CIS205

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CIS205

• Part 1 dbg --- Getting Acquainted with Visual
  Studio.NET and C

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3 Programming Platforms
Visual Studio.NET Java Open Source (LAMP)
Platform Windows All platforms Linux
Architecture .NET architecture Java Virtual Machine Apache Server
Databases supported Several DBMS Several DBMS MySQL
Programming languages supported C, C, VB, J, and some third party languages Java PHP
Advantages Visual Designer for GUIs ASP.NET for web pages Applets for client Servlets, JSPs for web pages Free
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The Visual Studio.NET IDE

• Visual Studio.NET is an Integrated Development
  Environment (IDE).
• It contains
• the Designer which makes it easy to create
  Graphical User Interfaces (GUIs)
• a context-sensitive text editor
• various language compilers (we will be using C)
• a runtime environment for testing/debugging our
  code
• Visual Studio.NET can be used with other
  programming languages such as C and Visual
  Basic.

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The .NET Framework
J

C
VB
C
Common Language Specification
ASP.NET Web Services and Web Forms
Windows Forms
Visual Studio.NET
ADO.NET Data and XML
Framework Class Library
Common Language Runtime
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Where Does C Fit?
GUIs Web Programming Fully OOP




MS Visual
MS
BASIC
Visual BASIC
BASIC.NET
Procedural programming
classes
1965
1991
2000
MS Visual
ANSI/ISO
BCPL B C
C C
C.NET
Procedural programming classes
1967 1970 1972
1985
1998 2000
Sun Microsystems
C combines the best features of C/C, Java, and
VB in a new visual, fully object-oriented,
event-driven programming language designed for
use with the .NET platform.
Java
1995 2000
MS Visual
C.NET
1997 2000
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Programming Windows with C

• A new language designed specifically for .NET
• Fully object-oriented
• Type safe language
• Built-in Visual Editor for GUI development
• Fundamental programming syntax resembles that of
  C and Java

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Importance of C

• Microsoft wrote much of .NET system programming
  in C and is currently writing next version of
  Windows (Longhorn) in C.
• In Special Report Security, PC Magazine, pg
  78, 8/3/04 issue
• In the course of putting together
  Longhorn, says Nash, of Microsoft were
  making sure that in the design phase, the
  implementation phase, as we build the product ,
  were looking for security and quality issues.
• The company is also using design tools that
  are far more conducive to building secure code.
  It has discarded notoriously insecure languages
  like C and C in favor of C and the Microsoft
  .NET platform.

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C Features

• A considerable amount of pre-defined code resides
  in the Framework Class Library (FCL).
• C can be used to develop
• Console applications (procedural programming)
• Interactive Windows Forms applications (GUIs)
• Web Services (server programs)
• Interactive Web Forms (via ASP.NET)
• Like other .NET languages, code is compiled first
  into MSIL (MS Intermediary Language) and then
  into machine language.

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Objects

• Object Oriented Terminology

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Classes (templates)

• Classes are patterns for objects.
• You might think of a class as a cookie cutter and
  a set of objects as cookies created with that
  cutter (class).
• An object is an instance of a class, and the
  process of creating an object is called
  instantiation.

Class
Objects
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Classes

• A class is code that defines the attributes and
  operations of an object.
• In this course, we may define some custom
  classes. But mostly, we will use classes that
  already exist in .NET libraries.
• It is not necessary for a programmer who uses a
  pre-existing class to know or understand its code
  structure. This concept is called encapsulation.

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Objects (nouns)

• An object is a person, place or thing.
• Objects are instances of classes (template for
  object).
• All objects have attributes (variables) and
  operations (methods).
• What class would each of the pictured objects
  belong to?

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Attributes (adjectives)

• Attributes (variables) are characteristics of an
  object.
• All vehicle objects have make, model, color,
  number of doors, and fuel type. These attributes
  (variables) are described in the class definition
  (template for objects).
• The pictured vehicle is a blue Smart forTwo with
  2 doors that runs on regular gasoline these
  characteristics represent values assigned to
  attributes of this specific vehicle object.

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Operations (verbs)

• Operations (methods) are actions related to an
  object.
• The code associated with these operations
  (methods) is part of the class definition.
• You might purchase, sell, repaint, or crash a
  vehicle.
• These operations may affect the values of the
  attributes of the vehicle object.