Winform combobox validate for empty string
Posted on 2012-04-05
I have a winform with 4 comboboxes. I used the IDE and "Items" and added the values manually to the combo box. 3 or 4 values in each combobox.
I open the form and nothing is selected. User has to selected something from the combox box. I have checked for "combo.SelectedValue", "combo.text", "combo.selectedtext", and "combo.selectedindex" . But, even when I select something from the dropdown, the values show as blank. I don't have an event or anything. I click a button and want to validate all combo boxes at the same time...
what do i need to do??