Chapter 1 - VB.NET by Schneider An Introduction to Computers and Visual Basic.NET Chapter 1 - VB.NET by Schneider

Outline and Objectives Introduction to Computers Using Windows Files and Folders An Introduction to Visual Basic.NET Biographical History of Computing Chapter 1 - VB.NET by Schneider

Chapter 1 - VB.NET by Schneider Background needed Microsoft Windows Mouse Notepad Windows Explorer Files and directories Chapter 1 - VB.NET by Schneider

Introduction to Computers Personal computer Generally, a computer that is operated by one person at a time Chapter 1 - VB.NET by Schneider

Computer uses in Society Banking – customer transactions Airlines – reservations system NASA – control satellites Internet – email, research, shopping Chapter 1 - VB.NET by Schneider

Programs Students Will Create in This Text Create and manage a list of friends' addresses and phone numbers Calculate loan payments and amortization Computations to support other course work Chapter 1 - VB.NET by Schneider

Communicating with the Computer Machine language – low level, 0 and 1, hard for humans to understand VB.NET – high level, understood by humans, consists of instructions such as Click, If, Do Chapter 1 - VB.NET by Schneider

Computers and Complicated Tasks Tasks are broken down into instructions that can be expressed by a computer language A program is a sequence of instructions Programs can be only a few instructions or millions of lines of instructions Chapter 1 - VB.NET by Schneider

Chapter 1 - VB.NET by Schneider Servers A server can be almost any computer A server provides resources to other computers Files Internet Printers Chapter 1 - VB.NET by Schneider

All Programs Have in Common: Take data and manipulate it to produce a result Input – Process – Output Input – from files, the keyboard, or other input device Output – to the monitor, printer, file, or other output device Chapter 1 - VB.NET by Schneider

Chapter 1 - VB.NET by Schneider Hardware and Software Hardware – the physical components of a computer Microprocessor Keyboard Disk drive Monitor Software – The instructions that tell the computer what to do Chapter 1 - VB.NET by Schneider

Chapter 1 - VB.NET by Schneider Programmer and User Programmer – the person who solves the problem and writes the instructions for the computer User – any person who uses the program written by the programmer Chapter 1 - VB.NET by Schneider

Chapter 1 - VB.NET by Schneider Problem Solving Developing the solution to a problem Algorithm – a step by step series of instructions to solve a problem Problems are solved by carefully reading them to determine what data are given and what outputs are requested. Then a step-by-step procedure is devised to process the given data and produce the requested output. This procedure is called an algorithm. Finally, a computer program is written to carry out the algorithm. Algorithms are discussed in Section 2.2. Chapter 1 - VB.NET by Schneider

Types of Problems in this Text Business computations Managing records Managing lists And more Chapter 1 - VB.NET by Schneider

Chapter 1 - VB.NET by Schneider BASIC developed at Dartmouth in the early 1960s Visual Basic created by Microsoft in 1991 VB.NET similar to Visual Basic, but more powerful Chapter 1 - VB.NET by Schneider

Chapter 1 - VB.NET by Schneider Internet A connection of thousands of networks around the world – each network has A computer and one or more routers Router is a device or computer connected to two or more networks All use TCP/IP Chapter 1 - VB.NET by Schneider

World Wide Web vs. Internet World Wide Web is a collection of information stored on servers throughout the Internet known as Web servers. HTTP – HyperText Transfer Protocol enabled researchers to share data – creating a "web" of information Internet is used to access documents on the World Wide Web It determines the overall performance of computer. CU: coordinates and controls all the other parts of the computer system. ALU: Does the actual processing by performing mathematical operations Microprocessor: the CU and ALU mounted on a single silicon chip Chapter 1 - VB.NET by Schneider

Chapter 1 - VB.NET by Schneider 1.2 Using Windows Chapter 1 - VB.NET by Schneider

Chapter 1 - VB.NET by Schneider Mouse Actions: Pointing Hovering Clicking Double-Clicking Dragging Pointing means moving your mouse across your desk until the mouse pointer is over the desired object on the screen. Hovering means to linger the mouse at a particular place and wait for a message or menu to appear. Clicking (sometimes people say single-clicking) means pressing and releasing the left mouse button once. Whenever a sentence begins “Click on . . . ,” you need to 1. move the mouse pointer until it is at the object you are supposed to click on and 2. press and release the left mouse button. An example of a sentence using this jargon might be “Click on the button marked Yes.” You also will see sentences that begin “Click inside the . . . .” This means to move the mouse pointer until it is inside the boundaries of the object, and then click. Double-clicking means clicking the left mouse button twice in quick succession (that is, pressing it, releasing it, pressing it, and releasing it again quickly so that Windows doesn’t think you single-clicked twice). Whenever a sentence begins “Double-click on . . . ”, you need to 1. move the mouse pointer until it is at the object you are supposed to double-click on and 2. press and release the left mouse button twice in quick succession. For example, you might be instructed to “Double-click on the little box at the far left side of your screen.” Note: An important Windows convention is that clicking selects an object so you can give Windows or the document further directions about it, but double-clicking tells Windows to perform a default operation. For example, double-clicking on a folder will open that folder. Dragging usually moves a Windows object. If you see a sentence that begins “Drag the . . . ”, you need to Chapter 1 - VB.NET by Schneider

