（八十四）c#Winform自定义控件-导航菜单（类Office菜单）

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 

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

没什么准备的，就是组装控件

开始

添加一个用户控件UCNavigationMenuOffice

添加属性

 /// <summary>
         /// The main menu height
         /// </summary>
         private int mainMenuHeight = ;

         /// <summary>
         /// Gets or sets the height of the main menu.
         /// </summary>
         /// <value>The height of the main menu.</value>
         [Description("主菜单高度，大于20的值"), Category("自定义")]
         public int MainMenuHeight
         {
             get { return mainMenuHeight; }
             set
             {
                 if (value < )
                     return;
                 mainMenuHeight = value;
                 this.panMenu.Height = value;
             }
         }
         /// <summary>
         /// The expand height
         /// </summary>
         private int expandHeight = ;
         /// <summary>
         /// Gets or sets the height of the expand.
         /// </summary>
         /// <value>The height of the expand.</value>
         [Description("展开后高度"), Category("自定义")]
         public int ExpandHeight
         {
             get { return expandHeight; }
             set { expandHeight = value; }
         }
         /// <summary>
         /// The is expand
         /// </summary>
         private bool isExpand = true;
         /// <summary>
         /// Gets or sets a value indicating whether this instance is expand.
         /// </summary>
         /// <value><c>true</c> if this instance is expand; otherwise, <c>false</c>.</value>
         [Description("是否展开"), Category("自定义")]
         public bool IsExpand
         {
             get { return isExpand; }
             set
             {
                 isExpand = value;
                 if (value)
                 {
                     this.Height = expandHeight;
                     ResetChildControl();
                 }
                 else
                 {
                     this.Height = this.panMenu.Height;
                     this.panChilds.Controls.Clear();
                 }
             }
         }
         /// <summary>
         /// Occurs when [click itemed].
         /// </summary>
         [Description("点击节点事件"), Category("自定义")]

         public event EventHandler ClickItemed;
         /// <summary>
         /// The select item
         /// </summary>
         private NavigationMenuItemExt selectItem = null;

         /// <summary>
         /// Gets the select item.
         /// </summary>
         /// <value>The select item.</value>
         [Description("选中的节点"), Category("自定义")]
         public NavigationMenuItemExt SelectItem
         {
             get { return selectItem; }
             private set { selectItem = value; }
         }

         /// <summary>
         /// The items
         /// </summary>
         NavigationMenuItemExt[] items;

         /// <summary>
         /// Gets or sets the items.
         /// </summary>
         /// <value>The items.</value>
         [Description("节点列表"), Category("自定义")]
         public NavigationMenuItemExt[] Items
         {
             get { return items; }
             set
             {
                 items = value;
                 ReloadMenu();
                 if (value != null && value.Length > )
                 {
                     selectItem = value[];
                     ResetChildControl();
                 }
             }
         }
         /// <summary>
         /// The tip color
         /// </summary>
         private Color tipColor = Color.FromArgb(, , );

         /// <summary>
         /// Gets or sets the color of the tip.
         /// </summary>
         /// <value>The color of the tip.</value>
         [Description("角标颜色"), Category("自定义")]
         public Color TipColor
         {
             get { return tipColor; }
             set { tipColor = value; }
         }

         /// <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>
         public override System.Drawing.Color ForeColor
         {
             get
             {
                 return base.ForeColor;
             }
             set
             {
                 base.ForeColor = value;
                 foreach (Control c in this.Controls)
                 {
                     c.ForeColor = value;
                 }
             }
         }
         /// <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>
         public override Font Font
         {
             get
             {
                 return base.Font;
             }
             set
             {
                 base.Font = value;
                 foreach (Control c in this.Controls)
                 {
                     c.Font = value;
                 }
             }
         }

         /// <summary>
         /// The m LST anchors
         /// </summary>
         Dictionary<NavigationMenuItemExt, FrmAnchor> m_lstAnchors = new Dictionary<NavigationMenuItemExt, FrmAnchor>();

