（三十九）c#Winform自定义控件-面包屑导航

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 

目录

https://www.cnblogs.com/bfyx/p/11364884.html

准备工作

GDI+画的，不了解GDI+可以百度了解下先

开始

添加一个用户控件，命名UCCrumbNavigation

提供属性

 1  private Color m_navColor = Color.FromArgb(100, 100, 100);
 2 
 3         public Color NavColor
 4         {
 5             get { return m_navColor; }
 6             set
 7             {
 8                 if (value == Color.Empty || value == Color.Transparent)
 9                     return;
10                 m_navColor = value;
11                 Refresh();
12             }
13         }
14 
15 
16         private string[] m_navigations = new string[] { "目录1", "目录2", "目录3" };
17         GraphicsPath[] m_paths;
18         public string[] Navigations
19         {
20             get { return m_navigations; }
21             set
22             {
23                 m_navigations = value;
24                 if (value == null)
25                     m_paths = new GraphicsPath[0];
26                 else
27                     m_paths = new GraphicsPath[value.Length];
28                 Refresh();
29             }
30         }
31 
32         public override Font Font
33         {
34             get
35             {
36                 return base.Font;
37             }
38             set
39             {
40                 base.Font = value;
41                 Refresh();
42             }
43         }
44 
45         public override System.Drawing.Color ForeColor
46         {
47             get
48             {
49                 return base.ForeColor;
50             }
51             set
52             {
53                 base.ForeColor = value;
54                 Refresh();
55             }
56         }

重绘

 1 protected override void OnPaint(PaintEventArgs e)
 2         {
 3             base.OnPaint(e);
 4 
 5             if (m_navigations != null && m_navigations.Length > 0)
 6             {
 7                 var g = e.Graphics;
 8                 int intLastX = 0;
 9                 int intLength = m_navigations.Length;
10                 for (int i = 0; i < m_navigations.Length; i++)
11                 {
12                     GraphicsPath path = new GraphicsPath();
13                     string strText = m_navigations[i];
14                     System.Drawing.SizeF sizeF = g.MeasureString(strText.Replace(" ", "A"), Font);
15                     int intTextWidth = (int)sizeF.Width + 1;
16                     path.AddLine(new Point(intLastX + 1, 1), new Point(intLastX + 1 + (i == 0 ? 0 : 10) + intTextWidth, 1));
17 
18                     //if (i != (intLength - 1))
19                     //{
20                     path.AddLine(new Point(intLastX + 1 + (i == 0 ? 0 : 10) + intTextWidth, 1), new Point(intLastX + 1 + (i == 0 ? 0 : 10) + intTextWidth + 10, this.Height / 2));
21                     path.AddLine(new Point(intLastX + 1 + (i == 0 ? 0 : 10) + intTextWidth + 10, this.Height / 2), new Point(intLastX + 1 + (i == 0 ? 0 : 10) + intTextWidth - 1, this.Height - 1));
22                     //}
23                     //else
24                     //{
25                     //    path.AddLine(new Point(intLastX + 1 + (i == 0 ? 0 : 10) + intTextWidth, 1), new Point(intLastX + 1 + (i == 0 ? 0 : 10) + intTextWidth, this.Height - 1));
26                     //}
27 
28                     path.AddLine(new Point(intLastX + 1 + (i == 0 ? 0 : 10) + intTextWidth, this.Height - 1), new Point(intLastX + 1, this.Height - 1));
29 
30                     if (i != 0)
31                     {
32                         path.AddLine(new Point(intLastX, this.Height - 1), new Point(intLastX + 1 + 10, this.Height / 2));
33                         path.AddLine(new Point(intLastX + 1 + 10, this.Height / 2), new Point(intLastX + 1, 1));
34                     }
35                     else
36                     {
37                         path.AddLine(new Point(intLastX + 1, this.Height - 1), new Point(intLastX + 1, 1));
38                     }
39                     g.FillPath(new SolidBrush(m_navColor), path);
40 
41                     g.DrawString(strText, this.Font, new SolidBrush(this.ForeColor), new PointF(intLastX + 2 + (i == 0 ? 0 : 10), (this.Height - sizeF.Height) / 2 + 1));
42                     m_paths[i] = path;
43                     intLastX += ((i == 0 ? 0 : 10) + intTextWidth + (i == (intLength - 1) ? 0 : 10));
44                 }
45             }
46 
47         }

