Vb linq help group by and sum

I trying to do the following in linq


SELECT SUM(qty) AS Expr1, tblOrderDetails_tblProduct, tblOrderDetails_tblOrders
FROM tblOrderDetailsSet
where Planno = 1
GROUP BY tblOrderDetails_tblProduct, tblOrderDetails_tblOrders


Trying to make this work in Linq Please help

Dim dw = Me.Application.CreateDataWorkspace
Dim Query =
From c In dw.ApplicationData.tblOrderDetailsSet _
Where c.PlanNo = 1 _
Order By c.ProductId Ascending _
Group productid By qtytest = c.qty Into qtyTotal = Group
Select New With {.Product = Product, .qty = qtyTotal.Sum()}

here's an example of LINQ grouping, ordering + summing:

Code:

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Public Class Form1

    Dim r As New Random
    Dim products() As String = {"product1", "product2", "product3", "product4", "product5"}

    Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
        Dim tblOrderDetailsSet As New DataTable
        tblOrderDetailsSet.Columns.Add("PlanNo", GetType(Integer))
        tblOrderDetailsSet.Columns.Add("ProductId", GetType(Integer))
        tblOrderDetailsSet.Columns.Add("Product")
        tblOrderDetailsSet.Columns.Add("qty", GetType(Integer))

        For x As Integer = 1 To 100
            tblOrderDetailsSet.Rows.Add(r.Next(1, 4), r.Next(1, 10001), products(r.Next(0, 5)), r.Next(1, 101))
        Next

        Dim Query = _
        From c As DataRow In tblOrderDetailsSet.Rows.Cast(Of DataRow)() _
        Where c.Field(Of Integer)("PlanNo") = 1 _
        Order By c.Field(Of Integer)("ProductId") Ascending _
        Group c By Product = c.Field(Of String)("Product") Into Group _
              Select New With {.Product = Product, .qty = Group.Sum(Function(r As DataRow) r.Field(Of Integer)("qty"))}
        Stop
    End Sub

End Class

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I cant use nomral sql in lightswitch

Quote:

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Originally Posted by jbaillie

I cant use nomral sql in lightswitch

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And? You asked for LINQ solution and you were given a LINQ solution. There's no SQL involved (unless my eye deceive me!)

it's not SQL. it's LINQ to query a datatable, with grouping