(Visual Basic) Demo of an "Array of Records"

Version

and

link

Changes

1.5.0

v1.5.0 - Four hard coded records, then the entry of further records checks the code for the "Array of Records"

1.6.0

2 additional fields are added and the tab order is checked.

1.6.1

The label for "Paid" was changing to false rather than the checkbox! Now fixed.

1.7.0

Form re-organised so that the tab order makes sense. 1st attempt at validation on gender.

1.7.1

Gender validation had an error

1.7.4

There are still bugs in this validation - can you find them??

1.7.5

Validation on "Submit" started

1.7.6

Validation on exit of each field as well as on submit. A date picker for DoB with default of 1/1/2003

1.7.7

Minor corrections to format - validation now on field exit and on submit

1.8.1

Find working, but 3 errors in the search algorithm:

• First record never found
• Search is CASE sensitive
• Only the first of multiple records found

1.8.2

Infinite loop version - this is what DEVELOPERS DO NOT DO!

• Changed increment code for "Find" from:
• searchCount = searchCount  + 1  to
• searchCount = searchCount

1.8.3

Added 8 extra test records.

Learning to use the list box:

• Added text boxes to view list box elements clicked and the index of the element
• Added a module triggered by the "IndexChanged" action of the listBox
• view data using:   lstStud.SelectedItem
• view index using:  lstStud.SelectedIndex
• set focus on a line in the listBox with: lstStud.SelectedIndex = searchCount
• clear the highlighted rows with: stStud.ClearSelected()
• Used List box info from: https://docs.microsoft.com/en-us/dotnet/api/system.windows.forms.listbox.selecteditem?view=netcore-3.1
• Changed increment code from:

Changed variable: "foundName" to "foundStud"

Made top form label bold & 12 point