How to show icon on all listview items in virtual mode (C#)

Question

I'm using virtual mode of listview to show a larg data. But I don't know how to show image for each item. Who can help me ?

I wrote

private void ListContact_RetrieveVirtualItem(object sender, RetrieveVirtualItemEventArgs e)
    {
        MyContact contact = ContactData.GetMyContact(e.ItemIndex);
        if (e.Item == null) e.Item = new ListViewItem(contact.ToString());
        if (contact.Photo != null)
        {
            e.Item.ImageList.Images.Add("" + contact.Id, contact.Photo);
            e.Item.ImageKey = "" + contact.Id;
        }
        else
        {
            e.Item.ImageKey = "default";
        }
    }

But it don't work properly

What is error message? And possible you should look this question http://stackoverflow.com/questions/2525828/how-do-i-add-remove-items-to-a-listview-in-virtual-mode — Soner Gönül, Apr 19 '11 at 05:58
private void ListContact_DrawItem(object sender, DrawListViewItemEventArgs e) { e.DrawDefault = true; } — Võ Quang Hòa, Apr 19 '11 at 06:02

score 8 · Accepted Answer · answered Apr 19 '11 at 06:30

8

This seems to be a bug in the .NET Framework (that's been marked as Won't fix). You might want to check this out. The solution would be to use ImageIndex instead of ImageKey.

answered Apr 19 '11 at 06:30

alex

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1

Thanks you. I have just tested and result is successfull. – Võ Quang Hòa Apr 19 '11 at 07:30
1

@VõQuangHòa: Glad I could help. If this solved your problem, please mark the answer as accepted. – alex Apr 19 '11 at 08:45
I have just read this rule from faq. But I'm sorry, I can't see "accepted answer" any where. Please help me. Thanks you – Võ Quang Hòa Apr 19 '11 at 15:06
1

Source link is now dead (good job Microsoft, sigh) so whatever background information it contained is lost but the answer of using `ImageIndex` over `ImageKey` is still valid 6 years on having just been bitten by the exact same issue. – Richard Moss Mar 10 '18 at 13:03
@RichardMoss Just like the classic **_This thread has been closed as of 26/Oct/2009_** – Sreenikethan I Jan 30 '19 at 16:24

How to show icon on all listview items in virtual mode (C#)

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