Winforms Combobox SelectedValue is Null

Question

I have a data entry form that had several comboboxes on it. Each of the combo boxes has its own binding source and it is populating correctly when I launch the form. Howev

Answer 1

ComboBox has to have DataSource. Link data though ComboBox1.DataSource

Answer 2

Maybe, you just need to use the SelectedItem, instead!

Answer 3

Are you using a DropDownStyle of DropDown and typing into the ComboBox? If so, that will cause SelectedValue to be null, I'm assuming because the value entered is no longer one of the items in the ComboBox.

If this is the case, set the DropDownStyle to DropDownList, assuming the user has to pick an existing value.