Question

c#.请问如何给tancontrol中的tabpage添加一个关闭事件，让在关闭tabpage时发生该事件。。

如题，本身在tancontrol中没找到这个事件，是不是需要重写控件？

Answer 1

C#重绘TabControl的Tabpage标签，添加图片及关闭按钮

以下就是C#重绘TabControl控件的源码：
1 using System;
2 using System.Collections.Generic;
3 using System.ComponentModel;
4 using System.Data;
5 using System.Drawing;
6 using System.Linq;
7 using System.Text;
8 using System.Windows.Forms;
9
10
11 namespace TabControlTest
12 {
13 public partial class Form1 : Form
14 {
15 public Form1()
16 {
17 InitializeComponent();
18 }
19
20 const int CLOSE_SIZE = 15;
21 //tabPage标签图片
22 Bitmap image = new Bitmap("E:\\1\\2.jpg");
23 //绘制“X”号即关闭按钮
24 private void MainTabControl_DrawItem(object sender, DrawItemEventArgs e)
25 {
26
27 try
28 {
29 Rectangle myTabRect = this.MainTabControl.GetTabRect(e.Index);
30
31 //先添加TabPage属性
32 e.Graphics.DrawString(this.MainTabControl.TabPages[e.Index].Text
33 , this.Font, SystemBrushes.ControlText, myTabRect.X + 2, myTabRect.Y + 2);
34
35 //再画一个矩形框
36 using (Pen p = new Pen(Color.White))
37 {
38 myTabRect.Offset(myTabRect.Width - (CLOSE_SIZE + 3), 2);
39 myTabRect.Width = CLOSE_SIZE;
40 myTabRect.Height = CLOSE_SIZE;
41 e.Graphics.DrawRectangle(p, myTabRect);
42
43 }
44
45 //填充矩形框
46 Color recColor = e.State == DrawItemState.Selected ? Color.White : Color.White;
47 using (Brush b = new SolidBrush(recColor))
48 {
49 e.Graphics.FillRectangle(b, myTabRect);
50 }
51
52 //画关闭符号
53 using (Pen objpen = new Pen(Color.Black))
54 {
55 //"\"线
56 Point p1 = new Point(myTabRect.X + 3, myTabRect.Y + 3);
57 Point p2 = new Point(myTabRect.X + myTabRect.Width - 3, myTabRect.Y + myTabRect.Height - 3);
58 e.Graphics.DrawLine(objpen, p1, p2);
59
60 //"/"线
61 Point p3 = new Point(myTabRect.X + 3, myTabRect.Y + myTabRect.Height - 3);
62 Point p4 = new Point(myTabRect.X + myTabRect.Width - 3, myTabRect.Y + 3);
63 e.Graphics.DrawLine(objpen, p3, p4);
64 ////=============================================
65 Bitmap bt = new Bitmap(image);
66 Point p5 = new Point(myTabRect.X-50, 4);
67 e.Graphics.DrawImage(bt, p5);
68 //e.Graphics.DrawString(this.MainTabControl.TabPages[e.Index].Text, this.Font, objpen.Brush, p5);
69 }
70
71
72 //绘制小图标
73 //==============================================================================
74 //Bitmap bt = new Bitmap("E:\\1\\2.jpg");
75 //Point p5 = new Point(4, 4);
76 ////e.Graphics.DrawImage(bt, e.Bounds);
77 //e.Graphics.DrawImage(bt, p5);
78 //Pen pt = new Pen(Color.Red);
79 ////e.Graphics.DrawString(this.MainTabControl.TabPages[e.Index].Text, this.Font, pt.Brush, e.Bounds);
80 //e.Graphics.DrawString(this.MainTabControl.TabPages[e.Index].Text, this.Font, pt.Brush, p5);
81
82 e.Graphics.Dispose();
83 }
84 catch (Exception)
85 {
86
87 }
88
89
90 }
91 //=======================================================================
92
93 //关闭按钮功能
94 private void MainTabControl_MouseDown(object sender, MouseEventArgs e)
95 {
96 if (e.Button == MouseButtons.Left)
97 {
98 int x = e.X, y = e.Y;
99
100 //计算关闭区域
101 Rectangle myTabRect = this.MainTabControl.GetTabRect(this.MainTabControl.SelectedIndex);
102
103 myTabRect.Offset(myTabRect.Width - (CLOSE_SIZE + 3), 2);
104 myTabRect.Width = CLOSE_SIZE;
105 myTabRect.Height = CLOSE_SIZE;
106
107 //如果鼠标在区域内就关闭选项卡
108 bool isClose = x > myTabRect.X && x < myTabRect.Right
109 && y > myTabRect.Y && y < myTabRect.Bottom;
110
111 if (isClose == true)
112 {
113 this.MainTabControl.TabPages.Remove(this.MainTabControl.SelectedTab);
114 }
115 }
116
117
118 }
119 //初始化页面
120 private void Form1_Load(object sender, EventArgs e)
121 {
122 //清空控件
123 //this.MainTabControl.TabPages.Clear();
124 //绘制的方式OwnerDrawFixed表示由窗体绘制大小也一样
125 this.MainTabControl.DrawMode = TabDrawMode.OwnerDrawFixed;
126 this.MainTabControl.Padding = new System.Drawing.Point(CLOSE_SIZE, CLOSE_SIZE);
127 this.MainTabControl.DrawItem += new DrawItemEventHandler(this.MainTabControl_DrawItem);
128 this.MainTabControl.MouseDown += new System.Windows.Forms.MouseEventHandler(this.MainTabControl_MouseDown);
129 }
130
131 //添加新的tabPage并修改所有tabPage标签上面的图片
132 private void button1_Click(object sender, EventArgs e)
133 {
134 TabPage tabtage=new TabPage ();
135 MainTabControl.TabPages.Add(tabtage);
136 MainTabControl.SelectedTab = tabtage;
137 image = new Bitmap("E:\\1\\3.jpg");
138
139
140 }
141 //关闭选中的tabPage
142 private void button2_Click(object sender, EventArgs e)
143 {
144 MainTabControl.TabPages.Remove(MainTabControl.SelectedTab);
145 }
146
147
148
149 }
150 }

C#重绘TabControl的Tabpage标签，添加图片及关闭按钮就像你介绍到这里了，希望对你有所帮助。

Answer 2

这个只要动下脑筋就搞定了，谁讲了tabControl一定要上边标签来控制？
你拖一个Panel把他的四边盖住，索性让人看不出他是这玩意，再拖一哦Panel把他的选项标签全部盖住，往下盖彻底了，多盖到界面上也不要紧。
tabControl可以自动加tabPage，也可以自动删除tabPage，
在tabPage创建的时候在可视区域画个Panel，把你要做的界面写成一个一个的form，让panel加载Forms。这样就达到了切换界面的目的。
写到这，很多人会问，为什么我们不用panel直接做，还做这种事情，提出这种问题是你对用户体验了解太少，编辑状态的界面切换和更新是两码事，tabControl是切换，Panel加载是更新。
第三方控件也可以，但是做安装包你就郁闷了