Thread: Setting the foreground color of a row based on pre-defined conditions.

Using an array to hold the listbox items' status is not a great idea because if you added sorting to the listbox, the listbox items and array could become unsyncronised.

I've gone about things a bit differently, using a simple object to hold the company name as well as it's status so that the 2 items are always together, thus avoiding any unwanted (and unnecessary) complications:

Code:

using System;
using System.Drawing;
using System.Windows.Forms;

namespace WindowsFormsApplication1
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();

            listBox1.DrawMode = DrawMode.OwnerDrawFixed;
            listBox1.DrawItem += new DrawItemEventHandler(listBox1_DrawItem);

            listBox1.Items.Add(new MyObject("ABC Company", Status.Normal));
            listBox1.Items.Add(new MyObject("DEF Company", Status.Active));
            listBox1.Items.Add(new MyObject("GHI Company", Status.Active));
            listBox1.Items.Add(new MyObject("JKL Company", Status.Other));
            listBox1.Items.Add(new MyObject("MNO Company", Status.Normal));
        }

        private void listBox1_DrawItem(object sender, DrawItemEventArgs e)
        {
            Color fore;
            MyObject obj = (MyObject)this.listBox1.Items[e.Index];

            switch (obj.status)
            {
                case Status.Active: // active
                    fore = Color.Red;
                    break;

                case Status.Normal: // normal
                    fore = Color.Blue;
                    break;

                default: // other
                    fore = Color.Gray;
                    break;
            }

            e.Graphics.DrawString(obj.company, e.Font, new SolidBrush(fore), new PointF(e.Bounds.X, e.Bounds.Y));
        }
    }

    public enum Status
    {
        Active = 0,
        Normal = 1,
        Other = 2
    }

    class MyObject
    {
        public Status status;
        public String company;

        public MyObject() { }

        public MyObject(String company, Status status)
        {
            this.company = company;
            this.status = status;
        }
    }
}