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  #1  
Old 17-10-2008
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Join Date: Feb 2006
Posts: 99
limits on listview

Hello, Can anyone please tell me what is the limits on listview's # of rows and columns? Thanks in advance.
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  #2  
Old 17-10-2008
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Join Date: Jun 2006
Posts: 620
Here is the code i'm using. Sorry should have mentioned this earlier as there are 1612 rows inserted my listview but the following line failes at 1363 each time I run it.

LItem = listMessages.Items(i)


Code:
Dim i As Integer
            Dim LItem As ListViewItem
            Dim intIndex As Integer

            For i = 0 To listMessages.Items.Count - 1

                LItem = listMessages.Items(i)
                If LItem.Checked = True Then
                    intIndex = LItem.Index
                    txtStatus.Text = txtStatus.Text & "REMOVING: " & LItem.Text & vbCrLf

                    '## Delete Email ##
                    inbox.DeleteMessage(CInt(LItem.Text), True)

                    '## Delete from listMessages ##
                    LItem.Remove()
                End If

            Next
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  #3  
Old 17-10-2008
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Join Date: Dec 2007
Posts: 1,592
Loading a listview with a million items at a time may at the very minimum take a very long time to load providing it doesn't crash.

You problably should only load the minimum necessary items This is possible with virtual list view using a LVS_OWNERDATA style. Virtual list view does not store information on its items. Instead it stores the number of items in the list. When virtual list view is redrawn it requests only the information on the items actually visible on the screen.

Also, if memory serves me correctly, there is a 64k limit on the standard Win32 listview control. So, the only way you would possibly handle a million items is to use the virtual listview.
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  #4  
Old 17-10-2008
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Join Date: Dec 2007
Posts: 1,728
It is 32767, it's the highest positive value of a signed 16-bit integer and this was tested with no columns.
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