Codejock Developer Community : Treeview slow when refreshing its contents http://forum.codejock.com/ Copyright (c) 2006-2013 Web Wiz Forums - All Rights Reserved. Wed, 13 May 2026 14:47:25 +0000 Wed, 06 Jan 2010 12:40:03 +0000 http://blogs.law.harvard.edu/tech/rss Web Wiz Forums 12.04 360 forum.codejock.com/RSS_post_feed.asp?TID=15862 <![CDATA[Codejock Developer Community]]> http://forum.codejock.com/forum_images/codejock-logo.gif http://forum.codejock.com/ <![CDATA[Treeview slow when refreshing its contents : I&#039;m still waiting for 13.2.2...]]> http://forum.codejock.com/forum_posts.asp?TID=15862&PID=56015&title=treeview-slow-when-refreshing-its-contents#56015 Author: Baldur
Subject: 15862
Posted: 06 January 2010 at 12:40pm

I'm still waiting for 13.2.2 now because i have actually no issues ;)]]> Wed, 06 Jan 2010 12:40:03 +0000 http://forum.codejock.com/forum_posts.asp?TID=15862&PID=56015&title=treeview-slow-when-refreshing-its-contents#56015 <![CDATA[Treeview slow when refreshing its contents : do you have last version, it was...]]> http://forum.codejock.com/forum_posts.asp?TID=15862&PID=55983&title=treeview-slow-when-refreshing-its-contents#55983 Author: Oleg
Subject: 15862
Posted: 05 January 2010 at 8:22am

do you have last version, it was minor problem with Clear method but it have to be fixed in 13.2.x]]> Tue, 05 Jan 2010 08:22:37 +0000 http://forum.codejock.com/forum_posts.asp?TID=15862&PID=55983&title=treeview-slow-when-refreshing-its-contents#55983 <![CDATA[Treeview slow when refreshing its contents : I got the same error including...]]> http://forum.codejock.com/forum_posts.asp?TID=15862&PID=55963&title=treeview-slow-when-refreshing-its-contents#55963 Author: Baldur
Subject: 15862
Posted: 04 January 2010 at 4:39am

I got the same error including crash of the application if i often use the clear-method.
It's faster and also save to remove the nodes, but from last node to first node !
Also use in this case the WM_SETREDRAW.
]]> Mon, 04 Jan 2010 04:39:09 +0000 http://forum.codejock.com/forum_posts.asp?TID=15862&PID=55963&title=treeview-slow-when-refreshing-its-contents#55963 <![CDATA[Treeview slow when refreshing its contents : Thank you for the solution...]]> http://forum.codejock.com/forum_posts.asp?TID=15862&PID=55684&title=treeview-slow-when-refreshing-its-contents#55684 Author: od@eureka
Subject: 15862
Posted: 16 December 2009 at 8:11am

 
Thank you for the solution that solves well the response time ...
 
But unfortunately, after several calls of myTreeView.Nodes.Clear(), I have an error code 80010108 ...
 
 --> Is there another way to empty the entire TreeView?
]]> Wed, 16 Dec 2009 08:11:59 +0000 http://forum.codejock.com/forum_posts.asp?TID=15862&PID=55684&title=treeview-slow-when-refreshing-its-contents#55684 <![CDATA[Treeview slow when refreshing its contents : Hi, You can try WM_SETREDRAW...]]> http://forum.codejock.com/forum_posts.asp?TID=15862&PID=55679&title=treeview-slow-when-refreshing-its-contents#55679 Author: Oleg
Subject: 15862
Posted: 16 December 2009 at 5:46am

Hi,
 
You can try WM_SETREDRAW API message:
 
Private Declare Function SendMessage Lib "user32" Alias "SendMessageA" (ByVal hwnd As Long, ByVal wMsg As Long, ByVal wParam As Long, lParam As Any) As Long
Const WM_SETREDRAW = &HB

Private Sub Command1_Click()
SendMessage myTreeView.hwnd, WM_SETREDRAW, 0, 0
myTreeView.Nodes.Clear
        Dim i As Integer
        For i = 1 To 1000
                    myTreeView.Nodes.Add Parent, xtpTreeViewChild, i, "line " & CStr(i), 3
        Next
       
SendMessage myTreeView.hwnd, WM_SETREDRAW, 1, 0
End Sub
 
]]> Wed, 16 Dec 2009 05:46:32 +0000 http://forum.codejock.com/forum_posts.asp?TID=15862&PID=55679&title=treeview-slow-when-refreshing-its-contents#55679 <![CDATA[Treeview slow when refreshing its contents : I have to refresh the contents...]]> http://forum.codejock.com/forum_posts.asp?TID=15862&PID=55655&title=treeview-slow-when-refreshing-its-contents#55655 Author: od@eureka
Subject: 15862
Posted: 15 December 2009 at 10:58am

I have to refresh the contents of a Treeview :
- by default, it show all values (approximativly 1500 nodes)
- when using filters, users can reduce the number of nodes to a subset of 150 or less
 
I do a small test:
 
        myTreeView.Nodes.Clear
        Dim i As Integer
        For i = 1 To 100
                    myTreeView.Nodes.Add Parent, xtpTreeViewChild, i, "line " & CStr(i), 3    
        Next
 
--> it is very slowly the 2nd or more times...(> 4 sec !!!)  How to do to go faster ? (the first time, for 1500 nodes, it takes only 1 sec )
]]> Tue, 15 Dec 2009 10:58:35 +0000 http://forum.codejock.com/forum_posts.asp?TID=15862&PID=55655&title=treeview-slow-when-refreshing-its-contents#55655