Placing Images and Strings with a C# Combobox

I was able to come up with some very simple code to perform this (see snippet below). The code creates a control that is a dropdown control which shows a small colored square and that color's name in the same row (see photo). Thanks for the links provided for this back when it was originally posted! Hopefully this control can help someone else out in the future.

Image:

---

Code:

class ColorSelector : ComboBox
{
    public ColorSelector()
    {
        DrawMode = DrawMode.OwnerDrawFixed;
        DropDownStyle = ComboBoxStyle.DropDownList;
    }
 
    // Draws the items into the ColorSelector object
    protected override void OnDrawItem(DrawItemEventArgs e)
    {
        e.DrawBackground();
        e.DrawFocusRectangle();
 
        DropDownItem item = new DropDownItem(Items[e.Index].ToString());
        // Draw the colored 16 x 16 square
        e.Graphics.DrawImage(item.Image, e.Bounds.Left, e.Bounds.Top);
        // Draw the value (in this case, the color name)
        e.Graphics.DrawString(item.Value, e.Font, new
                SolidBrush(e.ForeColor), e.Bounds.Left + item.Image.Width, e.Bounds.Top + 2);
 
        base.OnDrawItem(e);
    }
}
 
public class DropDownItem
{
    public string Value
    {
        get { return value; }
        set { this.value = value; }
    }
    private string value;
 
    public Image Image
    {
        get { return img; }
        set { img = value; }
    }
    private Image img;
 
    public DropDownItem() : this("")
    {}
 
    public DropDownItem(string val)
    {
        value = val;
        this.img = new Bitmap(16, 16);
        Graphics g = Graphics.FromImage(img);
        Brush b = new SolidBrush(Color.FromName(val));
        g.DrawRectangle(Pens.White, 0, 0, img.Width, img.Height);
        g.FillRectangle(b, 1, 1, img.Width - 1, img.Height - 1);
    }
 
    public override string ToString()
    {
        return value;
    }
}

Very helpful.. some optimisations :

public sealed class ColorSelector : ComboBox
{
    public ColorSelector()
    {
        DrawMode = DrawMode.OwnerDrawFixed;
        DropDownStyle = ComboBoxStyle.DropDownList;
    }

    protected override void OnDrawItem(DrawItemEventArgs e)
    {
        e.DrawBackground();

        e.DrawFocusRectangle();

        if (e.Index >= 0 && e.Index < Items.Count)
        {
            DropDownItem item = (DropDownItem)Items[e.Index];

            e.Graphics.DrawImage(item.Image, e.Bounds.Left, e.Bounds.Top);

            e.Graphics.DrawString(item.Value, e.Font, new SolidBrush(e.ForeColor), e.Bounds.Left + item.Image.Width, e.Bounds.Top + 2);
        }

        base.OnDrawItem(e);
    }
}

and ...

public sealed class DropDownItem
{
    public string Value { get; set; }

    public Image Image { get; set; }

    public DropDownItem()
        : this("")
    { }

    public DropDownItem(string val)
    {
        Value = val;
        Image = new Bitmap(16, 16);
        using (Graphics g = Graphics.FromImage(Image))
        {
            using (Brush b = new SolidBrush(Color.FromName(val)))
            {
                g.DrawRectangle(Pens.White, 0, 0, Image.Width, Image.Height);
                g.FillRectangle(b, 1, 1, Image.Width - 1, Image.Height - 1);
            }
        }
    }

    public override string ToString()
    {
        return Value;
    }
}