Binding ListView

Question

Hi.. In my form, I have three combo boxes, one Add button, one Save button and a listview. Step 1:The comboboxes is being populated by a dataset. Step 2: On clicking the add button, the listview should get populated with the contents of the combobox.text. I can repeat Step2 a number of times, each time selecting a different value in the comboBox and adding it to the ListView Step 3: on clicking the Save button, all the data in the listview should be saved in a database. How will I accomplish this the task using the same dataset for both the activities? plz help with code or explanation thanks