List Based Objects

The Story so far System split into layers – maintainability & re-use Database – stored procedures, tables, rows, columns & parameters Range of objects allowing us to control different parts of the computer using their methods & properties Variables – RAM Controls – Interface DataConnection class – database Introduced a lot of coding concepts, assignment, sequence, selection, validation, functions, parameters to name a few

Overview of Driving Test 2

How do we Manipulate a List of Data?

Array Lists Our list of data… Fred Wilma Barney Betty The code…

The Count Property

Index Numbers Rather like house numbers BUT ---- Zero bound Value Index Fred 0 Wilma 1 Barney 2 Betty 3

RemoveAt Method Value Index Fred 0 Wilma 1 Barney 2 Betty 3 Which record will be removed?

Changing a List Entry What will the following do?

Data Tables We said all of that to introduce this… sproc_tblAddress_SelectAll SELECT * FROM tblAddress

Middle Layer Code How do we get at the results of the query?

Data Table Contents

The Address Class

Copying Data From Data Table to Array