VB.NET App: CheckedListBox item not showing up as "Checked"

[painkiller]

language: vb.net
environment: windows forms
.net : v1.1

i am having a checkedlistbox control that display document category such as text, image, video, audio etc. these values are coming from database. when a user clicks any of the above values and saves the form, the item's "value" is getting saved in database. and when a user logs back in, his/her previously checked value items should be shown as checked.

Everything is working fine except a checked item is not showing up as checked in the form when i try to do it programmitacally. i know that the code is actually setting the item's checked property to true because itemCheck event gets fired immediately after my code but it just cant show it as checked in the form. here is my vb.net code

sub showCategory()
    dim dt as new datatable
    dt=getDocumentCategory() ' returns doc category as datatable
 
    Dim catarr As New ArrayList
    catarr = getCheckedCategory(userid) 'array of previously checked items
    catarr.TrimToSize()
 
    Me.SuspendLayout()
    clbCategory.DataSource = dt.DefaultView
    clbCategory.DisplayMember = "category_name"
    clbCategory.ValueMember = "id"
    If companyid > 0 Then
           For i As Integer = 0 To clbCategory.Items.Count - 1
               Dim row As DataRowView = clbCategory.Items.Item(i)
               If catarr.IndexOf(row(0)) >= 0 Then
                        clbCategory.SetItemChecked(i, True) '<-- this line is setting the item's checked property to true and itemCheck event is getting fired as it should but windows form is not showing up this item as checked.
                        clbCategory.SetSelected(i, True)
               End If
           Next
    End If
    Me.ResumeLayout()
end sub
 

do you have any idea as to why form is not showing up checkedlistbox's item as "checked" in the final output??

[kenobewan]

Possibly due to postbacks. HTH.

[CyberSoftHari]

You have to post code of this (clbCategory.SetItemChecked(i, True) ) method. we cannot identify what you done in this method!
Suggestion: Do not call a method inside “for” loop just for check an item.

[painkiller]

Possibly due to postbacks. HTH.

there is no postback. i am calling this function on form load.

[painkiller]

You have to post code of this (clbCategory.SetItemChecked(i, True) ) method. we cannot identify what you done in this method!
Suggestion: Do not call a method inside “for” loop just for check an item.

SetItemChecked function is not written by me. its there in checkedlistbox class :)

[CyberSoftHari]

If catarr.IndexOf(row(0)) >= 0 Then 

is this validation is true?

[painkiller]

never mind.......problem solved :)
i put the whole code in form_paint event instead of form_load and its WORKING but cant tell u why. what do u think??

thanx for the responses anyway!