how to select all listview items?

Question

how to select all listview items ?

There are many technologies and many types of listview in the C# world: asp.net, winforms, silverlight, wpf. Some more information and/or some code would help. — Steve Danner, Aug 04 '10 at 13:01
Since most of the answers are for winforms, it probably wouldn't hurt anything to just add that tag. — jrh, Jun 07 '18 at 17:09

stuartd · Accepted Answer · 2022-08-24T16:41:13.713

22

If there aren't very many items, this will do it:

foreach (ListViewItem item in myListView.Items)
{
    item.Selected = true;
}

If there are a lot of items, see this answer for how to use LVM_SETITEMSTATE.

edited Aug 24 '22 at 16:41

answered Aug 04 '10 at 13:03

stuartd

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1

What if you have thousands of items? Is there a way of making this approach faster? – Alex Apr 24 '13 at 11:24
1

Calling [LVM_SETITEMSTATE](https://learn.microsoft.com/en-gb/windows/win32/controls/lvm-setitemstate) passing -1 as the index is the low-level way to set all items. – stuartd May 26 '20 at 00:31
@stuartd it would be helpful to post your own answer with C# code to do this rather then posting a vague comment. – HackSlash Jun 03 '20 at 16:57
@stuartd I have no mean intent. I'm saying that your comment could be a good answer and should stand on it's own. The link you provided has some information about C++ so it would be helpful to give an example of how you would use this in C# code. – HackSlash Jun 03 '20 at 17:10
1

OK, sorry. I didn't add it to the question because I've never actually had to use it. There's a C# example at https://stackoverflow.com/a/37146677/43846 though – stuartd Jun 03 '20 at 17:23

score 9 · Answer 2 · answered Oct 30 '13 at 03:10

9

Just pass your listview and checkstate to the function.

public void CheckAllItems(ListView lvw, bool check)
{
    lvw.Items.OfType<ListViewItem>().ToList().ForEach(item => item.Checked = check);
}

answered Oct 30 '13 at 03:10

Chandan Kumar

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This doesn't work when the listview is in virtual mode. How can i achieve this using Virtual Mode? – brighty Sep 23 '15 at 11:39
Wie have our own Each-Extension, but I prefere your Linq solution. It is well readable. – TurmDrummer Mar 16 '17 at 09:35

score 2 · Answer 3 · answered Mar 10 '17 at 16:59

2

for UWP c# this is how I did it.

I have a Listview called, MembersList. to select all members I used the built-in method SellectAll() from the listview class.

The following code worked for me:

MembersList.SellectAll();

answered Mar 10 '17 at 16:59

LAVIUS NKATEKO MOTILENG

31
1

yes you can select all items in the listview with this code in my case i use imagelistview imageListView1.SelectAll(); – Anas Oct 24 '22 at 20:51

score 2 · Answer 4 · edited Jun 21 '17 at 22:50

There is already an accepted answer for this but I use something similar to this:

lv.BeginUpdate();
List<ListViewItem> items = (from i in lv.Items).ToList;
items.ForEach(i => i.Selected == true);
lv.EndUpdate();

It seems to run much faster if there's several thousand items. Also, since we're using BeginUpdate() and EndUpdate(), the ListView control doesn't update after selecting each item.

how to select all listview items?

4 Answers4