tabcontrol重绘的问题

Question

using System.Drawing;
using System.Windows.Forms;public class Form1 : Form
{
    private Rectangle tabArea;
    private RectangleF tabTextArea;    public Form1()
    {
        TabControl tabControl1 = new TabControl();
        TabPage tabPage1 = new TabPage();        // Allows access to the DrawItem event. 
        tabControl1.DrawMode = TabDrawMode.OwnerDrawFixed;        tabControl1.SizeMode = TabSizeMode.Fixed;
        tabControl1.Controls.Add(tabPage1);
        tabControl1.ItemSize = new Size(80, 30);
        tabControl1.Location = new Point(25, 25);
        tabControl1.Size = new Size(250, 250);
        tabPage1.TabIndex = 0;
        ClientSize = new Size(300, 300);
        Controls.Add(tabControl1);
        TabPage tabPage2 = new TabPage();
        tabControl1.Controls.Add(tabPage2);
        tabPage2.TabIndex = 1;        tabArea = tabControl1.GetTabRect(0);
        tabTextArea = (RectangleF)tabControl1.GetTabRect(0);
        tabControl1.DrawItem += new DrawItemEventHandler(DrawOnTab);
    }    private void DrawOnTab(object sender, DrawItemEventArgs e)
    {
        MessageBox.Show(e.Index.ToString());
        Graphics g = e.Graphics;
        Pen p = new Pen(Color.Red);
        Font font = new Font("Arial", 10.0f);
        SolidBrush brush = new SolidBrush(Color.Red);        g.DrawRectangle(p, tabArea);
        g.DrawString("tabPage1", font, brush, tabTextArea);
    }    static void Main()
    {
        Application.Run(new Form1());
    }    private void InitializeComponent()
    {
        this.SuspendLayout();
   
        this.ClientSize = new System.Drawing.Size(292, 273);
        this.Name = "Form1";
        this.Load += new System.EventHandler(this.Form1_Load);
        this.ResumeLayout(false);    }    private void Form1_Load(object sender, System.EventArgs e)
    {    }
}
我想重绘tabcontrol，但是只有第一个tab得到了重绘，

Answer 1

  因为你的重绘范围始终是第一个tabpage，所以
  tabArea = tabControl1.GetTabRect(0);
  tabTextArea = (RectangleF)tabControl1.GetTabRect(0);  //DrawOnTab改成这样就可以了
private void DrawOnTab(object sender, DrawItemEventArgs e)
  {
            Graphics g = e.Graphics;
            Pen p = new Pen(Color.Red);
            Font font = new Font("Arial", 10.0f);
            SolidBrush brush = new SolidBrush(Color.Red);            for (int i = 0; i < tabControl1.TabPages.Count; i++)
            {
                tabArea = tabControl1.GetTabRect(i);
                tabTextArea = (RectangleF)tabControl1.GetTabRect(i);
                g.DrawRectangle(p, tabArea);
                g.DrawString("tabPage"+(i+1).ToString(),font,brush,tabTextArea);            }}