Windows and Its Little Windows Title Bar Active window Chapter 1 - VB.NET by Schneider

Chapter 1 - VB.NET by Schneider Using the Notepad Reviewing Notepad to learn more about Windows application Notepad is an item in the Accessories menu Notepad can be used to create simple data files Chapter 1 - VB.NET by Schneider

Chapter 1 - VB.NET by Schneider Notepad Chapter 1 - VB.NET by Schneider

Chapter 1 - VB.NET by Schneider Parts of the Window Restore button Vertical scroll bar Horizontal scroll bar Menu bar The default extension for a file created with Notepad is TXT. Esc key used in Notepad to remove a dialog box Clicking on the Maximize button of a window makes the window fill the entire screen Clicking on the Minimize button of a window changes the window into an icon Chapter 1 - VB.NET by Schneider

Chapter 1 - VB.NET by Schneider 1.3 Files & Folders: Disk is a permanent storage. A disk can store thousands of files. A disk drive is identified by a letter. To organize your files you have to store them in different folders (directories). Chapter 1 - VB.NET by Schneider

Key Terms in using Folders Root folder Path Example: C:\VB01\VB.EXE File Specification: You should always know where you are saving your files. Filename Drive letter Think of a disk as a large folder, called root folder, that contains several smaller folders each with its own name. The naming of folders follow th same rule as naming files Each folder is identified by listing its name preceded by a backslash A filespec typically includes the drive, path and the filename. File is identified by a small directory or folder is identified by a folder icon executable file: is identified by a rectangle with a thin bar across top Go over: How to create a folder to rename a folder to delete a folder or file to Copy a folder or file To move a folder or file Chapter 1 - VB.NET by Schneider

Chapter 1 - VB.NET by Schneider Explorer window Chapter 1 - VB.NET by Schneider

Using Windows Explorer Start | Run | type in Explorer Folder pane on left Detail pane on right Chapter 1 - VB.NET by Schneider

To Display File Extensions Alt/T/O Click View Uncheck "Hide file extensions for known file types" Click OK Chapter 1 - VB.NET by Schneider

Chapter 1 - VB.NET by Schneider To Create a New Folder Highlight the folder that is to contain the new folder File | New | Folder Type in a name for the new folder and press Enter Chapter 1 - VB.NET by Schneider

To Rename a Folder or File Right click on the folder or file Click on Rename Type in a new name (or alter the current name) and press Enter Chapter 1 - VB.NET by Schneider

To Delete a Folder or File Right click on the folder Click on Delete Click on Yes Chapter 1 - VB.NET by Schneider

Chapter 1 - VB.NET by Schneider To Copy a Folder or File Right click on the folder file Click on copy Open the folder where the copy is to be placed Right click on the second folder Click on Paste Chapter 1 - VB.NET by Schneider

Chapter 1 - VB.NET by Schneider To Move a Folder or File Right click on the folder or file Click on Cut Open the folder where the copy is to be moved Click on the second folder with the right mouse button Click on Paste Chapter 1 - VB.NET by Schneider

Using the Open and Save As Dialog Boxes Chapter 1 - VB.NET by Schneider

Chapter 1 - VB.NET by Schneider Read-Only Attribute Folders and files copied from a CD or DVD onto a hard disk are read-only To turn off the read-only Right click on the file or folder Click on Properties Click on the General tab In the Attributes section, uncheck read-only Click OK button Chapter 1 - VB.NET by Schneider

Introduction to Visual Basic .NET: Language used to create Windows application. Provides a Graphical User Interface or GUI. The sequence of instructions executed in the program is controlled by events. Chapter 1 - VB.NET by Schneider

Chapter 1 - VB.NET by Schneider Sample Input Screen Chapter 1 - VB.NET by Schneider

How to Develop a VB.NET Application Design the Interface for the user. Determine which events the controls on the window should recognize. Write the event procedures for those events. Chapter 1 - VB.NET by Schneider

When a VB .NET program is running…. VB.NET monitors the controls in the window to detect events (mouse clicks, movements, keystrokes, etc.) When VB.NET detects an event, it examines the program to see if the programmer has written an event procedure for that event. If an event procedure is written for the event, VB.NET executes the procedure and goes to step 1. If no event procedure is written, VB.NET waits for the next event and go back to step 1 Chapter 1 - VB.NET by Schneider

