Add items in ListBox with different colors

Question

How to add items with different color in ListBox control?This code for example change the colors of all items in the ListBox.
Obviously i do not want that.

Code Block

this.listBox1.DrawItem += new DrawItemEventHandler(this.DrawItemHandler);

   private void DrawItemHandler(object sender, DrawItemEventArgs e)
        {
            e.DrawBackground();
            e.DrawFocusRectangle();
            e.Graphics.DrawString(someString,
                                  new Font(FontFamily.GenericSansSerif,
                                           8, FontStyle.Bold),
                                           new SolidBrush(tColor),e.Bounds);
        }

How to achieve what i want?AFAIK i should remove e.Bounds and play with e.Index or something...but don't know what to do exactly.Thanks in advance.

Answer 1

 

Hi cygnusx,

To set different color for each item in the ListBox, please check the following sample.

Code Block

namespace ListBox

{

    public partial class ColoredLB : Form

    {

        public ColoredLB()

        {

            InitializeComponent();

        }

 

        private void ColoredLB_Load(object sender, EventArgs e)

        {

            this.listBox1.Items.AddRange(new object[] { "Red", "Blue", "Yellow","Other Color" });

            this.listBox1.DrawMode = DrawMode.OwnerDrawVariable;

            this.listBox1.DrawItem += new DrawItemEventHandler(listBox1_DrawItem);

        }

 

        void listBox1_DrawItem(object sender, DrawItemEventArgs e)

        {

            e.DrawBackground();

            e.DrawFocusRectangle();

            Color c = Color.Pink;

            if (this.listBox1.Items[e.Index].ToString() == "Red")

                c = Color.Red;

            else if (this.listBox1.Items[e.Index].ToString() == "Blue")

                c = Color.Blue;

            else if (this.listBox1.Items[e.Index].ToString() == "Yellow")

                c = Color.Yellow;

            e.Graphics.DrawString(this.listBox1.Items[e.Index].ToString(), new Font(FontFamily.GenericSansSerif, 8, FontStyle.Bold), new SolidBrush(c), e.Bounds);

        }

    }

}

 

Hope this helps.
Best regards.
Rong-Chun Zhang

Answer 2

I am trying this code below, and it's obviously not doing what I want.

I have set the drawmode on formload.

I am adding one item at a time, not add range. But I don't think this should make a difference.

Any ideas?

    private void lbChanUsers_DrawItem(object sender, DrawItemEventArgs e)

        {

            e.DrawBackground();

            e.DrawFocusRectangle();

            Color c = Color.Black;

            if (this.lbChanUsers.Items[e.Index].ToString().IndexOf("@") < 0)

                return;

            if (this.lbChanUsers.Items[e.Index].ToString().IndexOf("@") >= 0)

                c = Color.Blue;

             if (this.lbChanUsers.Items[e.Index].ToString().IndexOf("+") >= 0)

                 c = Color.Maroon;

             this.lbChanUsers.Items[e.Index] = (string)this.lbChanUsers.Items[e.Index].ToString().Substring(1);

             e.Graphics.DrawString(this.lbChanUsers.Items[e.Index].ToString(), lbChanUsers.Font, new SolidBrush(c), e.Bounds);

        }

---

foxjazz