         /// </summary>

         Rectangle m_workingRect;

         /// <summary>

         /// The title

         /// </summary>

         string title = "瓶子1";

         /// <summary>

         /// Gets or sets the title.

         /// </summary>

         /// <value>The title.</value>

         [Description("标题"), Category("自定义")]

         public string Title

         {

             get { return title; }

             set

             {

                 title = value;

                 ResetWorkingRect();

                 Refresh();

             }

         }

         /// <summary>

         /// The bottle color

         /// </summary>

         private Color bottleColor = Color.FromArgb(, , );

         /// <summary>

         /// Gets or sets the color of the bottle.

         /// </summary>

         /// <value>The color of the bottle.</value>

         [Description("瓶子颜色"), Category("自定义")]

         public Color BottleColor

         {

             get { return bottleColor; }

             set

             {

                 bottleColor = value;

                 Refresh();

             }

         }

         /// <summary>

         /// The bottle mouth color

         /// </summary>

         private Color bottleMouthColor = Color.FromArgb(, , );

         /// <summary>

         /// Gets or sets the color of the bottle mouth.

         /// </summary>

         /// <value>The color of the bottle mouth.</value>

         [Description("瓶口颜色"), Category("自定义")]

         public Color BottleMouthColor

         {

             get { return bottleMouthColor; }

             set { bottleMouthColor = value; }

         }

         /// <summary>

         /// The liquid color

         /// </summary>

         private Color liquidColor = Color.FromArgb(, , );

         /// <summary>

         /// Gets or sets the color of the liquid.

         /// </summary>

         /// <value>The color of the liquid.</value>

         [Description("液体颜色"), Category("自定义")]

         public Color LiquidColor

         {

             get { return liquidColor; }

             set

             {

                 liquidColor = value;

                 Refresh();

             }

         }

         /// <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>

         [Description("文字字体"), Category("自定义")]

         public override Font Font

         {

             get

             {

                 return base.Font;

             }

             set

             {

                 base.Font = value;

                 ResetWorkingRect();

                 Refresh();

             }

         }

         /// <summary>

         /// 获取或设置控件的前景色。

         /// </summary>

         /// <value>The color of the fore.</value>

         /// <PermissionSet>

         ///   <IPermission class="System.Security.Permissions.FileIOPermission, mscorlib, Version=2.0.3600.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" version="1" Unrestricted="true" />

         /// </PermissionSet>

         [Description("文字颜色"), Category("自定义")]

         public override System.Drawing.Color ForeColor

         {

             get

             {

                 return base.ForeColor;

             }

             set

             {

                 base.ForeColor = value;

                 Refresh();

             }

         }

         /// <summary>

         /// The maximum value

         /// </summary>

         private decimal maxValue = ;

         /// <summary>

         /// Gets or sets the maximum value.

         /// </summary>

         /// <value>The maximum value.</value>

         [Description("最大值"), Category("自定义")]

         public decimal MaxValue

         {

             get { return maxValue; }

             set

             {

                 if (value < m_value)

                     return;

                 maxValue = value;

                 Refresh();

             }

         }

         /// <summary>

         /// The m value

         /// </summary>

         private decimal m_value = ;

         /// <summary>

         /// Gets or sets the value.

         /// </summary>

         /// <value>The value.</value>

         [Description("值"), Category("自定义")]

         public decimal Value

         {

             get { return m_value; }

             set

             {

                 if (value <=  || value > maxValue)

                     return;

                 m_value = value;

                 Refresh();

             }

         }

         /// <summary>

         /// The m no

         /// </summary>

         private string m_NO;

         /// <summary>

         /// Gets or sets the NO.