一些事件及辅助函数，处理大小改变时候和重新加载以及鼠标对应处理

   /// <summary>
         /// Handles the SizeChanged event of the UCNavigationMenuOffice 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 UCNavigationMenuOffice_SizeChanged(object sender, EventArgs e)
         {
             if (isExpand)
             {
                 expandHeight = this.Height;
             }
         }

         /// <summary>
         /// Resets the child control.
         /// </summary>
         public void ResetChildControl()
         {
             if (isExpand)
             {
                 if (selectItem != null)
                 {
                     try
                     {
                         ControlHelper.FreezeControl(this, true);
                         this.panChilds.Controls.Clear();
                         if (selectItem.ShowControl != null)
                         {
                             HZH_Controls.Controls.UCSplitLine_H split = new UCSplitLine_H();
                             split.BackColor = Color.FromArgb(, , , );
                             split.Dock = DockStyle.Top;
                             this.panChilds.Controls.Add(split);
                             split.BringToFront();
                             this.panChilds.Controls.Add(selectItem.ShowControl);
                             selectItem.ShowControl.Dock = DockStyle.Fill;
                         }
                     }
                     finally
                     {
                         ControlHelper.FreezeControl(this, false);
                     }
                 }
             }
         }

         /// <summary>
         /// Reloads the menu.
         /// </summary>
         private void ReloadMenu()
         {
             try
             {
                 ControlHelper.FreezeControl(this, true);
                 this.panMenu.Controls.Clear();
                 if (items != null && items.Length > )
                 {
                     foreach (var item in items)
                     {
                         var menu = (NavigationMenuItemExt)item;
                         Label lbl = new Label();
                         lbl.AutoSize = false;
                         lbl.TextAlign = ContentAlignment.MiddleCenter;
                         lbl.Width = menu.ItemWidth;
                         lbl.Text = menu.Text;

                         lbl.Font = Font;
                         lbl.ForeColor = ForeColor;

                         lbl.Paint += lbl_Paint;
                         lbl.MouseEnter += lbl_MouseEnter;
                         lbl.Tag = menu;
                         lbl.Click += lbl_Click;
                         lbl.DoubleClick += lbl_DoubleClick;
                         if (menu.AnchorRight)
                         {
                             lbl.Dock = DockStyle.Right;
                         }
                         else
                         {
                             lbl.Dock = DockStyle.Left;
                         }
                         this.panMenu.Controls.Add(lbl);

                         lbl.BringToFront();
                     }
                 }
             }
             finally
             {
                 ControlHelper.FreezeControl(this, false);
             }
         }

         /// <summary>
         /// Handles the DoubleClick event of the lbl 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 lbl_DoubleClick(object sender, EventArgs e)
         {
             IsExpand = !IsExpand;
         }
         /// <summary>
         /// Handles the Click event of the lbl 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 lbl_Click(object sender, EventArgs e)
         {
             Label lbl = sender as Label;
             if (lbl.Tag != null)
             {
                 var menu = (NavigationMenuItemExt)lbl.Tag;
                 if (menu.ShowControl == null)
                 {
                     selectItem = menu;

                     if (ClickItemed != null)
                     {
                         ClickItemed(this, e);
                     }
                 }
                 else
                 {
                     if (IsExpand)
                     {
                         selectItem = menu;
                         ResetChildControl();
                     }
                 }
             }
         }
         /// <summary>
         /// Handles the MouseEnter event of the lbl 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 lbl_MouseEnter(object sender, EventArgs e)
         {
             if (!IsExpand)
             {
                 Label lbl = sender as Label;
                 var menu = lbl.Tag as NavigationMenuItemExt;
                 foreach (var item in m_lstAnchors)
                 {
                     m_lstAnchors[item.Key].Hide();
                 }
                 if (menu.ShowControl != null)
                 {
                     if (!m_lstAnchors.ContainsKey(menu))
                     {
                         m_lstAnchors[menu] = new FrmAnchor(panMenu, menu.ShowControl, isNotFocus: false);

