I have a combobox with datasource, display member and value member configured (retrieving by data table) and I want to update a data table row in a form. The combobox must be populated and the actual value need to be selected. I try to do it with this.combobox1.SelectValue = DataTableValue but the item not changed. Oh! I forgot to say a important question: I don´t want to use SelectedIndex. I want to select the item by value. Thanks.