如何在ComboBox里面添加图片

Question

本帖最后由 Donecheng520 于 2010-06-23 22:46:02 编辑

Answer 1

http://www.codeproject.com/KB/combobox/ImageComboBoxControl.aspx

Answer 2

C# WinForm控件美化扩展系列之ImageComboBox

Answer 3

.NET自带的ComboBox控件没有添加图片的功能，我们可以自己进行扩展，下面就是扩展类的代码：
类名字：ComboBoxEx.cs代码如下：using System;
using System.Windows.Forms;
using System.Windows.Forms.Design;
using System.Drawing;namespace Mengxianhui.ComboBoxEx
{
  class ComboBoxEx : ComboBox
  {
    private ImageList imageList;
    public ImageList ImageList
    {
      get {return imageList;}
      set {imageList = value;}
    }    public ComboBoxEx()
    {
      DrawMode = DrawMode.OwnerDrawFixed;
    }    protected override void OnDrawItem(DrawItemEventArgs ea)
    {
      ea.DrawBackground();
      ea.DrawFocusRectangle();      ComboBoxExItem item;
      Size imageSize = imageList.ImageSize;
      Rectangle bounds = ea.Bounds;      try
      {
        item = (ComboBoxExItem)Items[ea.Index];        if (item.ImageIndex != -1)
        {
          imageList.Draw(ea.Graphics, bounds.Left, bounds.Top,
            item.ImageIndex);
          ea.Graphics.DrawString(item.Text, ea.Font, new
            SolidBrush(ea.ForeColor), bounds.Left+imageSize.Width, bounds.Top);
        }
        else
        {
          ea.Graphics.DrawString(item.Text, ea.Font, new
            SolidBrush(ea.ForeColor), bounds.Left, bounds.Top);
        }
      }
      catch
      {
        if (ea.Index != -1)
        {
          ea.Graphics.DrawString(Items[ea.Index].ToString(), ea.Font, new
            SolidBrush(ea.ForeColor), bounds.Left, bounds.Top);
        }
        else
        {
          ea.Graphics.DrawString(Text, ea.Font, new
            SolidBrush(ea.ForeColor), bounds.Left, bounds.Top);
        }
      }      base.OnDrawItem(ea);
    }
  }  class ComboBoxExItem
  {
    private string _text;
    public string Text
    {
      get {return _text;}
      set {_text = value;}
    }    private int _imageIndex;
    public int ImageIndex
    {
      get {return _imageIndex;}
      set {_imageIndex = value;}
    }    public ComboBoxExItem()
      : this("") 
    {
    }    public ComboBoxExItem(string text)
      : this(text, -1) 
    {
    }    public ComboBoxExItem(string text, int imageIndex)
    {
      _text = text;
      _imageIndex = imageIndex;
    }    public override string ToString()
    {
      return _text;
    }
  }}
使用方法using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;namespace Mengxianhui.ComboBoxEx
{
/// <summary>
/// Summary description for Form1.
/// </summary>
public class Form1 : System.Windows.Forms.Form
{
    private ComboBoxEx comboBox1;
    private System.ComponentModel.IContainer components; public Form1()
{
//
// Required for Windows Form Designer support
//
InitializeComponent(); //
// TODO: Add any constructor code after InitializeComponent call
//
} /// <summary>
/// Clean up any resources being used.
/// </summary>
protected override void Dispose( bool disposing )
{
if( disposing )
{
if (components != null) 
{
components.Dispose();
}
}
base.Dispose( disposing );
} #region Windows Form Designer generated code
/// <summary>
/// Required method for Designer support - do not modify
/// the contents of this method with the code editor.
/// </summary>
private void InitializeComponent()
{
      ComboBoxEx comboBox1 = new ComboBoxEx();
      ImageList imageList1 = new ImageList();
      imageList1.Images.Add(Image.FromFile(@"D:\favicon.ico"));
      imageList1.Images.Add(Image.FromFile(@"D:\favicon4.ico"));
      imageList1.Images.Add(Image.FromFile(@"D:\favicon5.ico"));
      comboBox1.ImageList = imageList1;      comboBox1.Width = 200;      comboBox1.Items.Add(new ComboBoxExItem("【孟宪会之精彩世界】", 0));
      comboBox1.Items.Add(new ComboBoxExItem("【孟宪会之精彩世界】", 1));
      comboBox1.Items.Add(new ComboBoxExItem("【孟宪会之精彩世界】", 2));
      this.Controls.AddRange(new System.Windows.Forms.Control[] {comboBox1});      // 
      // Form1
      // 
      this.AutoScaleBaseSize = new System.Drawing.Size(6, 14);
      this.ClientSize = new System.Drawing.Size(292, 273);
      this.Controls.AddRange(new System.Windows.Forms.Control[] {comboBox1});
      this.Name = "Form1";
      this.Text = "Form1";
      this.ResumeLayout(false);    }
#endregion /// <summary>
/// The main entry point for the application.
/// </summary>
[STAThread]
static void Main() 
{
Application.Run(new Form1());
     
}
}
代码已经打包了，你可以到这个地址下下来，可以直接使用，不需要注册直接下载即可。
http://kkxxdown.com/rGPPFSAK