select all listview items

[marvinklein]

i have a listview with about 500 items.
when i do
for each item in listview.items
item.selected = true
next

it is very very slow to do that and sometimes crashes the app. what is so inefficient about about this that makes this unwanted behaviour? and is there a better way to select all 500 items?
thanks...

[pax]

Hi

That's strange. I just tried it on mine and it only took 30 msec's.
And I don't think there's any other way...Not that I know of, anyway.

Dim A As Integer = Environment.TickCount
Dim li As ListViewItem
 
For Each li In ListView1.Items
    li.Selected = True
Next
 
MsgBox(Environment.TickCount - A)

Perhaps it would help if you added a BeginUpdate and an EndUpdate? (Although it didn't do anything for me!)

Dim A As Integer = Environment.TickCount
Dim li As ListViewItem
 
ListView1.BeginUpdate
For Each li In ListView1.Items
    li.Selected = True
Next
ListView1.EndUpdate
MsgBox(Environment.TickCount - A)