                     }
                     m_lstAnchors[menu].BackColor = this.BackColor;
                     m_lstAnchors[menu].Show(this);
                     m_lstAnchors[menu].Size = new Size(this.panChilds.Width, expandHeight - mainMenuHeight);
                 }
             }
         }
         /// <summary>
         /// Handles the Paint event of the lbl control.
         /// </summary>
         /// <param name="sender">The source of the event.</param>
         /// <param name="e">The <see cref="PaintEventArgs" /> instance containing the event data.</param>
         void lbl_Paint(object sender, PaintEventArgs e)
         {
             Label lbl = sender as Label;
             if (lbl.Tag != null)
             {
                 var menu = (NavigationMenuItemExt)lbl.Tag;
                 e.Graphics.SetGDIHigh();

                 if (menu.ShowTip)
                 {
                     if (!string.IsNullOrEmpty(menu.TipText))
                     {
                         var rect = new Rectangle(lbl.Width - , lbl.Height /  - , , );
                         var path = rect.CreateRoundedRectanglePath();
                         e.Graphics.FillPath(new SolidBrush(tipColor), path);
                         e.Graphics.DrawString(menu.TipText, new Font("微软雅黑", 8f), new SolidBrush(Color.White), rect, new StringFormat() { Alignment = StringAlignment.Center, LineAlignment = StringAlignment.Center });
                     }
                     else
                     {
                         e.Graphics.FillEllipse(new SolidBrush(tipColor), new Rectangle(lbl.Width - , lbl.Height /  - , , ));
                     }
                 }
                 if (menu.Icon != null)
                 {
                     e.Graphics.DrawImage(menu.Icon, new Rectangle(, (lbl.Height - ) / , , ), , , menu.Icon.Width, menu.Icon.Height, GraphicsUnit.Pixel);
                 }
             }
         }

完整代码

 // ***********************************************************************
 // Assembly         : HZH_Controls
 // Created          : 2019-10-12
 //
 // ***********************************************************************
 // <copyright file="UCNavigationMenuOffice.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.ComponentModel;
 using System.Drawing;
 using System.Data;
 using System.Linq;
 using System.Text;
 using System.Windows.Forms;
 using HZH_Controls.Forms;

 namespace HZH_Controls.Controls
 {
     /// <summary>
     /// Class UCNavigationMenuOffice.
     /// Implements the <see cref="System.Windows.Forms.UserControl" />
     /// </summary>
     /// <seealso cref="System.Windows.Forms.UserControl" />
     public partial class UCNavigationMenuOffice : UserControl
     {
         /// <summary>
         /// The main menu height
         /// </summary>
         private int mainMenuHeight = ;

         /// <summary>
         /// Gets or sets the height of the main menu.
         /// </summary>
         /// <value>The height of the main menu.</value>
         [Description("主菜单高度，大于20的值"), Category("自定义")]
         public int MainMenuHeight
         {
             get { return mainMenuHeight; }
             set
             {
                 if (value < )
                     return;
                 mainMenuHeight = value;
                 this.panMenu.Height = value;
             }
         }
         /// <summary>
         /// The expand height
         /// </summary>
         private int expandHeight = ;
         /// <summary>
         /// Gets or sets the height of the expand.
         /// </summary>
         /// <value>The height of the expand.</value>
         [Description("展开后高度"), Category("自定义")]
         public int ExpandHeight
         {
             get { return expandHeight; }
             set { expandHeight = value; }
         }
         /// <summary>
         /// The is expand
         /// </summary>
         private bool isExpand = true;
         /// <summary>
         /// Gets or sets a value indicating whether this instance is expand.
         /// </summary>
         /// <value><c>true</c> if this instance is expand; otherwise, <c>false</c>.</value>
         [Description("是否展开"), Category("自定义")]
         public bool IsExpand
         {
             get { return isExpand; }
             set
             {
                 isExpand = value;
                 if (value)
                 {
                     this.Height = expandHeight;
                     ResetChildControl();
                 }
                 else
                 {
                     this.Height = this.panMenu.Height;
                     this.panChilds.Controls.Clear();
                 }
             }
         }
         /// <summary>
         /// Occurs when [click itemed].
         /// </summary>
         [Description("点击节点事件"), Category("自定义")]

         public event EventHandler ClickItemed;
         /// <summary>
         /// The select item
         /// </summary>
         private NavigationMenuItemExt selectItem = null;

