CIS 380 Lab 5

And now for something completely different. This is not very related to the gradebook problem. We'll come back to that next time. This is practice creating and using classes and collections.

First the data. This is a file of names, your names to be exact. The file can be seen here and this is a sample.

ASHER MOHamMAD
BADZIAK jason
BELFOURE TRISTA
CABALLES ARLENE
CiotKOwskI RALPH

You will need to create a class that holds a single name. It will have a firstname and lastname property. It will have methods to get and put the first and last names. It will also have methods to returns a string that contains the whole name, either first name first or last name first. The two parts of the name will be separated by commas. Note that the input data is in mixed case. When stored in a class instance, it will be changed to having the first letter of each part upper case and the rest in lower case. So, this

	ArchIE kent

	firstname = Kent
	lastname = Archie 

Now you need a second class to hold a collection of these name objects. It will use the builtin collection class to hold the set of names. It will have properties like count that tells how many are in the collection. It is read-only. Other methods include

• loadFromFile()
Takes a file name as an argument, reads the names from the file and creates name objects and adds them to the collection. It saves the filename for later use by save. saveToFile() Writes the data in the collection back out to the same file in the original format, but with any case changes intact. The original file is overwritten.
• Item()
Takes an integer as an index and returns the name object at that location in the collection.
• find()
Takes three arguments, first and last and a name variable. It searches the collection for that name and sets the name object to the one it finds. If either is blank ("") then use the other only. If both are blank, this is an error. It returns true or false to indicate whether it found something.
• getNext()
This is an iterator. Every time it is called it returns the next name object from the collection. When it hits the end, it returns Nothing. It takes one argument, a string. If the string is the word "reset", it starts at the beginning. Otherwise the argument should be "".

Here is a picture of the main form of the problem. First the user clicks the load data button. If they try to do other things before hitting the load data button, they should be informed of an error. If they put a name (either first or last) in the text box, they can click one of the two buttons. This will start a search of the data in the collection for names that match the textbox contents, either first or last name. The names that match are presented in the list box at the right side.

They can then pick a name from the list box and click the delete button. This will do two things, it will remove the name from the collection and from the list box. Then they can save the data.

The executable may help clarify the requirements. Download the Zip file that contains the executable and data files . Yours does not have to look just like that. The position of the controls, their names or the labels on them is not the primary thing. ASK if you aren't sure what I mean or if you want to know if you are going in the right direction.

Deliverables:

1. Print, fill out and attach the cover sheet.
2. Source Printout. All the needed output can be generated by selecting File from the VB menu bar. Then select Print. This displays a window, from which you should select to print the form image and the code.
   The source code must have your name in the comments as well as the lab name or number.
3. Data Files
Attach a printout of the original data file and the resulting one.

Notes

ASK if you have any questions.