         /// </summary>

         /// <value>The no.</value>

         [Description("编号"), Category("自定义")]

         public string NO

         {

             get { return m_NO; }

             set

             {

                 m_NO = value;

                 Refresh();

             }

         }

重绘

  protected override void OnPaint(PaintEventArgs e)

         {

             base.OnPaint(e);

             var g = e.Graphics;

             g.SetGDIHigh();

             //写文字

             var size = g.MeasureString(title, Font);

             g.DrawString(title, Font, new SolidBrush(ForeColor), new PointF((this.Width - size.Width) / , ));

             //画空瓶子

             GraphicsPath pathPS = new GraphicsPath();

             Point[] psPS = new Point[]

             {

                 new Point(m_workingRect.Left, m_workingRect.Top),

                 new Point(m_workingRect.Right - , m_workingRect.Top),

                 new Point(m_workingRect.Right - , m_workingRect.Bottom - ),

                 new Point(m_workingRect.Right -  - m_workingRect.Width / , m_workingRect.Bottom),

                 new Point(m_workingRect.Left + m_workingRect.Width / , m_workingRect.Bottom),

                 new Point(m_workingRect.Left, m_workingRect.Bottom - ),

             };

             pathPS.AddLines(psPS);

             pathPS.CloseAllFigures();

             g.FillPath(new SolidBrush(bottleColor), pathPS);

             //画液体

             decimal decYTHeight = (m_value / maxValue) * m_workingRect.Height;

             GraphicsPath pathYT = new GraphicsPath();

             Rectangle rectYT = Rectangle.Empty;

             if (decYTHeight < )

             {

                 PointF[] psYT = new PointF[]

                 {

                     new PointF((float)(m_workingRect.Left+(-decYTHeight))+,(float)(m_workingRect.Bottom-decYTHeight)),

                     new PointF((float)(m_workingRect.Right-(-decYTHeight))-,(float)(m_workingRect.Bottom-decYTHeight)),

                     new PointF(m_workingRect.Right--m_workingRect.Width/, m_workingRect.Bottom),

                     new PointF(m_workingRect.Left+m_workingRect.Width/, m_workingRect.Bottom),

                 };

                 pathYT.AddLines(psYT);

                 pathYT.CloseAllFigures();

                 rectYT = new Rectangle((m_workingRect.Left + ( - (int)decYTHeight)) + , m_workingRect.Bottom - (int)decYTHeight - , m_workingRect.Width - (int)( - decYTHeight) *  - , );

             }

             else

             {

                 PointF[] psYT = new PointF[]

                 {

                     new PointF(m_workingRect.Left,(float)(m_workingRect.Bottom-decYTHeight)),

                     new PointF(m_workingRect.Right-,(float)(m_workingRect.Bottom-decYTHeight)),

                     new PointF(m_workingRect.Right-,m_workingRect.Bottom-),

                     new PointF(m_workingRect.Right--m_workingRect.Width/, m_workingRect.Bottom),

                     new PointF(m_workingRect.Left+m_workingRect.Width/, m_workingRect.Bottom),

                     new PointF(m_workingRect.Left,m_workingRect.Bottom-),

                 };

                 pathYT.AddLines(psYT);

                 pathYT.CloseAllFigures();

                 rectYT = new Rectangle(m_workingRect.Left, m_workingRect.Bottom - (int)decYTHeight - , m_workingRect.Width, );

             }

             g.FillPath(new SolidBrush(liquidColor), pathYT);

             g.FillPath(new SolidBrush(Color.FromArgb(, bottleMouthColor)), pathYT);

             //画液体面

             g.FillEllipse(new SolidBrush(liquidColor), rectYT);

             g.FillEllipse(new SolidBrush(Color.FromArgb(, Color.White)), rectYT);

             //画高亮

             int intCount = m_workingRect.Width /  / ;

             int intSplit = ( - ) / intCount;

             for (int i = ; i < intCount; i++)

             {

                 int _penWidth = m_workingRect.Width /  -  * i;

                 if (_penWidth <= )

                     _penWidth = ;

                 g.DrawLine(new Pen(new SolidBrush(Color.FromArgb(, Color.White)), _penWidth), new Point(m_workingRect.Width / , m_workingRect.Top), new Point(m_workingRect.Width / , m_workingRect.Bottom - ));

                 if (_penWidth == )

                     break;

             }

             //画瓶底

             g.FillEllipse(new SolidBrush(bottleColor), new RectangleF(m_workingRect.Left, m_workingRect.Top - , m_workingRect.Width - , ));

             g.FillEllipse(new SolidBrush(Color.FromArgb(, Color.White)), new RectangleF(m_workingRect.Left, m_workingRect.Top - , m_workingRect.Width - , ));

