Hi there, I have a DataGridView with a BindingSource of products. This products have an enum (Producer). For the most text fields (to edit the product) below the DataGridView I have a method RefreshProduct which does a ResetBindings in the end to refresh the DataGridView. There is a ComboBox (cboProducer), too. If I run over the _orderBs.ResetBindings(false) it will reset my cboProducer outside the DataGridView, too. Could you please help me to avoid this? Here follows some code; maybe it is then better to understand. public partial class SelectProducts : UserControl { private AutoCompleteStringCollection _productCollection; private ProductBL _productBL; private OrderBL _orderBL; private SortableBindingList<ProductBE> _listProducts; private ProductBE _selectedProduct; private OrderBE _order; BindingSource _orderBs = new BindingSource(); public SelectProducts() { InitializeComponent(); if (_productBL == null) _productBL = new ProductBL(); if (_orderBL == null) _orderBL = new OrderBL(); if (_productCollection == null) _productCollection = new AutoCompleteStringCollection(); if (_order == null) _order = new OrderBE(); if (_listProducts == null) { _listProducts = _order.ProductList; _orderBs.DataSource = _order; grdOrder.DataSource = _orderBs; grdOrder.DataMember = "ProductList"; } } private void cmdGetProduct_Click(object sender, EventArgs e) { ProductBE product = _productBL.Load(txtProductNumber.Text); _listProducts.Add(product); _orderBs.ResetBindings(false); } private void grdOrder_SelectionChanged(object sender, EventArgs e) { if (grdOrder.SelectedRows.Count > 0) { _selectedProduct = (ProductBE)((DataGridView)(sender)).CurrentRow.DataBoundItem; if (_selectedProduct != null) { txtArticleNumber.Text = _selectedProduct.Article; txtPrice.Text = _selectedProduct.Price.ToString("C"); txtProducerNew.Text = _selectedProduct.ProducerText; cboProducer.DataSource = Enum.GetValues(typeof(Producer)); cboProducer.SelectedItem = _selectedProduct.Producer; } } } private void txtProducerNew_Leave(object sender, EventArgs e) { string property = CommonMethods.GetPropertyName(() => new ProductBE().ProducerText); RefreshProduct(((TextBoxBase)sender).Text, property); } private void RefreshProduct(object value, string property) { if (_selectedProduct != null) { double valueOfDouble; if (double.TryParse(value.ToString(), out valueOfDouble)) { value = valueOfDouble; } Type type = _selectedProduct.GetType(); PropertyInfo info = type.GetProperty(property); if (info.PropertyType.BaseType == typeof(Enum)) { value = Enum.Parse(info.PropertyType, value.ToString()); } try { Convert.ChangeType(value, info.PropertyType, new CultureInfo("de-DE")); info.SetValue(_selectedProduct, value, null); } catch (Exception ex) { throw new WrongFormatException("\"" + value.ToString() + "\" is not a valid value.", ex); } var produktFromList = _listProducts.Single(p => p.Position == _selectedProduct.Position); info.SetValue(produktFromList, value, null); _orderBs.ResetBindings(false); } } private void cboProducer_SelectedIndexChanged(object sender, EventArgs e) { var selectedIndex = ((ComboBox)(sender)).SelectedIndex; switch ((Producer)selectedIndex) { case Producer.ABC: txtProducerNew.Text = Constants.ABC; break; case Producer.DEF: txtProducerNew.Text = Constants.DEF; break; case Producer.GHI: txtProducerNew.Text = Constants.GHI; break; case Producer.Another: txtProducerNew.Text = String.Empty; break; default: break; } string property = CommonMethods.GetPropertyName(() => new ProductBE().Producer); RefreshProduct(selectedIndex, property); } }