CSC 230: The Week beginning Oct. 29

Homework

Provide a brief definition of the following terms (in the interface programming context):

• Magic numbers
• Compile Error
• Run time error
• Debug

• Monday

  
  Morse.csv
  
  The above file has a strange character that looks like a space but is not. If you recall this also happened when we made the list of color names. Open the file in Notepad, highlight the space-like character and copy it. Then go to Find and Replace and paste the character (Ctrl-v) into Find and leave Replace blank, then choose Replace All.
  
  MorseZip.zip (demos an array of dynamic controls with events)
  
  

• Wednesday

  
  WriteALetterZip.zip (Dialogs and StreamWriter)
  
  

• Thursday

  
  

  Old navy

  OldNavyZip.zip (files and exe)
  
  
  • Use backgroundtitle.gif as the Form's BackgroundImage
  • Have a PictureBox in the upper left with its BackColor set to Transparent and its Image set to logo.gif.
  • Parse the file OldNavyItems.txt and make arrays for at item's name, its description, its price, the end of its file name (e.g. LogoHoodie.jpg), and its set of colors which will be a comma-separated string (e.g. Black,RoosterRed,DarkSeaBlue).
  • Place the item names in a listbox on the left.
  • To the right of the ListBox have a Label (for a description), a PictureBox (for an image of the item), and a Panel (for colors, see below).
  • When the user selects a item from the ListBox
    • Display the corresponding description in the Label.
    • Clear the panel's controls (just like clearing a ListBox of Items).
    • Parse the color set.
    • Use the resulting array to generate an array of dynamic PictureBoxes (15 by 15).
    • Add the Pictureboxes to the Panel, their Y position values can be zero (within the Panel) and their X position values should be spaced out.
    • Load the PictureBox's Image with a file based on the element from the parsed color array and the extension ".gif".
    • Have a global color variable and set it equal to the first color in the array.
    • Concatenate the first color in the array and the end of the selected item's file name (one of your global arrays) and ".jpg" (e.g. DarkSeaBlueLogoHoodie.jpg) and use that to display an image of the selected item with the first color.
    • Assign the PictureBox's Tag propety a value equal to the color element (e.g. DarkSeaBlue). (I think of the Tag Property as a control's "secret compartment" for storing useful information.)
    • Use AddHandler to give the PictureBoxes three events: MouseEnter, MouseLeave and Click. (An exe is provided, mouse over and click on the color PictureBoxes to see the effect.)
    • The MouseEnter subroutine should concatenate the sender PictureBox's Tag (a color) with the Selected Item's "end of file name" and ".jpg" to display the image of the selected item having the color the user's mouse is over.
    • The MouseLeave subroutine should go back to the global color variable and change the image.
    • The MouseClick subroutine should change the global color variable to correspond to the sender's Tag.
  • When the user clicks the Add to cart Button, make sure that an item is selected, and make sure that a size is selected.
  • Then add the quantity, name, color, size and price information to the cart TextBox.
  • Keep a running Total and Display it.
  • When the user clicks the Save Button, use an OpenFileDialog to allow the user to save the cart information and Total.
  • When the User clicks the Clear Button, deselect any selected item.
  • Then clear out the PictureBox, the description Label, the Panel, the cart TextBox, the total TextBox (also set any total variable to zero).
  • Also deselect any size RadioButtons and set the Quantity (NumericUpDown)to 1.
  
  
  

• Friday

  
  UserControls.ppt
  YahtzeeZip.zip