处理一下点击事件

 1  void UCCrumbNavigation_MouseDown(object sender, MouseEventArgs e)
 2         {
 3             if (!DesignMode)
 4             {
 5                 if (m_paths != null && m_paths.Length > 0)
 6                 {
 7                     for (int i = 0; i < m_paths.Length; i++)
 8                     {
 9                         if (m_paths[i].IsVisible(e.Location))
10                         {
11                             HZH_Controls.Forms.FrmTips.ShowTipsSuccess(this.FindForm(), m_navigations[i]);
12                         }
13                     }
14                 }
15             }
16         }

完整代码如下

  1 using System;
  2 using System.Collections.Generic;
  3 using System.ComponentModel;
  4 using System.Drawing;
  5 using System.Data;
  6 using System.Linq;
  7 using System.Text;
  8 using System.Windows.Forms;
  9 using System.Drawing.Drawing2D;
 10 
 11 namespace HZH_Controls.Controls
 12 {
 13     public partial class UCCrumbNavigation : UserControl
 14     {
 15         private Color m_navColor = Color.FromArgb(100, 100, 100);
 16 
 17         public Color NavColor
 18         {
 19             get { return m_navColor; }
 20             set
 21             {
 22                 if (value == Color.Empty || value == Color.Transparent)
 23                     return;
 24                 m_navColor = value;
 25                 Refresh();
 26             }
 27         }
 28 
 29 
 30         private string[] m_navigations = new string[] { "目录1", "目录2", "目录3" };
 31         GraphicsPath[] m_paths;
 32         public string[] Navigations
 33         {
 34             get { return m_navigations; }
 35             set
 36             {
 37                 m_navigations = value;
 38                 if (value == null)
 39                     m_paths = new GraphicsPath[0];
 40                 else
 41                     m_paths = new GraphicsPath[value.Length];
 42                 Refresh();
 43             }
 44         }
 45 
 46         public override Font Font
 47         {
 48             get
 49             {
 50                 return base.Font;
 51             }
 52             set
 53             {
 54                 base.Font = value;
 55                 Refresh();
 56             }
 57         }
 58 
 59         public override System.Drawing.Color ForeColor
 60         {
 61             get
 62             {
 63                 return base.ForeColor;
 64             }
 65             set
 66             {
 67                 base.ForeColor = value;
 68                 Refresh();
 69             }
 70         }
 71 
 72         public UCCrumbNavigation()
 73         {
 74             InitializeComponent();
 75             this.SetStyle(ControlStyles.AllPaintingInWmPaint, true);
 76             this.SetStyle(ControlStyles.DoubleBuffer, true);
 77             this.SetStyle(ControlStyles.ResizeRedraw, true);
 78             this.SetStyle(ControlStyles.Selectable, true);
 79             this.SetStyle(ControlStyles.SupportsTransparentBackColor, true);
 80             this.SetStyle(ControlStyles.UserPaint, true);
 81             this.MouseDown += UCCrumbNavigation_MouseDown;
 82         }
 83 
 84         void UCCrumbNavigation_MouseDown(object sender, MouseEventArgs e)
 85         {
 86             if (!DesignMode)
 87             {
 88                 if (m_paths != null && m_paths.Length > 0)
 89                 {
 90                     for (int i = 0; i < m_paths.Length; i++)
 91                     {
 92                         if (m_paths[i].IsVisible(e.Location))
 93                         {
 94                             HZH_Controls.Forms.FrmTips.ShowTipsSuccess(this.FindForm(), m_navigations[i]);
 95                         }
 96                     }
 97                 }
 98             }
 99         }
100 
101         protected override void OnPaint(PaintEventArgs e)
102         {
103             base.OnPaint(e);
104 
105             if (m_navigations != null && m_navigations.Length > 0)
106             {
107                 var g = e.Graphics;
108                 int intLastX = 0;
109                 int intLength = m_navigations.Length;
110                 for (int i = 0; i < m_navigations.Length; i++)
111                 {
112                     GraphicsPath path = new GraphicsPath();
113                     string strText = m_navigations[i];
114                     System.Drawing.SizeF sizeF = g.MeasureString(strText.Replace(" ", "A"), Font);
115                     int intTextWidth = (int)sizeF.Width + 1;
116                     path.AddLine(new Point(intLastX + 1, 1), new Point(intLastX + 1 + (i == 0 ? 0 : 10) + intTextWidth, 1));
117 
118                     //if (i != (intLength - 1))
119                     //{
120                     path.AddLine(new Point(intLastX + 1 + (i == 0 ? 0 : 10) + intTextWidth, 1), new Point(intLastX + 1 + (i == 0 ? 0 : 10) + intTextWidth + 10, this.Height / 2));
121                     path.AddLine(new Point(intLastX + 1 + (i == 0 ? 0 : 10) + intTextWidth + 10, this.Height / 2), new Point(intLastX + 1 + (i == 0 ? 0 : 10) + intTextWidth - 1, this.Height - 1));
122                     //}
123                     //else
124                     //{
125                     //    path.AddLine(new Point(intLastX + 1 + (i == 0 ? 0 : 10) + intTextWidth, 1), new Point(intLastX + 1 + (i == 0 ? 0 : 10) + intTextWidth, this.Height - 1));
126                     //}
127 
128                     path.AddLine(new Point(intLastX + 1 + (i == 0 ? 0 : 10) + intTextWidth, this.Height - 1), new Point(intLastX + 1, this.Height - 1));
129 
130                     if (i != 0)
131                     {
132                         path.AddLine(new Point(intLastX, this.Height - 1), new Point(intLastX + 1 + 10, this.Height / 2));
133                         path.AddLine(new Point(intLastX + 1 + 10, this.Height / 2), new Point(intLastX + 1, 1));
134                     }
135                     else
136                     {
137                         path.AddLine(new Point(intLastX + 1, this.Height - 1), new Point(intLastX + 1, 1));
138                     }
139                     g.FillPath(new SolidBrush(m_navColor), path);
140 
141                     g.DrawString(strText, this.Font, new SolidBrush(this.ForeColor), new PointF(intLastX + 2 + (i == 0 ? 0 : 10), (this.Height - sizeF.Height) / 2 + 1));
142                     m_paths[i] = path;
143                     intLastX += ((i == 0 ? 0 : 10) + intTextWidth + (i == (intLength - 1) ? 0 : 10));
144                 }
145             }
146 
147         }
148     }
149 }

