[C#] Import list of the characters in DB to listbox

[someone]

You can simply add it:

Listbox1.Items.Add(item);
or
Listbox1.Items.Insert(index. item)

Another is to put your datasource into your listbox:

DataTable dt = new DataTable();
dt.Load(dbreader);
listBox1.DataSource =dt;
listBox1.DisplayMember = "test_column";