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List Based Objects
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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
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Overview of Driving Test 2
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How do we Manipulate a List of Data?
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Array Lists Our list of data… Fred Wilma Barney Betty The code…
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The Count Property
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Index Numbers Rather like house numbers BUT ---- Zero bound
Value Index Fred 0 Wilma 1 Barney 2 Betty 3
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RemoveAt Method Value Index Fred 0 Wilma 1 Barney 2 Betty 3
Which record will be removed?
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Changing a List Entry What will the following do?
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Data Tables We said all of that to introduce this…
sproc_tblAddress_SelectAll SELECT * FROM tblAddress
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Middle Layer Code How do we get at the results of the query?
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Data Table Contents
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The Address Page Class clsAddressPage AddressNo HouseNo Town Street
PostCode CountyCode DateAdded Boolean Active
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Copying Data From Data Table to Array
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