Notes

VB.NET

*Unit 1 & 2*

The step by step series of instructions is called a *Program*

The process of writing the sets of instructions for the computer to follow is called *Programming*

*Programmers* also called software developers ,design and write programs

An *Application* is a collection of one or more programs that is designed to complete a specific task.

The process of using Programming language or programming environment to build software applications is called *Program Development*


A *Windows Application* is a program with a graphical user interface that runs in the Windows Environment.

A *Web Application* is a program that a user accesses through a web browser.

*Console Application* runs in a text environment such as the Windows MS DOS prompt or CMD

*Components* are programs that serve as helpers or prebuilt pieces of other programs.

A *Web Service* is a program that recieves a request for information from another program over the web and returns data to the requesting program.

A *Windows Service* performs forms maintenance or data gathering tasks without requiring user intervention.

Programming is also referred to as *Coding*

When a program starts to run, it's instructions are placed into the computer's memory and the program is called a *Stored Program*

*Machine Cycle*
Fetch→Decode→Execute→Store

The process of using a programming language or programming environment to build an application made up of one or more programs is called *Application Development*

There are *6 Application Types*
→Windows application
→Web application
→Console application
→Windows services
→Web Services
→Components

A *Standalone Application* is an application that does not require other applications or data sources to run in the operating system

*HTML* - HyperText Markup Language


A *Service* is a program that runs in an operating system and performs tasks such as maintenance information gathering security and notifications but requires no user interaction

Components provide the benefit of *ReUsability*

*OOD* - Object Oriented Design

*OOP* - Object Oriented Programming

*Aggregation* is the term used to describe the concept of an object being composed of other objects

*A Class* is the programmatic implementation or description of an object

*UML* - Unified Modeling Language

*RAD* - Rapid Application Development

Benefits of *OOD and OOP*
→ReUsability
→Stability
→Easier Design
→Faster Design

The background on which the controls are drawn is called a *Form*

The common environment in which applications created for .net run is known as the *.Net Framework*

The .Net Framework provides a programmer with a Rich set of classes,known as the *.Net Framework Class Library*

*CLR* - Common Language Runtime

*MSIL* - Microsoft Intermediate Language

*IDE* - Integrated Development Environment

The *StatusBar* is located above the Windows taskbar at the bottom of Visual basic .Net

A *Solution* is a grouping of projects and related files.

*Keywords* are words that have special meaning within VisualBasic.Net

A *Code Region* is a group of related lines of code.

A *Pixel* is a single point on a display Monitor.

The *Object Box* Displays the name of currently selected Object or control.

The *Description Pane* at the bottom of the Properties window Displays information about the property currently selected in the properties list.

The default value for the StartPosition property is *WindowsDefault*

A *Label Control* is used to display Text

A *TextBox Control* is used to display text or allows user to enter text on a form

A *NumericUpDown Control* is used to display or allow users to enter numbers on a form

A *Button Control* is used during runtime to initiate actions called *Events*

An *Intrinsic Control* is a control that is included on the Windows Forms sheet by default and can't be removed.

When a user selects a control, the control is said to have *Focus*

Using the Tab Key to set the focus on a control is called *Tabbing*

There are *8 Textbox Control Properties*
→BorderStyle
→Text
→TextAlign
→AutoSize
→MaxLength
→MultiLine
→ReadOnly
→WordWrap

There are *4 Label Control Properties*
→FlatStyle
→Image
→ImageAlign
→Text

There are *10 NumericUpDown Control Properties*
→BorderStyle
→TextAlign
→UpDownAlign
→Value
→InterceptArrowKeys
→DecimalPlaces
→Increment
→Maximum
→ThousandsSeparator
→Minimum

There are *4 Button Control Properties*
→FlatStyle
→Image
→ImageAlign
→TextAlign

*Events* are messages sent to an object such as control when the application Runs.

*Code Statements* are instructions to the computer written at design time for computer to execute at runtime.

A program that behaves as just described is called *Event Driven*

Comment can be given by *Rem* or by using *'(Apostrophe)* at beginning

A *Syntax Error* is an error caused by code statements that violate one of the structure or Syntax rules.

The line that starts with the private Sub is called the *Event Procedure Declaration*

A *GroupBox Control* is used as a container for other controls

A *Container Control* serves as a holding area for other controls

The *RadioButton Control* Presents a set of choices.

There are *3 GroupBox Control Properties*
→FlatStyle
→Text
→Height and Width

There are *7 RadioButton Control Properties*
→CheckAlign
→Checked
→FlatStyle
→Image
→ImageAlign
→Text
→AutoCheck


A *Default Button* on a form is specified by *AcceptButton Property*

There are *4 Basic Data Types*
→Character
A) Char
B) String
→Integral
A) Short
B) Integer
C) Long
D) Byte
→NonIntegral
A) Decimal
B) Single
C) Double
→Miscelleanous
A) Boolean
B) Date
C) Object


To declare a constant use the *Const Keyword*

*Arguments* are values that are passed to the function,method or event.

A *Numeric Expression* is any expression that can be evaluated as a Number.

There are *7 Arithmetic Operators*
+,-,*,^,/,,Mod

The *Pmt Function* is in the financial category of runtime Library Functions.

*Arguments of PMT*
rate,nper,pv,fv,due








*Unit 3 & 4*
A *ComboBox Contol* used to present list of choices.

A *DropDown List Box* used to present several discrete text choices.