             //画瓶口

             g.FillRectangle(new SolidBrush(bottleMouthColor), new Rectangle(m_workingRect.Left + m_workingRect.Width / , m_workingRect.Bottom, m_workingRect.Width / , ));

             //画瓶颈阴影

             GraphicsPath pathPJ = new GraphicsPath();

             Point[] psPJ = new Point[]

             {

                 new Point(m_workingRect.Left, m_workingRect.Bottom-),

                 new Point(m_workingRect.Right-, m_workingRect.Bottom-),

                 new Point(m_workingRect.Right--m_workingRect.Width/, m_workingRect.Bottom),

                 new Point(m_workingRect.Left+m_workingRect.Width/, m_workingRect.Bottom)

             };

             pathPJ.AddLines(psPJ);

             pathPJ.CloseAllFigures();

             g.FillPath(new SolidBrush(Color.FromArgb(, bottleMouthColor)), pathPJ);

             //写编号

             if (!string.IsNullOrEmpty(m_NO))

             {

                 var nosize = g.MeasureString(m_NO, Font);

                 g.DrawString(m_NO, Font, new SolidBrush(ForeColor), new PointF((this.Width - nosize.Width) / , m_workingRect.Top + ));

             }

         }

代码就这么多

完整代码

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

 // Assembly         : HZH_Controls

 // Created          : 2019-09-05

 //

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

 // <copyright file="UCBottle.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.Drawing.Drawing2D;

 using System.ComponentModel;

 namespace HZH_Controls.Controls

 {

     /// <summary>

     /// Class UCBottle.

     /// Implements the <see cref="System.Windows.Forms.UserControl" />

     /// </summary>

     /// <seealso cref="System.Windows.Forms.UserControl" />

     public class UCBottle : UserControl

     {

         //瓶身区域

         /// <summary>

         /// The m working rect

         /// </summary>

         Rectangle m_workingRect;

         /// <summary>

         /// The title

         /// </summary>

         string title = "瓶子1";

         /// <summary>

         /// Gets or sets the title.

         /// </summary>

         /// <value>The title.</value>

         [Description("标题"), Category("自定义")]

         public string Title

         {

             get { return title; }

             set

             {

                 title = value;

                 ResetWorkingRect();

                 Refresh();

             }

         }

         /// <summary>

         /// The bottle color

         /// </summary>

         private Color bottleColor = Color.FromArgb(, , );

         /// <summary>

         /// Gets or sets the color of the bottle.

         /// </summary>

         /// <value>The color of the bottle.</value>

         [Description("瓶子颜色"), Category("自定义")]

         public Color BottleColor

         {

             get { return bottleColor; }

             set

             {

                 bottleColor = value;

                 Refresh();

             }

         }

         /// <summary>

         /// The bottle mouth color

         /// </summary>

         private Color bottleMouthColor = Color.FromArgb(, , );

         /// <summary>

         /// Gets or sets the color of the bottle mouth.

         /// </summary>

         /// <value>The color of the bottle mouth.</value>

         [Description("瓶口颜色"), Category("自定义")]

         public Color BottleMouthColor

         {

             get { return bottleMouthColor; }

             set { bottleMouthColor = value; }

         }

         /// <summary>

         /// The liquid color

         /// </summary>

         private Color liquidColor = Color.FromArgb(, , );

         /// <summary>

         /// Gets or sets the color of the liquid.

         /// </summary>

         /// <value>The color of the liquid.</value>

         [Description("液体颜色"), Category("自定义")]

         public Color LiquidColor

         {

             get { return liquidColor; }

             set

             {

                 liquidColor = value;

                 Refresh();

             }

         }

         /// <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>

         [Description("文字字体"), Category("自定义")]

         public override Font Font

         {

             get

             {

                 return base.Font;

             }

             set

             {

                 base.Font = value;

                 ResetWorkingRect();

                 Refresh();

             }

         }

         /// <summary>

         /// 获取或设置控件的前景色。

         /// </summary>

         /// <value>The color of the fore.</value>

         /// <PermissionSet>

         ///   <IPermission class="System.Security.Permissions.FileIOPermission, mscorlib, Version=2.0.3600.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" version="1" Unrestricted="true" />

         /// </PermissionSet>

         [Description("文字颜色"), Category("自定义")]

         public override System.Drawing.Color ForeColor

         {

             get

             {

                 return base.ForeColor;

             }

             set

             {

                 base.ForeColor = value;

                 Refresh();

             }

         }

         /// <summary>

         /// The maximum value

         /// </summary>

         private decimal maxValue = ;

         /// <summary>

         /// Gets or sets the maximum value.

