Public Function sumByPriceList(ByVal startTime As Date, ByVal endTime As Date) As Single 'Getting PricelistHours Dim pricelistCollection As DataTable = getPriceListCollection() Dim cost As Double Dim tempEntryTime As DateTime = startTime Dim dr As DataRow While tempEntryTime < endTime For i As Integer = 0 To pricelistCollection.Rows.Count - 1 dr = pricelistCollection.Rows(i) Dim entryTime As DateTime = dr("FromHour") Dim exitTime As DateTime = dr("ToHour") If (tempEntryTime.Hour >= startTime.Hour And endTime.Hour >= exitTime.Hour) Then cost += CalcPrice(tempEntryTime, exitTime) tempEntryTime = exitTime ElseIf (tempEntryTime.Hour >= entryTime.Hour And endTime.Hour < exitTime.Hour) Then cost += CalcPrice(tempEntryTime, endTime) tempEntryTime = endTime End If Next End While Return cost End Function
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