If...then...else structure is a *Nested Structure*

Label Control has *6* Properties.
→ Size-Width
→ Size-Height
→ Location: X
→ Location: Y
→ TextAlign
→ Text


*ComboBox DropDown* Property Values
→ Simple
→ DropDown
→ DropDownList

*ComboBox Control Properties*
*Appearance*
→ DropDownStyle
→ Text
*Behavior*
→ DropDown Width
→ IntegralHeight
→ ItemHeight
→ MaxDropDownItems
→ MaxLength
→ Sorted

The *String Collection Editor* Window allows you to enter and set initial values in ComboBox List.

*TabIndex* property is used to maintain *Tabbing Order*

In ComboBox each item has an *Index* assigned.

*SelectedIndex* property shows which value is selected.

*DecisionMaking* is process of determining which of one or more paths to take.

The flowchart representation of a decision is *DiamondShaped* symbol.

*Focus()* method is used to set the focus to controls during runtime.

A condition is sometimes called a *Rational Expression*

There are *6 Relational Operators*
→=,>,<,<=,>=,<>

When variables are limited to a particular block it is known as *Block Level Scoping*

To ensure that no further processing occurs, the *Exit Sub Statement* is used.

The *Parameter InfoWindow* is displayed by *Intellisense™*

Each *If* Statement must have corresponding *End If*

There are *4 Logical Operators*
→ And
→ Or
→ Not
→ XOR



When two or more conditions are combined by logical operators , the expression is called a *Compound Condition*

The *Not Logical Operator* allows you to write a condition in which the true value is *Complemented* or reversed.

The *And Logical Operator* is used to combine two or more conditions in an expression.

The *Or Logical Operator* requires only one of the two or more conditions to be true.

The *XOR Logical Operator* requires one of the two conditions to be true.

Two Additional logical operators *AndAlso Logical Operator, OrElse Logical Operator*

The order of evaluation of a series of logical operators is a part of what are called the *Rules Of Precedence*

*Priority*
Arithmetic,Relational,Not,And/AndAlso,Or/OrElse or XOR


The *Concatenation (&) operator* joins two strings in one.


A *Startup Object* can be any form or class that you want to have control when application begins.

A *ListView Control* is used to arrange and display a list of items into single or Multiple Columns , with or without column headings.

*Terminating Condition* is used to let the program know when the data entry is complete.

*ICON Property* allows you to set the form icon.

The *View Property* is used to set display option for the ListView control.

Properties of *ListView Control*
*Appearance*
→ CheckBoxes
→ FullRowSelect
→ GridLines
→ View
*Behavior*
→ Activation
→ Alignment
→ AllowColumnReOrder
→ AutoArrange
→ Columns
→ HeaderStyle
→ Items
→ MultiSelect
→ Scrollable


A *Collection* is a group of one or more objects that can be accessed and operated as a single entity.

The *Anchor Property* specifies the sides of a form to which control is anchored.



*CheckBox* Control Properties*
*Appearance*
→ Appearance
→ CheckAlign
→ Checked
→ CheckState
→ FlatStyle
→ Image
→ ImageAlign
→ Text
*Behavior*
→ AutoCheck
→ ThreeState

*Form.show()* and *Form.showDialog()* are two different things.

The process of repeating a set of instructions is known as *Looping* or *Repetition*


*Do While*, *Do Until* and *While...End While*

The *SubItems* collection is a property of a *ListViewItem Object*

*For...Next* is a counter Controlled loop.

When the statements of one loop lie within the range of another loop, the loops are said to be *Nested* or *Embedded*

The *Count Property* of a collection is used to represent the total number of items in a collection.

The *For Each...Next* loops through a group of statements for each element in a collection , doesnt require a counter.

*Common String Class Methods*
→Chars()
→EndsWith()
→Insert()
→Length()
→PadLeft()
→PadRight()
→Remove()
→Replace()
→StartsWith()
→SubString()
→ToLower()
→ToUpper()
→Trim()

Concatenation Operators For Assignment Statements
→&=,*=,+=,/=,-=,=,^=


The *ReSize()* event occurs when a form or control first displays or when the size changes because the user resizes the form.

The *Me Keyword* allows you to reference the current instance of a form or any other class within the form or class.

A *ContextMenu* control is used to add the shortcut menu to form.

A *PictureBox* Control is used to display image on form.

A *StatusBar* control allows you to place several panels containing status information in window.

The *FontDialog* Control is used to provide interface for font dialog box.

An *AccessKey* is an assigned letter key that allows the user to display a menu at runtime by pressing the alt key and assigned letter key

A *Shortcut Key* is used to execute command when a user presses the key while menu is displayed during runtime.

*Separators* are especially useful on large menus


*StatusBar control* Properties
*Appearance*
→Panels
→SizingGrip
*Behavior*
→ShowPanels

*PictureBox control* Properties
*Appearance*
→Image
*Behavior*
→SizeMode

*CommonDialog* Controls
→OpenFileDialog
→SaveFileDialog
→FontDialog
→ColorDialog
→PrintDialog
→PrintPreview Dialog
→PageSetuoDialog


The elements in array are distinguished from one another by *Index* or *Subscript*


A *Line Continuation Character* allows you to write long lines of code over several lines in code window!


*Array Methods* (*8*)
→BinarySearch()
→Clear()
→Copy()
→CopyTo()
→GetLength()
→GetUpperBound()
→Reverse()
→Sort()

A *Sub Procedure* is a unit of code that executes when called from code in other procedures and event procedures.

There are two methods of passing arguments. By Value and By Reference

A *Control Collection* allows you to treat one or more controls as members of a collection.

You can also use the *Call keyword* to call the sub procedure or function procedure.