مشكلة فى حفظ اكتر من صنفين عند حفظ الفاتورة

PHP كود :

       If con.State = ConnectionState.Open Then con.Close()
        Dim strInsert As String = " Insert into tb1([Date],[SelMan],[total])values(@Date,@SelMan,@total)"

        cmd = New OleDb.OleDbCommand(strInsert, con)
        cmd.Parameters.Add(New OleDb.OleDbParameter("@Date", OleDb.OleDbType.VarChar)).Value = TextBox1.Text
        cmd.Parameters.Add(New OleDb.OleDbParameter("@SelMan", OleDb.OleDbType.VarChar)).Value = SelMan.Text
        cmd.Parameters.Add(New OleDb.OleDbParameter("@total", OleDb.OleDbType.VarChar)).Value = SelMdataTextBox.Text

        con.Open()

        cmd.ExecuteNonQuery()
        cmd = New OleDb.OleDbCommand("select max(id) from tb1", con)
        Dim dr As OleDb.OleDbDataReader = cmd.ExecuteReader
        dr.Read()
        'اضافة تفاصيل الفاتورة
        Dim ID_tb1 As Integer = dr(0)
        dr.Close()
        Dim code, quant As Integer

        Dim price, total As Double

        strInsert = "Insert into sell(code,ID_tb1,Name,quant,price,total)values(@code,@ID_tb1,@Name,@quant,@price,@total)"
        cmd = New OleDb.OleDbCommand(strInsert, con)

        For i As Integer = 0 To SellDataGridView.RowCount - 2
            code = SellDataGridView.Rows(i).Cells(0).Value
            Name = SellDataGridView.Rows(i).Cells(1).Value
            quant = SellDataGridView.Rows(i).Cells(2).Value
            price = SellDataGridView.Rows(i).Cells(3).Value
            total = SellDataGridView.Rows(i).Cells(4).Value

            cmd = New OleDbCommand(strInsert, con)

            cmd.Parameters.Add(New OleDb.OleDbParameter("@code", OleDb.OleDbType.Integer)).Value = code
            cmd.Parameters.Add(New OleDb.OleDbParameter("[@ID_tb1]", OleDb.OleDbType.Integer)).Value = ID_tb1
            cmd.Parameters.Add(New OleDb.OleDbParameter("[@Name]", OleDb.OleDbType.VarChar)).Value = Name
            cmd.Parameters.Add(New OleDb.OleDbParameter("[@quant]", OleDb.OleDbType.Integer)).Value = quant
            cmd.Parameters.Add(New OleDb.OleDbParameter("[@price]", OleDb.OleDbType.Currency)).Value = price
            cmd.Parameters.Add(New OleDb.OleDbParameter("[@total]", OleDb.OleDbType.Currency)).Value = total

            cmd.ExecuteNonQuery()
            SellDataGridView.Rows.RemoveAt(SellDataGridView.CurrentRow.Index)
        Next
        add_number()
        con.Close()

PHP كود :

       Dim strInsert As String = "Insert into tbl(code,name,Quant,Price,total)values(@code,@name,@Quant,@Price,@total)"

        If con.State = ConnectionState.Open Then con.Close()
        cmd = New OleDbCommand(strInsert, con)
        con.Open()
        For Each Dgrow As DataGridViewRow In dgv.Rows
            cmd.Parameters.Clear()
            If Not Dgrow.IsNewRow Then
                Dim Row As DataRow = DirectCast(Dgrow.DataBoundItem, DataRowView).Row
                If Row IsNot Nothing Then
                    cmd.Parameters.AddWithValue("@code", Convert.ToInt32(Row("code")))
                    cmd.Parameters.AddWithValue("@name", Row("name"))
                    cmd.Parameters.AddWithValue("@Quant", Convert.ToInt32(Row("Quant")))
                    cmd.Parameters.AddWithValue("@Price", Convert.ToDecimal(Row("Price")))
                    cmd.Parameters.AddWithValue("@total", Convert.ToDecimal(Row("total")))

                    cmd.ExecuteNonQuery()

                End If
            End If
        Next
        con.Close() 