LINQ Query to find the first different instances of rows from DT

[ppr (Peter Preuss)]

looks like we do it with a group by

Assign activity
LHS: dtResult| datatype: DataTable
RHS

(From d in dtData.AsEnumerable
Group d by k=d("Category").toString.Trim into grp=Group
Where Not k.Equals("cat1")
Select r = grp.First()).CopyToDataTable

[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…