[02/03] Determine If Invoce Posted > Quarters ago

I need to determine if an invoice date was posted more than 2 quarters ago.
If so, then the account is Inactive

This is how I did it:

Code:

---

        Private Function sSetInactive(ByVal InvoiceDate As Date) As Boolean
            ' return TRUE is older than 2 Quarters, else FALSE

            Dim QuarterStart As Date

            ' get start date of current quarter
            QuarterStart = DateAdd(DateInterval.Quarter, DateDiff(DateInterval.Quarter, Date.MinValue, Today()), Date.MinValue)

            ' get start date 1 quarter ago
            QuarterStart = DateAdd(DateInterval.Quarter, DateDiff(DateInterval.Quarter, Date.MinValue, DateAdd(DateInterval.Day, -1, QuarterStart)), Date.MinValue)

            ' get start date 2 quarters ago
            QuarterStart = DateAdd(DateInterval.Quarter, DateDiff(DateInterval.Quarter, Date.MinValue, DateAdd(DateInterval.Day, -1, QuarterStart)), Date.MinValue)

            If InvoiceDate < QuarterStart Then
                Return True
            Else
                Return False
            End If

        End Function

---

It seems like a kind of convoluted approach, but it seems to work. Anyone have a more elligant way of doing it?

Once you've got the start date of the current quarter you can simply AddMonths(-6) to get the start date two quarters ago. Also, a much more succinct way to do this:

vb.net Code:

If InvoiceDate < QuarterStart Then
                Return True
            Else
                Return False
            End If

is this:

vb.net Code:

Return InvoiceDate < QuarterStart