         /// <summary>
         /// Gets the select item.
         /// </summary>
         /// <value>The select item.</value>
         [Description("选中的节点"), Category("自定义")]
         public NavigationMenuItemExt SelectItem
         {
             get { return selectItem; }
             private set { selectItem = value; }
         }

         /// <summary>
         /// The items
         /// </summary>
         NavigationMenuItemExt[] items;

         /// <summary>
         /// Gets or sets the items.
         /// </summary>
         /// <value>The items.</value>
         [Description("节点列表"), Category("自定义")]
         public NavigationMenuItemExt[] Items
         {
             get { return items; }
             set
             {
                 items = value;
                 ReloadMenu();
                 if (value != null && value.Length > )
                 {
                     selectItem = value[];
                     ResetChildControl();
                 }
             }
         }
         /// <summary>
         /// The tip color
         /// </summary>
         private Color tipColor = Color.FromArgb(, , );

         /// <summary>
         /// Gets or sets the color of the tip.
         /// </summary>
         /// <value>The color of the tip.</value>
         [Description("角标颜色"), Category("自定义")]
         public Color TipColor
         {
             get { return tipColor; }
             set { tipColor = value; }
         }

         /// <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>
         public override System.Drawing.Color ForeColor
         {
             get
             {
                 return base.ForeColor;
             }
             set
             {
                 base.ForeColor = value;
                 foreach (Control c in this.Controls)
                 {
                     c.ForeColor = value;
                 }
             }
         }
         /// <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>
         public override Font Font
         {
             get
             {
                 return base.Font;
             }
             set
             {
                 base.Font = value;
                 foreach (Control c in this.Controls)
                 {
                     c.Font = value;
                 }
             }
         }

         /// <summary>
         /// The m LST anchors
         /// </summary>
         Dictionary<NavigationMenuItemExt, FrmAnchor> m_lstAnchors = new Dictionary<NavigationMenuItemExt, FrmAnchor>();
         /// <summary>
         /// Initializes a new instance of the <see cref="UCNavigationMenuOffice"/> class.
         /// </summary>
         public UCNavigationMenuOffice()
         {
             InitializeComponent();
             this.SizeChanged += UCNavigationMenuOffice_SizeChanged;
             items = new NavigationMenuItemExt[];
             if (ControlHelper.IsDesignMode())
             {
                 items = new NavigationMenuItemExt[];
                 for (int i = ; i < ; i++)
                 {
                     items[i] = new NavigationMenuItemExt()
                     {
                         Text = "菜单" + (i + ),
                         AnchorRight = i >=
                     };
                 }
             }
         }

         /// <summary>
         /// Handles the SizeChanged event of the UCNavigationMenuOffice 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 UCNavigationMenuOffice_SizeChanged(object sender, EventArgs e)
         {
             if (isExpand)
             {
                 expandHeight = this.Height;
             }
         }

         /// <summary>
         /// Resets the child control.
         /// </summary>
         public void ResetChildControl()
         {
             if (isExpand)
             {
                 if (selectItem != null)
                 {
                     try
                     {
                         ControlHelper.FreezeControl(this, true);
                         this.panChilds.Controls.Clear();
                         if (selectItem.ShowControl != null)
                         {
                             HZH_Controls.Controls.UCSplitLine_H split = new UCSplitLine_H();
                             split.BackColor = Color.FromArgb(, , , );
                             split.Dock = DockStyle.Top;
                             this.panChilds.Controls.Add(split);
                             split.BringToFront();
                             this.panChilds.Controls.Add(selectItem.ShowControl);
                             selectItem.ShowControl.Dock = DockStyle.Fill;
                         }
                     }
                     finally
                     {
                         ControlHelper.FreezeControl(this, false);
                     }
                 }
             }
         }

         /// <summary>
         /// Reloads the menu.
         /// </summary>
         private void ReloadMenu()
         {
             try
             {
                 ControlHelper.FreezeControl(this, true);
                 this.panMenu.Controls.Clear();
                 if (items != null && items.Length > )
                 {
                     foreach (var item in items)
                     {
                         var menu = (NavigationMenuItemExt)item;
                         Label lbl = new Label();
                         lbl.AutoSize = false;
                         lbl.TextAlign = ContentAlignment.MiddleCenter;
                         lbl.Width = menu.ItemWidth;
                         lbl.Text = menu.Text;