         /// </summary>

         /// <value>The maximum value.</value>

         [Description("最大值"), Category("自定义")]

         public decimal MaxValue

         {

             get { return maxValue; }

             set

             {

                 if (value < m_value)

                     return;

                 maxValue = value;

                 Refresh();

             }

         }

         /// <summary>

         /// The m value

         /// </summary>

         private decimal m_value = ;

         /// <summary>

         /// Gets or sets the value.

         /// </summary>

         /// <value>The value.</value>

         [Description("值"), Category("自定义")]

         public decimal Value

         {

             get { return m_value; }

             set

             {

                 if (value <=  || value > maxValue)

                     return;

                 m_value = value;

                 Refresh();

             }

         }

         /// <summary>

         /// The m no

         /// </summary>

         private string m_NO;

         /// <summary>

         /// Gets or sets the NO.

         /// </summary>

         /// <value>The no.</value>

         [Description("编号"), Category("自定义")]

         public string NO

         {

             get { return m_NO; }

             set

             {

                 m_NO = value;

                 Refresh();

             }

         }

         /// <summary>

         /// Initializes a new instance of the <see cref="UCBottle" /> class.

         /// </summary>

         public UCBottle()

         {

             this.SetStyle(ControlStyles.AllPaintingInWmPaint, true);

             this.SetStyle(ControlStyles.DoubleBuffer, true);

             this.SetStyle(ControlStyles.ResizeRedraw, true);

             this.SetStyle(ControlStyles.Selectable, true);

             this.SetStyle(ControlStyles.SupportsTransparentBackColor, true);

             this.SetStyle(ControlStyles.UserPaint, true);

             this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.None;

             this.SizeChanged += UCBottle_SizeChanged;

             this.Size = new Size(, );

         }

         /// <summary>

         /// Handles the SizeChanged event of the UCBottle 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 UCBottle_SizeChanged(object sender, EventArgs e)

         {

             ResetWorkingRect();

         }

         /// <summary>

         /// Resets the working rect.

         /// </summary>

         private void ResetWorkingRect()

         {

             var g = this.CreateGraphics();

             var size = g.MeasureString(title, Font);

             m_workingRect = new Rectangle(, (int)size.Height + , this.Width, this.Height - ((int)size.Height + ) - );

         }

         /// <summary>

         /// 引发 <see cref="E:System.Windows.Forms.Control.Paint" /> 事件。

         /// </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();

             //写文字

             var size = g.MeasureString(title, Font);

             g.DrawString(title, Font, new SolidBrush(ForeColor), new PointF((this.Width - size.Width) / , ));

             //画空瓶子

             GraphicsPath pathPS = new GraphicsPath();

             Point[] psPS = new Point[]

             {

                 new Point(m_workingRect.Left, m_workingRect.Top),

                 new Point(m_workingRect.Right - , m_workingRect.Top),

                 new Point(m_workingRect.Right - , m_workingRect.Bottom - ),

                 new Point(m_workingRect.Right -  - m_workingRect.Width / , m_workingRect.Bottom),

                 new Point(m_workingRect.Left + m_workingRect.Width / , m_workingRect.Bottom),

                 new Point(m_workingRect.Left, m_workingRect.Bottom - ),

             };

             pathPS.AddLines(psPS);

             pathPS.CloseAllFigures();

             g.FillPath(new SolidBrush(bottleColor), pathPS);

             //画液体

             decimal decYTHeight = (m_value / maxValue) * m_workingRect.Height;

             GraphicsPath pathYT = new GraphicsPath();

             Rectangle rectYT = Rectangle.Empty;

             if (decYTHeight < )

             {

                 PointF[] psYT = new PointF[]

