คือว่าหนูเลือกรายการเข้ามาที่ Listview แล้วอ่ะค่ะ อยากจะให้มันตัดยอดสินค้าโดยดูจาก id ที่คอลัม แรกอ่ะค่ะ ช่วยหน่อยนะค่ะ

// บันทึกข้อมูลตารางที่ 1  
Dim i As Integer 
                Dim keepnumid As String
                Dim keepPur As String
                Dim keepunit As String
                Dim keeptotal As Double
                Dim sqlInsert As String = ("INSERT INTO Orderby(Numorder,Date,ID_ph,CusID,Total,cash,change) VALUES('" & Me.TextBox9.Text & "','" & Me.DateTimePicker1.Value.ToString("s") & "','" & Me.TextBox10.Text & "','" & Me.TextBox11.Text & "','" & Me.TextBox6.Text & "','" & Me.TextBox7.Text & "','" & Me.TextBox8.Text & "')")
                Dim objConn As New SqlConnection(Conectionstring)
                Dim objCmd As New SqlCommand(sqlInsert, objConn)
                objConn.Open()
                objCmd.ExecuteNonQuery()
                For i = 0 To ListView1.Items.Count - 1
                    keepnumid = CStr(ListView1.Items(i).SubItems(0).Text)
                    keepPur = CInt(ListView1.Items(i).SubItems(4).Text)
                    keepunit = CStr(ListView1.Items(i).SubItems(5).Text)
                    keeptotal = CDbl(ListView1.Items(i).SubItems(6).Text)

 // บันทึกข้อมูลตารางที่ 2
                    Dim sqlInsert2 As String = ("INSERT INTO Dtail(Numorder,ID_Durg,Purchase,Unit,Induded) VALUES('" & Me.TextBox9.Text & "' , '" & keepnumid & "', '" & keepPur & "','" & keepunit & "', '" & keeptotal & "')")

                    Dim objCmd2 As New SqlCommand(sqlInsert2, objConn)

                    objCmd2.ExecuteNonQuery()

            Next

     //การตัดสต๊อก      

            For i = 0 To ListView1.Items.Count - 1
                Dim Upstock As String = ""
                Upstock = ("Update Durg")
                Upstock &= (" set quantity = quantity- " & ListView1.Items(i).SubItems(4).Text & " where ID_Durg = ")
                With objCmd
                    .CommandType = CommandType.Text
                    .CommandText = Upstock
                    .Connection = cn
                    .Parameters.Clear()
                    .Parameters.Add("ID_Durg", SqlDbType.Int).Value = ListView1.Items(i).SubItems(0).Text
                    .ExecuteNonQuery()
                End With
            Next