ISYS 812 Business Software Development David Chao

Major Types of Software System software: –System management software Operating systems, network management, etc. –System development software Programming languages, computer-aided software engineering (CASE), etc. Application software –General purpose software Word processing, spreadsheets, database mangement, etc. –Application-specific software Business: Transaction processing, business functions – operational, decision, strategic.

Characteristics of Today’s Business Software Bigger and more complex Cross-functional –Enterprise Resource Planning Inter-Organizational –E-Collaboration Global Client/Server structure –N-tier

Characteristics of Today’s System Development Software Graphical, event-driven programming Object-oriented Component programming Support database/internet application development Intelligent development environment

Software Development Process It includes all the activities required to translate a user’s needs into a software product. –Requirements –Analysis and design –Implementation –Test –Project management The software process defines who is doing what, when, and how. –Analyst, designer, programmer, tester, manager, etc.

Major Objectives of ISYS812 Learn the current software development technologies: –Graphical user interface, event-driven, object-oriented, component, database processing, internet and web services, etc. –.Net framework with VB.Net Understand the software development process and management. –UPEDU

Introduction to UPEDU Website: Username & password: students, students Links: –The Book: slides and readings –UPEDU Overview: Case study Disciplines Roles Artifacts

Introduction to VB and.Net

The History of VB Early 1960s:BASIC-Beginner’s All-Purpose Symbolic Instruction Code –Teaching –Simple syntax, easy-to-use –Interpreted language – slow Microsoft’s long history of commitment to BASIC –In the 1980s: QuickBasic, QBasic (shipped with DOS) –In the early 1990s, VB 1.0 Visual interface design and creation Even-driven programming Easy database access –2002: VB.Net Challenges: Java, Internet application development

Portability Java: Write Once Run Anywhere Java Source Code Java Byte Code (Intermediate Code) Java Byte Code Java Virtual Machine (JVM) Executable Code

Microsoft’s.Net Language must compliance with Common Language Specification, CLS. Compile the language into Microsoft Intermediate Language (MSIL) code. The MSIL code is then executed in the Common Language Runtime (CLR), which conceptually is same as the JVM, where it is translated into machine code by a compiler.

.Net Architecture Common Language Runtime Base Class Library Data and XML ASP.Net Windows Forms Common Language Specification VB.NetC#C++

Common Language Runtime: –Manages execution of compiled.NET program. –Provides.Net basic services, such as memory management, garbage collection, etc. Base Class library: define all the basic data types such as system.object, numeric, date, etc. Data and XML: Classes work with database (ADO.NET) and XML document. ASP.Net and Forms: Classes that generate user interface. CLS: CLS dictates the minimum group of features that a.Net language must have.

.Net Advantages It is independence from a specific language. Developers can create a.Net application in any.Net compatible language. –.Net moves most of the functionality from the language to the.Net Framework. All.Net language can use these classes. It can exist on multiple platforms, further extending the portability of.Net programs. Facilitate internet application development: –ASP.Net: Web Forms and XML Web services. Universal data access: Data can be accessed by any Internet-connected device.

Programming in the.Net Framework Programming in the.Net Framework means making use of the classes, objects, and members exposed by the Framework, building your own classes on top of these and manipulating the resulting objects using a.Net language. Ex. VB form is derived from System.Windows.Forms.Form class.

XML and.NET.NET Framework uses XML for: –Configuration –Cache dataset –Web services –Web form layouts –Etc. XML data combined with schema are becoming increasingly important.

XML Example John Smith Peter Chen David Chao $45.00 This is a great book Adam Smith $25.00 This is a second great book