[转]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:效果如同所示：

using System;

using System.Collections.Generic;

using System.ComponentModel;

using System.Data;

using System.Drawing;

using System.Linq;

using System.Text;

using System.Windows.Forms;

 

namespace WindowsFormsApplication1.june

{

    public partial class TabTest : Form

    {

        public TabTest()

        {

            InitializeComponent();

        }

 

        private void TabTest_Load(object sender, EventArgs e)

        {

            //清空控件

            //this.MainTabControl.TabPages.Clear();

            //绘制的方式OwnerDrawFixed表示由窗体绘制大小也一样

            this.MainTabControl.DrawMode = TabDrawMode.OwnerDrawFixed;

            this.MainTabControl.Padding = new System.Drawing.Point(CLOSE_SIZE, CLOSE_SIZE);

            this.MainTabControl.DrawItem += new DrawItemEventHandler(this.MainTabControl_DrawItem);

            this.MainTabControl.MouseDown += new System.Windows.Forms.MouseEventHandler(this.MainTabControl_MouseDown);

        }

 

        const int CLOSE_SIZE = 15;

        //tabPage标签图片

        Bitmap image = new Bitmap("E:\ico_close.gif");

 

        //绘制“Ｘ”号即关闭按钮

        private void MainTabControl_DrawItem(object sender, DrawItemEventArgs e)

        {

            try

            {

                Rectangle myTabRect = this.MainTabControl.GetTabRect(e.Index);

 

                //先添加TabPage属性  

                e.Graphics.DrawString(this.MainTabControl.TabPages[e.Index].Text, this.Font, SystemBrushes.ControlText, myTabRect.X + 2, myTabRect.Y + 2);

 

                //再画一个矩形框

                using (Pen p = new Pen(Color.White))

                {

                    myTabRect.Offset(myTabRect.Width - (CLOSE_SIZE + 3), 2);

                    myTabRect.Width = CLOSE_SIZE;

                    myTabRect.Height = CLOSE_SIZE;

                    e.Graphics.DrawRectangle(p, myTabRect);

                }

 

                //填充矩形框

                Color recColor = e.State == DrawItemState.Selected ? Color.White : Color.White;

                using (Brush b = new SolidBrush(recColor))

                {

                    e.Graphics.FillRectangle(b, myTabRect);

                }

 

                //画关闭符号

                using (Pen objpen = new Pen(Color.Black))

                {

                    ////=============================================

                    //自己画X

                    ////""线

                    //Point p1 = new Point(myTabRect.X + 3, myTabRect.Y + 3);

                    //Point p2 = new Point(myTabRect.X + myTabRect.Width - 3, myTabRect.Y + myTabRect.Height - 3);

                    //e.Graphics.DrawLine(objpen, p1, p2);

                    ////"/"线

                    //Point p3 = new Point(myTabRect.X + 3, myTabRect.Y + myTabRect.Height - 3);

                    //Point p4 = new Point(myTabRect.X + myTabRect.Width - 3, myTabRect.Y + 3);

                    //e.Graphics.DrawLine(objpen, p3, p4);

 

                    ////=============================================

                    //使用图片

                    Bitmap bt = new Bitmap(image);

                    Point p5 = new Point(myTabRect.X, 4);

                    e.Graphics.DrawImage(bt, p5);

                    //e.Graphics.DrawString(this.MainTabControl.TabPages[e.Index].Text, this.Font, objpen.Brush, p5);

                }

                e.Graphics.Dispose();

            }

            catch (Exception)

            { }

        }

 

        //关闭按钮功能

        private void MainTabControl_MouseDown(object sender, MouseEventArgs e)

        {

            if (e.Button == MouseButtons.Left)

            {

                int x = e.X, y = e.Y;

                //计算关闭区域  

                Rectangle myTabRect = this.MainTabControl.GetTabRect(this.MainTabControl.SelectedIndex);

 

                myTabRect.Offset(myTabRect.Width - (CLOSE_SIZE + 3), 2);

                myTabRect.Width = CLOSE_SIZE;

                myTabRect.Height = CLOSE_SIZE;

 

                //如果鼠标在区域内就关闭选项卡  

                bool isClose = x > myTabRect.X && x < myTabRect.Right && y > myTabRect.Y && y < myTabRect.Bottom;

                if (isClose == true)

                {

                    this.MainTabControl.TabPages.Remove(this.MainTabControl.SelectedTab);

                }

            }

        }

    }

}

可以加一个imageList，然后设置tabControl的imageList属性，再设置各个tab的ImageIndex或ImageKey属性，即可，只不过这样图标会在文本的左侧。如同所示：