Question

I need to add a new item to a windows form application combo box without touching the datasource, like we add it in a web application, using Items.Insert(index, newItem).

Thanks

Answer 1

I would think this would do the trick – after you bind the data source to the ComboBox, add the additional items:

CombBox1.Items.Insert(0, "New Item");

Are you having problems getting that to work?

EDIT
Did some research via google – turns out you can’t add items after the ComboBox is databound. You have to add the items to the datasource itself. For example, say you’re binding a DataTable to the ComboBox, with the DisplayMember set to column 1 and the ValueMember set to column 0:

DataRow newRow = myDataTable.NewRow();

newRow[0] = "0";
newRow[1] = "aa";

myDataTable.Rows.InsertAt(newRow, 0);

cb1.DataSource = myDataTable;