（三十九）c#Winform自定義控制元件-麵包屑導航
阿新 • • 發佈：2019-08-19
前提
入行已經7,8年了，一直想做一套漂亮點的自定義控制元件，於是就有了本系列文章。
開源地址：https://gitee.com/kwwwvagaa/net_winform_custom_control
如果覺得寫的還行，請點個 star 支援一下吧
歡迎前來交流探討： 企鵝群568015492
目錄
https://www.cnblogs.com/bfyx/p/11364884.html
準備工作
GDI+畫的，不瞭解GDI+可以百度瞭解下先
開始
新增一個使用者控制元件，命名UCCrumbNavigation
提供屬性
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[] { "目錄1", "目錄2", "目錄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 }重繪
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 }處理一下點選事件
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 }完整程式碼如下
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[] { "目錄1", "目錄2", "目錄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 /// <summary>
6 /// 必需的設計器變數。
7 /// </summary>
8 private System.ComponentModel.IContainer components = null;
9
10 /// <summary>
11 /// 清理所有正在使用的資源。
12 /// </summary>
13 /// <param name="disposing">如果應釋放託管資源，為 true；否則為 false。</param>
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 元件設計器生成的程式碼
24
25 /// <summary>
26 /// 設計器支援所需的方法 - 不要
27 /// 使用程式碼編輯器修改此方法的內容。
28 /// </summary>
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
用處及效果
最後的話
如果你喜歡的話，請到 https://gitee.com/kwwwvagaa/net_winform_custom_control 點個星 星吧