protected override void DataPortal_Update()
        {
            bool cancel = false;
            OnUpdating(ref cancel);
            if (cancel) return;

            if(OriginalSuppId != SuppId)
            {
                // Insert new child.
                Supplier item = new Supplier {SuppId = SuppId, Name = Name, Status = Status, Addr1 = Addr1, Addr2 = Addr2, City = City, State = State, Zip = Zip, Phone = Phone};
                
                item = item.Save();

                // Mark editable child lists as dirty. This code may need to be updated to one-to-one relationships.
                foreach(Item itemToUpdate in Items)
                {
                itemToUpdate.Supplier = SuppId;
                }

                // Create a new connection.
                using (var connection = new SqlConnection(ADOHelper.ConnectionString))
                {
                    connection.Open();
                    FieldManager.UpdateChildren(this, connection);
                }

                // Delete the old.
                var criteria = new SupplierCriteria {SuppId = OriginalSuppId};
                
                DataPortal_Delete(criteria);

                // Mark the original as the new one.
                OriginalSuppId = SuppId;

                OnUpdated();

                return;
            }

            const string commandText = "UPDATE [dbo].[Supplier] SET [SuppId] = @p_SuppId, [Name] = @p_Name, [Status] = @p_Status, [Addr1] = @p_Addr1, [Addr2] = @p_Addr2, [City] = @p_City, [State] = @p_State, [Zip] = @p_Zip, [Phone] = @p_Phone WHERE [SuppId] = @p_OriginalSuppId; SELECT [SuppId] FROM [dbo].[Supplier] WHERE [SuppId] = @p_OriginalSuppId";
            using (var connection = new SqlConnection(ADOHelper.ConnectionString))
            {
                connection.Open();
                using(var command = new SqlCommand(commandText, connection))
                {
                    command.Parameters.AddWithValue("@p_OriginalSuppId", this.OriginalSuppId);
                command.Parameters.AddWithValue("@p_SuppId", this.SuppId);
                command.Parameters.AddWithValue("@p_Name", ADOHelper.NullCheck(this.Name));
                command.Parameters.AddWithValue("@p_Status", this.Status);
                command.Parameters.AddWithValue("@p_Addr1", ADOHelper.NullCheck(this.Addr1));
                command.Parameters.AddWithValue("@p_Addr2", ADOHelper.NullCheck(this.Addr2));
                command.Parameters.AddWithValue("@p_City", ADOHelper.NullCheck(this.City));
                command.Parameters.AddWithValue("@p_State", ADOHelper.NullCheck(this.State));
                command.Parameters.AddWithValue("@p_Zip", ADOHelper.NullCheck(this.Zip));
                command.Parameters.AddWithValue("@p_Phone", ADOHelper.NullCheck(this.Phone));

                    //result: The number of rows changed, inserted, or deleted. -1 for select statements; 0 if no rows were affected, or the statement failed. 
                    int result = command.ExecuteNonQuery();
                    if (result == 0)
                        throw new DBConcurrencyException("The entity is out of date on the client. Please update the entity and try again. This could also be thrown if the sql statement failed to execute.");

                    LoadProperty(_originalSuppIdProperty, this.SuppId);
                }

                FieldManager.UpdateChildren(this, connection);
            }

            OnUpdated();
        }
        private void Child_Update(Product product, Supplier supplier, SqlConnection connection)
        {
            bool cancel = false;
            OnChildUpdating(product, supplier, connection, ref cancel);
            if (cancel) return;

            if(connection.State != ConnectionState.Open) connection.Open();
            const string commandText = "UPDATE [dbo].[Item] SET [ItemId] = @p_ItemId, [ProductId] = @p_ProductId, [ListPrice] = @p_ListPrice, [UnitCost] = @p_UnitCost, [Supplier] = @p_Supplier, [Status] = @p_Status, [Name] = @p_Name, [Image] = @p_Image WHERE [ItemId] = @p_OriginalItemId; SELECT [ItemId] FROM [dbo].[Item] WHERE [ItemId] = @p_OriginalItemId";
            using(var command = new SqlCommand(commandText, connection))
            {
                command.Parameters.AddWithValue("@p_OriginalItemId", this.OriginalItemId);
                command.Parameters.AddWithValue("@p_ItemId", this.ItemId);
                command.Parameters.AddWithValue("@p_ProductId", product != null ? product.ProductId : this.ProductId);
                command.Parameters.AddWithValue("@p_ListPrice", ADOHelper.NullCheck(this.ListPrice));
                command.Parameters.AddWithValue("@p_UnitCost", ADOHelper.NullCheck(this.UnitCost));
                command.Parameters.AddWithValue("@p_Supplier", ADOHelper.NullCheck(supplier != null ? supplier.SuppId : this.Supplier));
                command.Parameters.AddWithValue("@p_Status", ADOHelper.NullCheck(this.Status));
                command.Parameters.AddWithValue("@p_Name", ADOHelper.NullCheck(this.Name));
                command.Parameters.AddWithValue("@p_Image", ADOHelper.NullCheck(this.Image));

                // result: The number of rows changed, inserted, or deleted. -1 for select statements; 0 if no rows were affected, or the statement failed. 
                int result = command.ExecuteNonQuery();
                if (result == 0)
                    throw new DBConcurrencyException("The entity is out of date on the client. Please update the entity and try again. This could also be thrown if the sql statement failed to execute.");

                // Update foreign keys values. This code will update the values passed in from the parent only if no errors occurred after executing the query.
                if(product != null && product.ProductId != this.ProductId)
                    LoadProperty(_productIdProperty, product.ProductId);

                // Update foreign keys values. This code will update the values passed in from the parent only if no errors occurred after executing the query.
                if(supplier != null && supplier.SuppId != this.Supplier)
                    LoadProperty(_supplierProperty, supplier.SuppId);

                // Update non-identity primary key value.
                LoadProperty(_originalItemIdProperty, this.ItemId);
            }
            
            // A child relationship exists on this Business Object but its type is not a child type (E.G. EditableChild). 
            // TODO: Please override OnChildUpdated() and update this child manually.
            // FieldManager.UpdateChildren(this, connection);

            OnChildUpdated();
        }
 private void Child_Update(Supplier supplier, SqlConnection connection)
 {
     Child_Update(null, supplier, connection);
 }
 private void Child_Insert(Supplier supplier, SqlConnection connection)
 {
     Child_Insert(null, supplier, connection);
 }
 private void Child_Update(Supplier supplier, SqlConnection connection)
 {
     Child_Update(null, supplier, connection);
 }
 private void Child_Insert(Supplier supplier, SqlConnection connection)
 {
     Child_Insert(null, supplier, connection);
 }