OL2000: Restrict May Not Work with Uncached Properties

• Microsoft Outlook 2000

SYMPTOMS

You use the Restrict and IncludeRecurrences methods in the Outlook object model and Outlook appears to stop responding (hang), or the collection of items does not appear to be functioning correctly.

CAUSE

This may happen if all of the following are true:

• You have items that recur and do not have an end date.
• In the filter of the Restrict method, you did not specify an end date, so the number of items in the collection is infinite.
• In the filter of the Restrict method, you used a property that Outlook does not cache by default.

RESOLUTION

Use one of the following workarounds:

• Use the SetColumns method to cache the property you wish to use Restrict on. As an example, uncomment the SetColumns line in the "Steps to Reproduce the Problem" section below.



• Alter the filter of the Restrict method so that the method will not return an infinite collection.

MORE INFORMATION

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Steps to Reproduce the Problem

1. Create a new Calendar folder.



2. Create three recurring appointments with a start date of 3/14/99.



3. On two of the appointments, set the Mileage field to Test. The Mileage field does not appear on the default appointment form, but you can use the Field Chooser to add the field to a table view and then use the in-cell editing feature to set the value.



4. With the Calendar folder selected, create a reference to the Microsoft Outlook 9.0 Object Library and run the following Visual Basic Automation code:




Sub RestrictTest()
    Dim outapp As Outlook.Application
    Dim itms As Outlook.Items
    Dim itmsR As Outlook.Items
    Dim itm As Outlook.AppointmentItem
    Dim strQ As String
    Set outapp = New Outlook.Application
    Set itms = outapp.ActiveExplorer.CurrentFolder.Items
    itms.IncludeRecurrences = True
    itms.Sort "[Start]"
    strQ = "[Mileage] = 'test'"
    Set itmsR = itms.Restrict(strQ)
    'itmsR.SetColumns "Mileage"
    For Each itm In itmsR
        If itm.Start > #6/1/1999# Then Exit For
        Debug.Print itm.Subject & " : " & itm.Start & " : " & itm.Mileage
    Next
End Sub 

REFERENCES

For additional information about available resources and answers to commonly asked questions about Microsoft Outlook 2000 solutions, please see the following article in the Microsoft Knowledge Base:

Q146636 OL2000: Questions About Custom Forms and Outlook Solutions

Additional query words: OL2K OutSol OutSol2000 vbscript

Keywords : kbdta
Version : WINDOWS:2000
Platform : WINDOWS
Issue type : kbprb