Für ein derzeitiges Projekt brauchte ich ein neues Steuerlement, die ImageListBox.
Sie enthält Bilder vor den Listenelementen.

ImageListBox
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C# Quelltext
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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 System.Windows.Forms
{
public class ImageListBox : ListBox
{
public ImageListBox()
{
this.DrawMode = System.Windows.Forms.DrawMode.OwnerDrawFixed;
this.ItemHeight = 16;
}
public Icon getIcon(string file)
{
//gets an file Icon
Icon icon = Icon.ExtractAssociatedIcon(file);
//16x16 px convert
Bitmap icnBmp = new Bitmap(icon.ToBitmap(), 16, 16);
using (Graphics g = Graphics.FromImage(icnBmp))
{
g.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.HighQualityBicubic;
g.DrawImage(icon.ToBitmap(), new Rectangle(0, 0, 16, 16));
}
icon = Icon.FromHandle(icnBmp.GetHicon());
return icon;
}
protected override void OnDrawItem(DrawItemEventArgs e)
{
//testing whether the item is existing or not
if (e.Index >= this.Items.Count || e.Index <= -1) return;
//item object
ImageListBoxItem item = (ImageListBoxItem) this.Items[e.Index];
//checking if item is existing
if (item == null) return;
string text = item.ToString();
SizeF stringSize = e.Graphics.MeasureString(text, this.Font);
e.Graphics.DrawString(text, this.Font, new SolidBrush(Color.Black), new PointF(this.ItemHeight, e.Bounds.Y + (e.Bounds.Height - stringSize.Height) / 2));
e.Graphics.DrawIcon(item.icon, 0, e.Bounds.Top);
}
}
}
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ImageListBoxItem
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C# Quelltext
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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 System.Windows.Forms
{
class ImageListBoxItem
{
public Icon _icon;
public string _text;
public string _path;
public Icon icon
{
get { return _icon; }
set { _icon = value; }
}
public string text
{
get { return _text; }
set { _text = value; }
}
public string path
{
get { return _path; }
set { _path = value; }
}
//constructor
public ImageListBoxItem(string text, Icon icon, string path)
{
_text = text;
_icon = icon;
_path = path;
}
//toString()-Method
public override string ToString()
{
return _text;
}
//returns filepath
public string getPath()
{
return _path;
}
//returns Icon
public Icon getIcon()
{
return _icon;
}
}
}
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Elemente hinzufügen:
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C# Quelltext
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programImageListBox.Items.Add(new ImageListBoxItem(text, programImageListBox.getIcon(pfad), pfad));
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