[AccessD] ...collections guru?

William Hindman wdhindman at dejpolsystems.com
Wed Feb 17 15:19:56 CST 2010


...thanks JC ...that turned out to be a minor nit in the code ...the real 
problem was that for some bizarre reason the collection didn't treat the 
records as text ...I could count the records in the collection but couldn't 
read them ...Max suggested I load them as a string and that cured the 
problem :)

William

--------------------------------------------------
From: "jwcolby" <jwcolby at colbyconsulting.com>
Sent: Wednesday, February 17, 2010 3:54 PM
To: "Access Developers discussion and problem solving" 
<accessd at databaseadvisors.com>
Subject: Re: [AccessD] ...collections guru?

> collections go from 0 to Col.Count-1
>
> You are going from 1 to Col.count
>
> >         For i = 1 To cName.Count
>
> >>>         For i = 0 To cName.Count-1
>
> John W. Colby
> www.ColbyConsulting.com
>
>
> William Hindman wrote:
>> ...no, I'm not looking for a bill collector :)
>>
>> ...I'm running the following code behind a form.
>> ...the code in InitialzeData runs just fine, no errors, and the displays
>> work.
>> ...the code in InitializeData2 gives an error every time on the line
>> Rose1.AddButton cName(i), "12," & cPolygon(i)
>> ...the difference is of course that one uses a txt file to initialize the
>> collections and the other uses an Access table with the same data
>> ...the nCount in InitializeData2 shows 3 records read as it should
>> ...the error is "Runtime error 3420. Object Invalid or No Longer Set"
>> ...I'm a virgin in trying to code collections ...looking for a guru to 
>> tell
>> me what I'm doing wrong ;)
>>
>> William
>> --------------------------------------------
>> Option Compare Database
>> Option Explicit
>>
>>     Dim cPolygon As New Collection
>>     Dim cName As New Collection
>>     Dim cStatusbar As New Collection
>>     Dim cLabel As New Collection
>>
>>
>> Private Sub Form_Load()
>>
>>     Dim i As Integer
>>
>>     '-----
>>     'Initialize data
>>     'InitializeData
>>     InitializeData2
>>
>>     '-----Add hotspot buttons to map and display
>>     Rose1.BitmapPath = GetAppPath()
>>     'Rose1.SetCustomColorPalette "map_ncal.bmp"
>>     Rose1.Wallpaper = "MBCC_Hall_C_Spring_001.bmp"
>>     'Rose1.Wallpaper = "map_ncal.bmp"
>>     Rose1.StartForm "Form1"
>>         For i = 1 To cName.Count
>>             Rose1.AddButton cName(i), "12," & cPolygon(i)
>>             Rose1.SetButtonStatusbar "", cStatusbar(i)
>>             Rose1.SetButtonLabel "", cLabel(i)
>>         Next
>>     Rose1.EndForm
>>     Rose1.OpenForm "Form1"
>>
>>
>> End Sub
>>
>> Private Sub Form_Unload(Cancel As Integer)
>>
>>     '-----Clear up
>>     Set cPolygon = Nothing
>>     Set cName = Nothing
>>     Set cStatusbar = Nothing
>>     Set cLabel = Nothing
>>
>> End Sub
>>
>> Private Function GetAppPath() As String
>>     'Working variables
>>     Dim sAppPath As String
>>     Dim i As Integer, nLen As Integer, nPos As Integer
>>
>>     sAppPath = Application.DBEngine.Workspaces(0).Databases(0).Name
>>     nLen = Len(sAppPath)
>>     For i = 1 To nLen
>>         If Mid(sAppPath, nLen - i, 1) = "\" Then
>>             nPos = nLen - i
>>             Exit For
>>         End If
>>     Next
>>     sAppPath = Left(sAppPath, nPos - 1)
>>     GetAppPath = sAppPath
>>
>> End Function
>>
>> Private Sub InitializeData()
>>
>>
>>     '-----Hotspot Polygon Data
>>     cPolygon.Add "0238, 75,61,18,18, 75 61 92 61 92 78 75 78 75 61 75 61 
>> 92
>> 61"
>>     cPolygon.Add "0239, 113,61,18,18, 113 61 130 61 130 78 113 78 113 61"
>>     cPolygon.Add "1333, 733,137,18,17, 750 137 750 153 733 153 733 137"
>>
>>     '-----Hotspot button names
>>     cName.Add "0238"
>>     cName.Add "0239"
>>     cName.Add "1333"
>>
>>     '-----Hotspot status bar text
>>     cStatusbar.Add "Booth 0238"
>>     cStatusbar.Add "Booth 0239"
>>     cStatusbar.Add "Booth 1333"
>>
>>
>>     '-----Hotspot button labels
>>     cLabel.Add "0238"
>>     cLabel.Add "0239"
>>     cLabel.Add "1333"
>>
>> End Sub
>> Private Sub InitializeData2()
>>
>>     Dim i As Integer, nCount As Integer
>>     Dim dbs As DAO.Database, rst As DAO.Recordset
>>     Dim strSQL As String
>>
>>     '-----Get data from table
>>     Set dbs = CurrentDb
>>     Set rst = dbs.OpenRecordset("tblFloorPlans")
>>     'strSQL = "SELECT [ID], [RegionName], [Statusbar], [Label], [Polygon]
>> FROM tblFloorPlans;"
>>     'Set rst = dbs.OpenRecordset(strSQL)
>>     rst.MoveLast
>>     nCount = rst.RecordCount
>>     'If nCount > 0 Then
>>       'MsgBox nCount, vbInformation
>>     'End If
>>     rst.MoveFirst
>>
>>     '-----Fill data to collections
>>     For i = 1 To nCount
>>         cName.Add rst!RegionName
>>         cStatusbar.Add rst!Statusbar
>>         cLabel.Add rst!Label
>>         cPolygon.Add rst!Polygon
>>         rst.MoveNext
>>     Next
>>
>>     '-----Close
>>     rst.Close
>>     Set dbs = Nothing
>>
>>
> -- 
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