CPSC 481 Tutorial 4. Intro to Visual Studio and C#

Transcription

1 CPSC 481 Tutorial 4 Intro to Visual Studio and C# Brennan Jones bdgjones@ucalgary.ca (based on previous tutorials by Alice Thudt, Fateme Rajabiyazdi, and David Ledo)

2 Announcements I ed you an example showing how the evolved prototype and walkthrough should be presented in your portfolio. Please look through this and refer to it while you re putting together your portfolios. Your assignment deadline is now Oct. 10am.

3 Visual Studio Visual Studio is installed on the lab machines You may download Visual Studio onto your machine for free here Use your IT/webmail account and password to access MSDN Install it after downloading

4 Setting Up SVN Accounts For those who want an SVN account, go to the CPSC help desk (just outside our tutorial room) and ask for one. OR CPSC Help Desk: Request for an SVN account Include members IT account usernames or all usernames you wish to have access to it State it is for your CPSC 481 group project

5 SVN and Visual Studio We won t go over this in tutorial, but here are some resources that can help you: 1. AnkhSVN: 2. VisualSVN: 3. TortoiseSVN:

6 Starting a Project

7 Starting a Project click

8 Starting a Project click

9 Starting a Project click

10 Starting a Project change

11 Workspace

12 Workspace coding area

13 Workspace solution explorer

14 Workspace run your program

15 Hello World!

16 Hello World! click to create a breakpoint

17 Hello World!

18 Hello World! call stack and variables

19 Hello World! debug functions: run, pause, stop, restart

20 By now, you should know Where to download and how to install Visual Studio How to get SVN accounts How to create a new project in Visual Studio Basic features of the workspace How to make a console application How to use the debugger

21 Intro to C# Coding Sources/Materials:

22 C# Naming Conventions Every language has its own naming conventions: E.g., Java uses camelcasing, while C# uses camelcasing for variables and PascalCasing for methods. int myinteger; public void ReturnResults(){ } A lot of people like to call instance variables (or fields) starting with an underscore: int _myinteger Interfaces always start with an I (e.g., ICloneable)

23 Basic C# Syntax Comments work similar to Java: // This is a single-line comment /* This is a multi-line comment */ /// This is how you describe methods /** (This is how you describe methods in Java) */

24 Basic C# Syntax Access modifiers public accessible anywhere private only accessible within the class or struct protected only accessible within the same hierarchy internal only accessible by the same assembly

25 Properties A property is a member that provides a flexible mechanism to read, write, or compute the value of a private field. Also called accessor methods. Properties are public methods. Properties enable a class to expose a public way of getting and setting values, while hiding implementation or verification code.

26 Properties class TimePeriod { private double seconds; public double hours { } get { return seconds / 3600; } set { seconds = value * 3600; } } A get property accessor is used to return the property value. A set accessor is used to assign a new value. The value keyword is used to define the value being assigned by the set accessor. Properties that do not implement a set accessor are read only.

27 class Program { } static void Main() { } TimePeriod t = new TimePeriod(); // Assigning the Hours property causes the 'set' accessor to be called. t.hours = 24; // Evaluating the Hours property causes the 'get' accessor to be called. System.Console.WriteLine("Time in hours: " + t.hours); // Output: Time in hours: 24

28 Foreach Loop using System.Collections; ArrayList list = new ArrayList(); list.add(1); list.add(2); foreach (int i in list) { int j = i; } If you use generic containers (e.g., ArrayList), casting is implicit, unlike Java where you have to explicitly cast.

29 Inheritance A class can inherit a base class and also implement one or more interfaces. public class ChildClass : InterfaceName public class ChildClass : ParentClass public class ChildClass : ParentClass, IInterface1, IInterface2

30 Prototype Iteration Based on your walkthrough and the problems you have identified, create updated designs for your prototype that incorporate your solutions. This exercise does not have to be integrated into your portfolio It will help you for your later implementation Try to address all identified problems

31 Next Week Intro to Assignment 2 (phase 2 of your projects) Intro to WPF (interface building)