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 SimpleDemo
{
 public partial class frmDrawItem : Form
 {
  public frmDrawItem()
  {
   InitializeComponent();
   //指定繪制模式，這項(xiàng)必須指定為,OwnerDrawFixed,OwnerDrawVariable
   //Normal 由操作系統(tǒng)繪制，并且元素大小都相等。 
   //OwnerDrawFixed 手動(dòng)繪制的，并且元素大小都相等。 
   //OwnerDrawVariable 手動(dòng)繪制，元素大小可能不相等。 
   comboBox2.DrawMode = DrawMode.OwnerDrawFixed;
  }

  //重繪項(xiàng)事件
  private void comboBox2_DrawItem(object sender, DrawItemEventArgs e)
  {
   //獲取要在其上繪制項(xiàng)的圖形表面
   Graphics g = e.Graphics;
   //獲取表示所繪制項(xiàng)的邊界的矩形
   System.Drawing.Rectangle rect = e.Bounds;
   //定義要繪制到控件中的圖標(biāo)圖像
   Image ico = Image.FromFile("head.png");
   //定義字體對象
   System.Drawing.Font font = new System.Drawing.Font(new FontFamily("宋體"), 12);
   if (e.Index >= 0)
   {
    //獲得當(dāng)前Item的文本
    string tempString = comboBox2.Items[e.Index].ToString();
    //如果當(dāng)前項(xiàng)是沒有狀態(tài)的普通項(xiàng)
    if (e.State == DrawItemState.None)
    {
     //在當(dāng)前項(xiàng)圖形表面上劃一個(gè)矩形
     g.FillRectangle(new SolidBrush(Color.FromArgb(200, 230, 255)), rect);
     //在當(dāng)前項(xiàng)圖形表面上劃上圖標(biāo)
     g.DrawImage(ico, new Point(rect.Left, rect.Top));
     //在當(dāng)前項(xiàng)圖形表面上劃上當(dāng)前Item的文本
     g.DrawString(tempString, font, new SolidBrush(Color.Black), rect.Left + ico.Size.Width, rect.Top);
     //將繪制聚焦框
     e.DrawFocusRectangle();
    }
    else
    {
     e.Graphics.FillRectangle(new SolidBrush(Color.LightBlue), rect);
     g.DrawImage(ico, new Point(rect.Left, rect.Top));
     g.DrawString(tempString, font, new SolidBrush(Color.Black), rect.Left + ico.Size.Width, rect.Top);
     e.DrawFocusRectangle();
    }
   }
  }

 }
}