                         lbl.Font = Font;
                         lbl.ForeColor = ForeColor;

                         lbl.Paint += lbl_Paint;
                         lbl.MouseEnter += lbl_MouseEnter;
                         lbl.Tag = menu;
                         lbl.Click += lbl_Click;
                         lbl.DoubleClick += lbl_DoubleClick;
                         if (menu.AnchorRight)
                         {
                             lbl.Dock = DockStyle.Right;
                         }
                         else
                         {
                             lbl.Dock = DockStyle.Left;
                         }
                         this.panMenu.Controls.Add(lbl);

                         lbl.BringToFront();
                     }
                 }
             }
             finally
             {
                 ControlHelper.FreezeControl(this, false);
             }
         }

         /// <summary>
         /// Handles the DoubleClick event of the lbl 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 lbl_DoubleClick(object sender, EventArgs e)
         {
             IsExpand = !IsExpand;
         }
         /// <summary>
         /// Handles the Click event of the lbl 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 lbl_Click(object sender, EventArgs e)
         {
             Label lbl = sender as Label;
             if (lbl.Tag != null)
             {
                 var menu = (NavigationMenuItemExt)lbl.Tag;
                 if (menu.ShowControl == null)
                 {
                     selectItem = menu;

                     if (ClickItemed != null)
                     {
                         ClickItemed(this, e);
                     }
                 }
                 else
                 {
                     if (IsExpand)
                     {
                         selectItem = menu;
                         ResetChildControl();
                     }
                 }
             }
         }
         /// <summary>
         /// Handles the MouseEnter event of the lbl 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 lbl_MouseEnter(object sender, EventArgs e)
         {
             if (!IsExpand)
             {
                 Label lbl = sender as Label;
                 var menu = lbl.Tag as NavigationMenuItemExt;
                 foreach (var item in m_lstAnchors)
                 {
                     m_lstAnchors[item.Key].Hide();
                 }
                 if (menu.ShowControl != null)
                 {
                     if (!m_lstAnchors.ContainsKey(menu))
                     {
                         m_lstAnchors[menu] = new FrmAnchor(panMenu, menu.ShowControl, isNotFocus: false);

                     }
                     m_lstAnchors[menu].BackColor = this.BackColor;
                     m_lstAnchors[menu].Show(this);
                     m_lstAnchors[menu].Size = new Size(this.panChilds.Width, expandHeight - mainMenuHeight);
                 }
             }
         }
         /// <summary>
         /// Handles the Paint event of the lbl control.
         /// </summary>
         /// <param name="sender">The source of the event.</param>
         /// <param name="e">The <see cref="PaintEventArgs" /> instance containing the event data.</param>
         void lbl_Paint(object sender, PaintEventArgs e)
         {
             Label lbl = sender as Label;
             if (lbl.Tag != null)
             {
                 var menu = (NavigationMenuItemExt)lbl.Tag;
                 e.Graphics.SetGDIHigh();

                 if (menu.ShowTip)
                 {
                     if (!string.IsNullOrEmpty(menu.TipText))
                     {
                         var rect = new Rectangle(lbl.Width - , lbl.Height /  - , , );
                         var path = rect.CreateRoundedRectanglePath();
                         e.Graphics.FillPath(new SolidBrush(tipColor), path);
                         e.Graphics.DrawString(menu.TipText, new Font("微软雅黑", 8f), new SolidBrush(Color.White), rect, new StringFormat() { Alignment = StringAlignment.Center, LineAlignment = StringAlignment.Center });
                     }
                     else
                     {
                         e.Graphics.FillEllipse(new SolidBrush(tipColor), new Rectangle(lbl.Width - , lbl.Height /  - , , ));
                     }
                 }
                 if (menu.Icon != null)
                 {
                     e.Graphics.DrawImage(menu.Icon, new Rectangle(, (lbl.Height - ) / , , ), , , menu.Icon.Width, menu.Icon.Height, GraphicsUnit.Pixel);
                 }
             }
         }
     }
 }

最后的话

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