Homework Assignment #9

Most students completed this in class #8 on 4/9/2007.

- copy halloween2005 dir from 
   U:\cs206-1\halloween2005
    to your floppy

- change the dir name to: hmwk9

- copy the files dir from
   U:\cs206-1\Files
    to your floppy

- start Visual Studio 2005
   in solution explorer
    expand  App_code
     dbl click: ProductIO.vb

find a line like this:
Dim CategoryStream As New
FileStream("D:\proj\2007\rancho\s2007spr\206\murach\Files\Categories.dat",

and change the pathname to the floppy like this:

FileStream("A:\Files\Categories.dat",

do the same for the other file.

In the soln explorer,
 right click: order.aspx
  set as start page

start without debugging
 and the application should start ok.

review p 88 on how to add another form to your project.
review p 93 on what code changes from one form to another.
   We will use the redirect method,
    even though it is a little less efficient,
     because it is more user friendly
      in that that url reflects the new page.

Next we will replace the current checkout code
 (which just prints a msg it is not implemented)
  to go to a new form
   which says not implemented.
    and has a button to go back.

close the browser that was running the application.

in the soln explorer
 right click the project name (a:\hmwk9)
  add new item
   make sure the template selected is: web form
   change the name to: checkout.aspx
   make sure this is checked: place code in separate file

bring up order.aspx
 right click the banner image
  click copy
   bring up checkout.aspx
    right click
     click paste
      so checkout.aspx has the same Halloween banner

Under the banner
 add a message that the checkout screen has not yet been implemented.
  put this in 16 pt font of type ariel.

Change the checkout button
 to go the checkout screen.
  In the checkout screen,
   add 1 button
    to go to the order screen.
     Run your program,
      make sure you can go back and forth
       between the order screen and the checkout screen.

Challenge:  (not graded)
  add a 2nd button
   to go the the shopping cart screen
    but keep this grey'ed out
     until there is something in the cart
      and it is ok to go there.

Review page 100 on validation controls.
  in your checkout screen.
   add txtBox1
   add a "Required field validator"
    (review page 102 on this validator)
    in the properties for that validator
     set ControlToValidate to be txtBox1
     set Text property to: This cannot be blank

Test your program
   you should not be able to leave the checkout screen
    if the text box is blank.
     
Note: one student seemed to set everything correctly
  but the validator did not display the error
  and did not prevent the button from working.
  adding a new button solved the problem.
     
review page 102 on the compare validator
add a 2nd validator to your screen: the compare validator
   control to validate: txtBox1
   operator: greater than
   value to compare: 5
   text: value must be greater than 5