How to select checked item in data Grid using linq - vb.net

Question

i have a data grid (using component one's control) and this data grid have a check box value item to select some of the rows, the given below is my grid
i use the check box to select rows for delete or update
at this moment am using for loop to iterate through my grid
i think in .net using linq is more better than for loop
given below is my code to iterate through grid using for loop
Private Sub deleteGtab81()
Dim intcount As Integer
Dim intdistid As Integer
Dim command, commandReader As New NpgsqlCommand
command.Connection = GenConnection()
commandReader.Connection = command.Connection
command.CommandType = CommandType.Text
commandReader.CommandType = CommandType.Text
For intcount = 0 To grdDistricts.Rows.Count - 1
If grdDistricts(intcount, "S").ToString <> "" Then
If grdDistricts(intcount, "S").ToString = 1 Then
intdistid = grdDistricts(intcount, "talukid").ToString()
command.CommandText = "delete from gtab81 where talukid='" & intdistid & "' "
command.ExecuteNonQuery()
End If
End If
Next
grdDistricts.Rows.Clear()
FillGrddistricts()
FillCbodistricts()
End Sub
So how to use linq to get the selected rows ?
NOTE : code is written in vb.net
T.I.A

Answer 1

I've never really tried to use LINQ against a DataGridViewRowCollection, but I suppose you should write something like that:
C#
IList<int> result = (from row in grdDistricts.Rows.OfType<DataGridViewRow>()
where !string.IsNullOrEmpty(row.Cells["S"].Value.ToString()) &&
(int)row.Cells["S"].Value == 1
select (int)row.Cells["talukid"].Value).ToList();
VB.NET
Dim list As IList(Of Integer) = (From row In grdDistricts.Rows.OfType(Of DataGridViewRow)() _
Where Not String.IsNullOrEmpty(row.Cells("S").Value.ToString()) AndAlso _
row.Cells("S").Value = 1 _
Select DirectCast(row.Cells("talukid").Value, Integer)).ToList()
This will select all yours "talukid" and place them in a list.