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

score 20 · Accepted Answer · answered Aug 04 '10 at 13:03

20

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

answered Aug 04 '10 at 13:03

stuartd

66,195
14
128
158

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://docs.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 8 · Answer 2 · answered Oct 30 '13 at 03:10

8

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 · 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.

score 1 · Answer 4 · answered Mar 10 '17 at 16:59

1

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

21
1

how to select all listview items?

4 Answers4