I provides combobox2 which is need the study of part1,then you can understand this parts.I provides different way to understand it using database.You can see it using Download it.
In this video there a combobox which need retreive data from database.There is basic scheme to create a DatabaseHelper.There is also supports to edit,insert and delete data of combobox.There is need object of datatable need.
There is need to check there is record are edit or insert.Then operates it in database.There is need to combobox data are retrieve from database.There is need to open and close connection in the load page.There is sqlcommand object to retrieve query from the store procedure.The datatable dt are used for execute query.
Combobox have more data at a time.You can only select one at a time.Combox is used for retrieve using data from database.Database need also one column status code,either active or deactive.Combobox is select based on the index using count.
Note: You should new extra player as WEBEX recording and player
