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Kai
275
Infragistic 7.1 Exception when doing calculation...
posted

Hi,

I have assigned a UltraWinCalcManager to a WinGrid to calculate a Weighted Average of a column.

I have set the CalcFrequency to 'Manual'. The calculation is triggered by the following code...

cm.DirtyAllFormulas(); cm.ReCalc(); where cm is a CalcManager.

So my problem is, sometimes when I trigger the calculation, I get the following exception.

<Message>Object reference not set to an instance of an object.</Message>
  <Source>Infragistics2.Win.UltraWinCalcManager.v7.1</Source>
  <HelpLink />
  <Property name="Data">System.Collections.ListDictionaryInternal</Property>
  <Property name="TargetSite">Boolean CleanTopologicalEventQueue(Int64)</Property>

   at Infragistics.Win.CalcEngine.UltraCalcEngine.CleanTopologicalEventQueue(Int64 ticks)
   at Infragistics.Win.CalcEngine.UltraCalcEngine.Recalc(Int64 ticks)
   at Infragistics.Win.UltraWinCalcManager.UltraCalcManager.ReCalcInternal(Int64 ticks)
   at Infragistics.Win.UltraWinCalcManager.UltraCalcManager.ReCalc(Int64 millis)
   at Infragistics.Win.UltraWinCalcManager.UltraCalcManager.ReCalc()

Is this a bug? is there any hot fixes for this?

This does happen randomly since I don't get this everytime.

 

Kai

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  • 25
    posted

    Hi Kai,

    I'm also in the need of calculating a weighted average for several dunamic columns but could not find the formula that did the thing. I finally implemented the ICustomSummaryCalculator to calculate myself the weighted average. I would be intrested to see what formula expression you used to calculate the weighted average with the UltragridCalcmanager. I tried as formula "sum([Quantity]*[Moisture]) / Sum([Quantity]) " but I get an error on that one.

    Michel 

     

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