When a Traditional program is running… Execution starts from the entry point and moves according to the flow of the program Chapter 1 - VB.NET by Schneider

Different Versions of Visual Basic VB.NET – 2002 – NOT BACKWARD COMPATIBLE WITH EARLIER VERSIONS OF VISUAL BASIC Chapter 1 - VB.NET by Schneider

1.5 Biographical History of Computing Chapter 1 - VB.NET by Schneider

Chapter 1 - VB.NET by Schneider George Boole – devised Boolean algebra Charles Babbage – created "analytical engine" Augusta Ada Byron – first computer programmer Herman Hollerith – founder of company that would become IBM Chapter 1 - VB.NET by Schneider

Chapter 1 - VB.NET by Schneider Alan Turing – deciphered German code in WWII; father of artificial intelligence John V. Atanasoff – inventor of first electronic digital special purpose computer Chapter 1 - VB.NET by Schneider

Chapter 1 - VB.NET by Schneider Howard Aiken – built large scale digital computer, Mark I Grace M. Hopper – originated term "debugging"; pioneered development and use of COBOL John Mauchley and J. Presper Eckert – built first large scale general purpose computer, ENIAC Chapter 1 - VB.NET by Schneider

Chapter 1 - VB.NET by Schneider 1940s continued John von Neumann – developed stored program concept Maurice V. Wilkes – built EDSAC, first computer to use stored program concept John Bardeen, Walter Brattain, and William Shockley – developed transistor that replaced vacuum tubes Chapter 1 - VB.NET by Schneider

Chapter 1 - VB.NET by Schneider John Backus – created Fortran; early user of interpreters and compilers Reynold B. Johnson – invented the disk drive Donald L. Shell – developed efficient sorting algorithm Chapter 1 - VB.NET by Schneider

Chapter 1 - VB.NET by Schneider John G. Kemeny and Thomas E. Kurtz – invented BASIC Corrado Bohm and Guiseppe Jacopini – proved that any program can be written with only 3 structures: sequence, decision, and loops Edsger W. Dijkstra – stimulated move to structured programming by declaring "GOTO" harmful Chapter 1 - VB.NET by Schneider

Chapter 1 - VB.NET by Schneider 1960s continued Harlan B. Mills – advocated use of structured programming Donald E. Knuth – wrote definitive work on algorithms Ted Hoff, Stan Mazer, Robert Noyce, and Frederico Faggin – developed first microporcessor Chapter 1 - VB.NET by Schneider

Chapter 1 - VB.NET by Schneider 1960s continued Douglas Engelbart – invented computer mouse Chapter 1 - VB.NET by Schneider

Chapter 1 - VB.NET by Schneider Ted Codd - software architect; laid the groundwork for relational databases Paul Allen and Bill Gates - cofounders of Microsoft Corporation Stephen Wozniak and Stephen Jobs - cofounders of Apple Computer Inc. Dan Bricklin and Dan Fylstra - wrote VisiCalc, the first electronic spreadsheet program Chapter 1 - VB.NET by Schneider

Chapter 1 - VB.NET by Schneider 1970s continued Dennis Ritchie - creator of the C programming language. Ken Thompson - created the Unix operating system Alan Kay – developer of Smalltalk, a pure object-oriented language Don Chamberlain - created a database programming language, later known as SQL, Chapter 1 - VB.NET by Schneider

Chapter 1 - VB.NET by Schneider Phillip “Don” Estridge - at IBM directly responsible for the success of the personal computer. Mitchell D. Kapor - cofounder of Lotus Corporation Tom Button - group product manager for applications programmability at Microsoft; headed the team that developed QuickBasic, QBasic, and Visual Basic. Chapter 1 - VB.NET by Schneider

Chapter 1 - VB.NET by Schneider 1980s continued Alan Cooper - considered the father of Visual Basic. Tim Berners–Lee - father of the World Wide Web. Charles Simonyi - the “father of Word.” Bjarne Stroustrup - creator of the C++ programming language. Richard M. Stallman - founded Free Software Foundation Chapter 1 - VB.NET by Schneider

Chapter 1 - VB.NET by Schneider Marc Andreessen - inventor of the Web browser. James Gosling – creator of Java. Linus Torvalds - developed the popular Linux operating system. Chapter 1 - VB.NET by Schneider

Chapter 1 - VB.NET by Schneider 1990s continued Brian Behlendorf, Rob McCool, and Roy Fielding - developers of the Apache HTTP server, an open-source Web server that can scale up quickly to handle high volumes of traffic. Chapter 1 - VB.NET by Schneider