C SharpWeb & Internet Programming

GroupDiana, Aren, Jeff, & Adam, Farrin

5/5/2008 1CS 311

Anders Hejlsberg formed a team January 1999

Publicly announced July 2000 Third Version in June 2005

5/5/2008 2CS 311

Visual J++ Turbo Pascal Based on Java Delphi Smalltalk Based on C++ Visual Basic

5/5/2008 3CS 311

Simple General-purpose OOP Ground up design Components High Level Source code Portable Compiled

5/5/2008 4CS 311

Preprocessor directives No Actual preprocessor Symbols but no macros

5/5/2008 5CS 311

Int Long Char Float Bool Double Byte Word

5/5/2008 6CS 311

Implicit conversions Enumeration members are placed in their

own namespace. Type Reflection

5/5/2008 7CS 311

C# supports a strict Boolean type, Bool Conditionals No 1=True Easy conversion If(a=b) mistake

5/5/2008 8CS 311

New features Can be cross-language C++ templates can not Type Constraints No non-typed parameters

5/5/2008 9CS 311

global variables Methods and members shadow variables Similar to C++ and Java Int A=1; string B = Boo;

5/5/2008 10CS 311

Similar to C++ If( Bool){} While(Bool){}

5/5/2008 11CS 311

No Global functions All method and member functions must

be declared within classes

C# pointers Managed memory Garbage collected

5/5/2008 12CS 311

Similar to C++ class example_class { { //

implementation } } All methods and members Multiple Inheritance

5/5/2008 13CS 311

5/5/2008 14CS 311

Allows class implementation across more than one source file.

file1.cs: public partial class MyClass { public

MyClass() { // implementation } } file2.cs: public partial class MyClass { public void

SomeMethod() { // implementation } }

Light weight classes Allocated on stack

5/5/2008 15CS 311

A dynamic linking library(s) Shared Libraries

5/5/2008 16CS 311

// File: Add.cs namespace UtilityMethods { public class AddClass { public static long Add(long i, long j) { return (i + j); } } }

namespace UtilityMethods { public class MultiplyClass { public static long Multiply(long x, long y) { return (x * y); } } }

5/5/2008 17CS 311

// File: TestCode.cs using UtilityMethods; class TestCode { static void Main(string[] args) { System.Console.WriteLine("Calling methods from MathLibrary.DLL:");

if (args.Length != 2) { System.Console.WriteLine("Usage: TestCode

<num1> <num2>"); return; } long num1 = long.Parse(args[0]);

} }5/5/2008 18CS 311

New int foo = 42; // Value type... object bar =

foo; // foo is boxed to bar. int foo = 42; // Value type. object bar =

foo; // foo is boxed to bar. int foo2 = (int)bar; // Unboxed back to value type.

5/5/2008 19CS 311

August 2000 Specs submitted + CLI ISO Standard 2003 June 2005 third edition Approved

5/5/2008 20CS 311

using System; // A "Hello World!" program in C#

namespace Hello World { class Hello { static void Main()

{ System.Console.WriteLine("Hello World!");

} } }

5/5/2008 21CS 311

// /* */ XML documentation

5/5/2008 22CS 311

.NET Only available on Windows Greater resources required Nonstandard classes

5/5/2008 23CS 311

www.en.wikipedia.com\c-sharp.html http://msdn.microsoft.com/vcsharp/ http://msdn2.microsoft.com/en-us/library/

67ef8sbd(VS.80).aspx http://msdn2.microsoft.com/en-us/vcshar

p/aa336809.aspx http://standards.iso.org/ittf/PubliclyAvaila

bleStandards/c042926_ISO_IEC_23270_2006(E).zip

5/5/2008 24CS 311

New file1.cs: public partial class MyClass { public

MyClass() { // implementation } } file2.cs: public partial class MyClass { public void

SomeMethod() { // implementation } }

5/5/2008 25CS 311

No Global functions All method and member functions must

be declared within classes

5/5/2008 26CS 311

// Method that takes an iterable input (possibly an array) and returns all even numbers.

public static IEnumerable<int> GetEven(IEnumerable<int> numbers)

{ foreach (int i in numbers) { if (i % 2 == 0) yield return i; } }

5/5/2008 27CS 311