1. CSCI 3328 Object Oriented Programming in C# Chapter 11: Files and Streams -- Exercises
UTPA – Fall 2012
This set of slides is revised from lecture slides of Prof. John Abraham. -- Xiang Lian

2. Objectives In this chapter, you will do some exercises about:
Windows GUI
Classes File and Directory
LINQ queries to search through directories
sequential-access file processing
Classes FileStream, StreamReader, StreamWriter, FileStream, and BinaryFormatter

3. Multiple Choices
The smallest data item a computer can process is called a ________.
A. database B. byte C. file D. bit
A group of related records is stored in a ____.
A. file B. field C. bit D. byte
Data maintained in a file is called _____.
A. persistent data B. bits C. secondary data D. databases
Methods from the ____ class can be used to write data to a file.
A. StreamReader B. WriteFile C. StreamWriter D. None of the above
Namespace ____ provides the classes and methods you need to perform file processing.
A. System.IO B. System.Files C. System.Stream D. System.Windows.Forms
A(n) ____ allows the user to select a file to open.
A. CreateFileDialog B. OpenFileDialog C. MessageBox D. SaveFileDialog

4. Multiple Choices (cont'd)
StreamReader method _____ reads a line from a file.
A. ReadLine B. Read C. ReadAll D. ReadToNewline
A _____contains information that is read in the order it was written.
A. sequential-access file B. StreamWriter C. StreamReader D. None of the above
Methods from class _____ can be used to read data from a file.
A. StreamWriter B. FileReader C. StreamReader D. None of the above
Ultimately, all data items processed by a computer are reduced to combinations of _________.
A B. 'a'-'z' C. 'A'-'Z' D. 0's and 1's
Method Serialize of class BinaryFormatter takes a(n) _______ and a(n) __________ as arguments.
A. object and Stream B. Stream and object C. File and object D. object and File

5. True / False Statement
Creating instances of classes File and Directory is impossible.
Typically, a sequential file stores records in order by the record-key fields.
Class StreamReader inherits from class Stream.
Any class can be serialized to a file.
Classes StreamReader and StreamWriter are used with sequential-access files.
The class BinaryFormatter is under the namespace System.Runtime.Serialization.Formatters.Binary.
Class StreamReader inherits from class TextReader

6. True / False Statement (cont'd)
The ListBox control allows only a single selection (like a RadioButton).
Controls such as form, GroupBox, Panel, and TabControl are all containers.
All mouse events use the same event arguments class.
A ComboBox control typically has a drop-down list.
Deleting a parent node in a TreeView control deletes its child nodes.

7. Writing the C# Code
A student record has information such as student ID, last name, first name, birth year, and so on.
Declare a class for a student record
Write a method to write records into a file, using StreamWriter
Write a method to read records from a file into a record array, using StreamReader
Use an LINQ query to find those students with the birth year > 1981, and write them into another file using BinaryFormatter

8. Happy Thanksgiving Day!