Visual Basic Programming Chapter Six Notes Repetition and the Do Statement

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Visual Basic ProgrammingChapter Six
NotesRepetition and the Do Statement

• ADDING ICONS TO YOUR FORM
• It is possible to add an ______________ to your
  title bar by setting the forms
  _________________________________.
• You can use the NUMEROUS icons that come with
  Studio.Net. Of course, if you dont find any that
  you like you can always create your own or find
  some online.
• Ive moved a copy of the icon files that come
  with Visual Studio.Net into our class network
  space for your convenience.
• PROPERTIES OF THE LISTVIEW CONTROL
• __________________________ Determines how items
  display in the ListView Control. Switch to
  _______________________ if you would like to
  display multiple columns.
• _________________________ used to add and edit
  the Columns in a ListView Control.
• You can change the Text Property to give each
  column its own heading.
• Other settings, like Width, can also be adjusted
  if necessary.
• _________________________ specifies whether the
  user can select multiple items in the list.
• _________________________ determines if a check
  box appears with each item in the list, so the
  user can select multiple items.
• ANCHORING CONTROLS
• In previous applications weve developed the
  windows used were not resizable during run time.
• When a form is resized, controls on the form must
  be moved or resized as well in order to maintain
  a usable and balanced user-interface.

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Visual Basic ProgrammingChapter Six
NotesRepetition and the Do Statement

• CHECKBOX CONTROL
• The ____________________________________ is used
  in applications to allow a user to specify one of
  two conditions, such as on or off, yes or no, or
  true or false.
• In the Todays Sales Check program the checkbox
  control was used to input whether an item was on
  sale or not.
• Some important CheckBox Properties
• ___________________ determines whether the box
  is checked or not. Its either True or False.
• ___________________ puts text next to the
  CheckBox explaining its purpose.
• ___________________ Determines the location of
  the check box inside of the control. (right of
  text, left of text etc..)
• DECLARING AN OBJECT AND USING AN OBJECT VARIABLE
• So you have your main form Todays Sales Check
  and the user clicks on the button to Enter
  Todays Sales. You want to launch the second form
  from within the first form.
• Well, as is the case with all forms, the Todays
  Sales Entry Form is a _____________________,
  which means that an instance of the class must be
  declared before it can be used. This can be done
  with an __________________________________________
  .
• Use the Dim statement and the ____________________
  _____. For example
• __________________________________________________
  ________________________
• DECLARING AN OBJECT AND SHOWING A FORM
• The ____________________ determines whether the
  variable contains a complete instance of the
  object.

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Visual Basic ProgrammingChapter Six
NotesRepetition and the Do Statement

• REPETITION AND THE DO STATMENT
• One of the most powerful aspects of computer
  programming is the capability of performing a set
  of operations repeatedly based on certain
  conditions.
• In programming, the process of repeating a set of
  instructions is known as ________________________,
  or __________________________.
• There are four basic types of loops, two of which
  contain the decision to terminate the loop at the
  top of the control structure and two which
  contain the decision to terminate the loop at the
  top of the control structure.
• THE DO WHILE STATEMENT
• A common form of the Do statement is the
  _______________________.
• This statement ___________________________________
  _____________________________ ____________________
  __________________________________________________
  ______.
• Two examples (one tests at the top of the
  structure, one tests at the bottom of the
  structure)
• ______________________________
  ________________________________
• _________________________________
  ___________________________________
• _________________________________
  ___________________________________
• DO UNTIL STATEMENTS
• Another common form of the Do statement is the
  _________________________.

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Visual Basic ProgrammingChapter Six
NotesRepetition and the Do Statement

• WORKING WITH COLLECTIONS
• A ___________________________________ is a group
  of one or more objects that can be accessed and
  operated on as a single entity.
• You have a little bit of experience with
  collections.
• In Project 5 you used a collection to add items
  to your ComboBox. This is using a collection as a
  property of a control.
• As you learned in Project 5, .NET assigns an
  unique __________________________ to each item in
  a collection. This will come in handy when
  working with a ListView Control.
• Before adding items to the ListView Control you
  must
• Create an object to hold the item
• Then you must put the users input into that
  object.
• Then you can add that object to the ListView
  Control
• Finally, you can redisplay the Input Form
• ADDING ITEMS TO A LISTVIEW CONTROL
• __________________ this property always
  displays as the first column in the ListView
  Control.
• ___________________________ If you have more
  than one column in a ListView control, a SubItems
  collection is created.
• Each Item and SubItem has an _____________________
  _____________________________ ___________________
  ___________.
• For Example
• lstTodaysSales.Items(0).Text _________________
  ____

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Visual Basic ProgrammingChapter Six
NotesRepetition and the Do Statement

• EXITING A LOOP PREMATURELY
• It is possible to exit a loop early if necessary.
  Just use the ____________________.
• Examples are below
• __________________________
• __________________________
• NESTED FOR NEXT LOOPS
• When the statements of one ForNext Loop lie
  within the range of another ForNext Loop, the
  loops are said to be ________________, or
  ____________________________.
• An example can be seen below
• IMPLEMENTING A LOOP WITH A FORNEXT STATEMENT
• We talked about ForNext Loops being great for
  controlled-count loops. Here is a perfect example
  from the btnTotalSales in the Chapter 6 Main
  Project. This button is used to add to the total
  for items on sale and items that werent on sale.
• Line 160 sets the intListCount variable to the
  number of items in the ListView Control. The
  _______________________________________________
  of the list box knows exactly how many items are
  in the control. So use it!
• Line 161 and 163 set up the loop. Obviously well
  have to add code between the For and the Next! ?
• ACCESSING ITEMS IN A LISTVIEW CONTROL

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Visual Basic ProgrammingChapter Six
NotesRepetition and the Do Statement

• CONCATENATION OPERATORS
• We learned how to concatenate strings in Chapter
  Four.
• Concatenation Operators are another form of
  concatenation. It is used to save you time when
  you are typing up expressions.
• For Example _____________________
  ______________ can be written as
• 
  ___________________________________
• ______________________________________________ --
  used to start a new line within a string.
• REMOVING ITEMS FROM A LISTVIEW CONTROL
• It is very easy to clear an entire list box. Just
  use the _______________________________.
• For example, this code was found inside the
  btnClearList click event
• __________________________________________________
  ______
• Other methods such as Remove() or Remove At() can
  be used to remove specific items from the list.
• KEYBOARD EVENTS
• This program wanted the user to be able to delete
  any item from the ListView Control simply by
  clicking on the item and then pressing the Delete
  key.
• In order to do that you would have to set up a
  KeyBoard event for the ListView Control. This is
  very simple to do!

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Visual Basic ProgrammingChapter Six
NotesRepetition and the Do Statement

• Use the note space below for the following Coding
  201 topics
• Do While and Do Until Statements
• For Next Statement
• String Manipulation
• Concatenation Operators
• __________________________________________________
  _______________

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Visual Basic ProgrammingChapter Six
NotesRepetition and the Do Statement
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Visual Basic ProgrammingChapter Six
NotesRepetition and the Do Statement