No clarity in your question. In which way do u want to retrieve data from database. If you know how to retrieve data from database as a table. Then simply write the below code.
listbox.DataSource = data;//Your data table from database
listbox.DataTextField = "FieldName";//The name of the column in the data table to set text(which is visible)
listbox.DataValueField = "FieldID";//The name of the column in the data table to set value.
listbox.DataBind();// To bind data.
Please show some attempt to solve this yourself. We can answer specific queries, but we aren't really into doing other peoples work/assignments/coursework for them, especially when they put no effort in themselves.