View Code

 1 namespace HZH_Controls.Controls
 2 {
 3     partial class UCCrumbNavigation
 4     {
 5         /// 
 
 6         /// 必需的设计器变量。
 7         /// 
 8         private System.ComponentModel.IContainer components = null;
 9 
10         /// 
 
11         /// 清理所有正在使用的资源。
12         /// 
13         /// 如果应释放托管资源，为 true；否则为 false。
14         protected override void Dispose(bool disposing)
15         {
16             if (disposing && (components != null))
17             {
18                 components.Dispose();
19             }
20             base.Dispose(disposing);
21         }
22 
23         #region 组件设计器生成的代码
24 
25         /// 
 
26         /// 设计器支持所需的方法 - 不要
27         /// 使用代码编辑器修改此方法的内容。
28         /// 
29         private void InitializeComponent()
30         {
31             this.SuspendLayout();
32             // 
33             // UCCrumbNavigation
34             // 
35             this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.None;
36             this.Cursor = System.Windows.Forms.Cursors.Hand;
37             this.ForeColor = System.Drawing.Color.FromArgb(((int)(((byte)(224)))), ((int)(((byte)(224)))), ((int)(((byte)(224)))));
38             this.MinimumSize = new System.Drawing.Size(0, 25);
39             this.Name = "UCCrumbNavigation";
40             this.Size = new System.Drawing.Size(220, 25);
41             this.ResumeLayout(false);
42 
43         }
44 
45         #endregion
46 
47 
48     }
49 }

View Code

 

用处及效果

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