How to add data from database using Petapoco to combobox with value
saleIDComboBox.DataSource = db.Query<sale>("SELECT * FROM sale").ToList();
saleIDComboBoxx.SelectedValue = xx.Supplier_ID;
// Set combobox Data > DataSource, DisplayMember, ValueMember in designer
// For Autocomplete Choose Autocompletemode = Suggest Append, AutocompleteSource = ListItems