Picking row value dynamically with an additional action

[ppr (Peter Preuss)]

grouping data can help after filling up

as described here

[HowTo] Overview on different options for grouping data and processing the groups

This HowTo introduces on the different options for grouping data from a datatable in order to process the grouped data. Introduction Grouping data and processing the grouped data is a common scenario e.g. when the grouped data is to aggregate like summing up, find maximum, get the average or concatening items. Lets have a look on following data: [grafik] A possible scenario could be: Create a report containing following information: the region code the sum of CaseCount per RegionCode t…

or a dictionary approach like this

done with:

(From d In dtData.AsEnumerable
Group d By k=d(0).toString Into grp=Group
Let v=grp.Select(Function (x) x(1).toString).toArray
Select t=Tuple.Create(k,v)).ToDictionary(Function (t) t.Item1, Function (t) t.Item2)