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Microsoft Visual Basic 2010:

Reloaded

Fourth Edition

Chapter OneAn Introduction to Visual Basic 2010

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2009 Pearson Education, Inc. All rights resered.

2

!erie"

# $hat Is a %o&'uter(# Machine, