how to set listbox items alternate backcolor

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i m using a listbox control on my windows application , i want to set a alternate backcolor on listbox items , i have tried...

C#

private void listBox2_DrawItem(object sender, DrawItemEventArgs e)
       {
           //bool selected = ((e.State & DrawItemState.Selected) == DrawItemState.Selected);


           int index = e.Index;
           if (index >= 0 && index < listBox2.Items.Count)
           {

               Graphics g = e.Graphics;
               Color color;


                   if (index % 2 == 0)
                   {
                       color = Color.Gray;
                   }
                   else
                   {
                       color = Color.White;
                   }

               /* Draw Background */
               g.FillRectangle(new SolidBrush(color), e.Bounds);

               /* Draw Item Text */
               g.DrawString(listBox2.Items[e.Index].ToString(), e.Font, new SolidBrush(Color.Black), e.Bounds, StringFormat.GenericDefault);

           }
           e.DrawFocusRectangle();
       }

and i see no effect on listbox with this code:
what else i m missing...

Posted 15-Mar-12 2:00am

choudhary.sumit

Updated 16-Jun-22 21:26pm

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Comments

johannesnestler 15-Mar-12 9:04am

Is it possible for you to use a ListView - would be better - same functionality but control over the items...

johannesnestler 15-Mar-12 9:06am

Ah - now I see - for getting your code to work you have to sub-class ListBox and overwrite DrawItem

2 solutions

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Prasad_Kulkarni · Answer 1 · 2012-03-15T02:06:00

Solution 1

Try this:

C#

private static void recolorListItems(ListView lv) {
        for (int i = 0; i < lv.Items.Count; ++i)
         {
            var item = lv.Items[i];
            item.BackColor = (i % 2 == 0) ? Color.Gray : Color.White;
        }
    }

Posted 15-Mar-12 2:06am

Prasad_Kulkarni

v2

Comments

choudhary.sumit 15-Mar-12 8:10am

but i m using listbox not listview...:(

Sakhalean · Answer 2 · 2022-06-16T21:26:00

try this:
 you have to chagne listbox DrawMode property like below

//this.DrawMode = DrawMode.OwnerDrawFixed;

private void listBox1_DrawItem(object sender, DrawItemEventArgs e)
        {
            var item = listBox1.Items[e.Index] as ColoredItem;

            Graphics g = e.Graphics;
            g.FillRectangle(new SolidBrush(Color.LightCyan), e.Bounds);

            if (item != null)
            {
                e.Graphics.DrawString(
                    item.text,
                    e.Font,
                    new SolidBrush(item.color),
                    e.Bounds);
            }
        }