                 {

                     new PointF((float)(m_workingRect.Left+(-decYTHeight))+,(float)(m_workingRect.Bottom-decYTHeight)),

                     new PointF((float)(m_workingRect.Right-(-decYTHeight))-,(float)(m_workingRect.Bottom-decYTHeight)),

                     new PointF(m_workingRect.Right--m_workingRect.Width/, m_workingRect.Bottom),

                     new PointF(m_workingRect.Left+m_workingRect.Width/, m_workingRect.Bottom),

                 };

                 pathYT.AddLines(psYT);

                 pathYT.CloseAllFigures();

                 rectYT = new Rectangle((m_workingRect.Left + ( - (int)decYTHeight)) + , m_workingRect.Bottom - (int)decYTHeight - , m_workingRect.Width - (int)( - decYTHeight) *  - , );

             }

             else

             {

                 PointF[] psYT = new PointF[]

                 {

                     new PointF(m_workingRect.Left,(float)(m_workingRect.Bottom-decYTHeight)),

                     new PointF(m_workingRect.Right-,(float)(m_workingRect.Bottom-decYTHeight)),

                     new PointF(m_workingRect.Right-,m_workingRect.Bottom-),

                     new PointF(m_workingRect.Right--m_workingRect.Width/, m_workingRect.Bottom),

                     new PointF(m_workingRect.Left+m_workingRect.Width/, m_workingRect.Bottom),

                     new PointF(m_workingRect.Left,m_workingRect.Bottom-),

                 };

                 pathYT.AddLines(psYT);

                 pathYT.CloseAllFigures();

                 rectYT = new Rectangle(m_workingRect.Left, m_workingRect.Bottom - (int)decYTHeight - , m_workingRect.Width, );

             }

             g.FillPath(new SolidBrush(liquidColor), pathYT);

             g.FillPath(new SolidBrush(Color.FromArgb(, bottleMouthColor)), pathYT);

             //画液体面

             g.FillEllipse(new SolidBrush(liquidColor), rectYT);

             g.FillEllipse(new SolidBrush(Color.FromArgb(, Color.White)), rectYT);

             //画高亮

             int intCount = m_workingRect.Width /  / ;

             int intSplit = ( - ) / intCount;

             for (int i = ; i < intCount; i++)

             {

                 int _penWidth = m_workingRect.Width /  -  * i;

                 if (_penWidth <= )

                     _penWidth = ;

                 g.DrawLine(new Pen(new SolidBrush(Color.FromArgb(, Color.White)), _penWidth), new Point(m_workingRect.Width / , m_workingRect.Top), new Point(m_workingRect.Width / , m_workingRect.Bottom - ));

                 if (_penWidth == )

                     break;

             }

             //画瓶底

             g.FillEllipse(new SolidBrush(bottleColor), new RectangleF(m_workingRect.Left, m_workingRect.Top - , m_workingRect.Width - , ));

             g.FillEllipse(new SolidBrush(Color.FromArgb(, Color.White)), new RectangleF(m_workingRect.Left, m_workingRect.Top - , m_workingRect.Width - , ));

             //画瓶口

             g.FillRectangle(new SolidBrush(bottleMouthColor), new Rectangle(m_workingRect.Left + m_workingRect.Width / , m_workingRect.Bottom, m_workingRect.Width / , ));

             //画瓶颈阴影

             GraphicsPath pathPJ = new GraphicsPath();

             Point[] psPJ = new Point[]

             {

                 new Point(m_workingRect.Left, m_workingRect.Bottom-),

                 new Point(m_workingRect.Right-, m_workingRect.Bottom-),

                 new Point(m_workingRect.Right--m_workingRect.Width/, m_workingRect.Bottom),

                 new Point(m_workingRect.Left+m_workingRect.Width/, m_workingRect.Bottom)

             };

             pathPJ.AddLines(psPJ);

             pathPJ.CloseAllFigures();

             g.FillPath(new SolidBrush(Color.FromArgb(, bottleMouthColor)), pathPJ);

             //写编号

             if (!string.IsNullOrEmpty(m_NO))

             {

                 var nosize = g.MeasureString(m_NO, Font);

                 g.DrawString(m_NO, Font, new SolidBrush(ForeColor), new PointF((this.Width - nosize.Width) / , m_workingRect.Top + ));

             }

         }

     }

 }

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

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（五十六）c#Winform自定义控件-瓶子（工业）-HZHControls

官网

前提

NuGet

目录

用处及效果

准备工作

开始

最后的话

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