VB.net 2005 (.net 2.0) - Group By DataTable

I need to Filter / Group By a DataTable
I need to be able to do a Select Account Number = 1111 and then Group those results by the Product Code

How can I Filter a DataTable and Group the Results?

This is an example...but it doesn't work...
Dim foundRows() As DataRow = DE_ProductCodes.Select("AccountNum = " & AcctNum.Text & " group by ProductCode")

Thanks,
Mark
smithmrkAsked:
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Russ SuterCommented:
You can use the DataView class to select your rows then apply a little logic to get the grouping to work.

Public Function GroupBy(i_sGroupByColumn As String, i_sAggregateColumn As String, i_dSourceTable As DataTable) As DataTable

	Dim dv As New DataView(i_dSourceTable)

	'getting distinct values for group column
	Dim dtGroup As DataTable = dv.ToTable(True, New String() {i_sGroupByColumn})

	'adding column for the row count
	dtGroup.Columns.Add("Count", GetType(Integer))

	'looping thru distinct values for the group, counting
	For Each dr As DataRow In dtGroup.Rows
		dr("Count") = i_dSourceTable.Compute((Convert.ToString("Count(") & i_sAggregateColumn) + ")", (i_sGroupByColumn & Convert.ToString(" = '")) + dr(i_sGroupByColumn) + "'")
	Next

	'returning grouped/counted result
	Return dtGroup
End Function

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smithmrkAuthor Commented:
Sorry I didn't back to you sooner!

Thanks,
Mark
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