下面的代码实现了带图标的ListBoox的功能，可以直接拷贝即可运行。运行结果如下：
<![CDATA[using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.<a class="channel_keylink" href="http://windows.chinaitlab.com/" target="_blank">Windows</a>.Forms;
using System.Data;
namespace ListBoxWithIcon
{
/// <summary>
/// Form1 的摘要说明。
/// </summary>
public class Form1 : System.<a class="channel_keylink" href="http://windows.chinaitlab.com/" target="_blank">Windows</a>.Forms.Form
{
private GListBox lb;
/// <summary>
/// 必需的设计器变量。
/// </summary>
private System.ComponentModel.Container components = null;
public Form1()
{
//
// Windows 窗体设计器支持所必需的
//
InitializeComponent();
//
// TODO: 在 InitializeComponent 调用后添加任何构造函数代码
//
}
/// <summary>
/// 清理所有正在使用的资源。
/// </summary>
protected override void Dispose( bool disposing )
{
if( disposing )
{
if (components != null)
{
components.Dispose();
}
}
base.Dispose( disposing );
}
#region Windows 窗体设计器生成的代码
/// <summary>
/// 设计器支持所需的方法 - 不要使用代码编辑器修改
/// 此方法的内容。
/// </summary>
private void InitializeComponent()
{
ImageList imageList = new ImageList();
imageList.Images.Add(Image.FromFile(@"D:\我的文件\myrice\favicon.ico"));
imageList.Images.Add(Image.FromFile(@"D:\我的文件\myrice\favicon4.ico"));
imageList.Images.Add(Image.FromFile(@"D:\我的文件\myrice\favicon5.ico"));
this.lb = new GListBox();;
this.SuspendLayout();
//
// lb
//
this.lb.ItemHeight = 16;
this.lb.Location = new System.Drawing.Point(10, 10);
this.lb.Name = "listBox1";
this.lb.Size = new System.Drawing.Size(200, 60);
this.lb.TabIndex = 0;
lb.ImageList = imageList;
lb.Items.Add( new GListBoxItem("http://xml.sz.luohuedu.net/",0));
lb.Items.Add( new GListBoxItem("http://lucky.myrice.com/",1));
lb.Items.Add( new GListBoxItem("【孟宪会之精彩世界】",2));
//
// Form1
//
this.AutoScaleBaseSize = new System.Drawing.Size(6, 14);
this.ClientSize = new System.Drawing.Size(292, 160);
this.Controls.Add(this.lb);
this.Text = "带图标的ListBox<a class="channel_keylink" href="http://softtest.chinaitlab.com" target="_blank">测试</a>";
this.Load += new System.EventHandler(this.Form1_Load);
this.ResumeLayout(false);
}
#endregion
/// <summary>
/// 应用程序的主入口点。
/// </summary>
[STAThread]
static void Main()
{
Application.Run(new Form1());
}
private void Form1_Load(object sender, System.EventArgs e)
{
}
// GListBoxItem 类
public class GListBoxItem
{
private string _myText;
private int _myImageIndex;
// 属性
public string Text
{
get {return _myText;}
set {_myText = value;}
}
public int ImageIndex
{
get {return _myImageIndex;}
set {_myImageIndex = value;}
}
//构造函数
public GListBoxItem(string text, int index)
{
_myText = text;
_myImageIndex = index;
}
public GListBoxItem(string text): this(text,-1){}
public GListBoxItem(): this(""){}
public override string ToString()
{
return _myText;
}
}
// GListBox 类
public class GListBox : ListBox
{
private ImageList _myImageList;
public ImageList ImageList
{
get {return _myImageList;}
set {_myImageList = value;}
}
public GListBox()
{
this.DrawMode = DrawMode.OwnerDrawFixed;
}
protected override void OnDrawItem(System.Windows.Forms.DrawItemEventArgs e)
{
e.DrawBackground();
e.DrawFocusRectangle();
GListBoxItem item;
Rectangle bounds = e.Bounds;
Size imageSize = _myImageList.ImageSize;
try
{
item = (GListBoxItem) Items[e.Index];
if (item.ImageIndex != -1)
{
ImageList.Draw(e.Graphics, bounds.Left,bounds.Top,item.ImageIndex);
e.Graphics.DrawString(item.Text, e.Font, new SolidBrush(e.ForeColor),
bounds.Left+imageSize.Width, bounds.Top);
}
else
{
e.Graphics.DrawString(item.Text, e.Font,new SolidBrush(e.ForeColor),
bounds.Left, bounds.Top);
}
}
catch
{
if (e.Index != -1)
{
e.Graphics.DrawString(Items[e.Index].ToString(),e.Font,
new SolidBrush(e.ForeColor) ,bounds.Left, bounds.Top);
}
else
{
e.Graphics.DrawString(Text,e.Font,new SolidBrush(e.ForeColor),
bounds.Left, bounds.Top);
}
}
base.OnDrawItem(e);
}
}
}
}]]>
【责编:Peng】
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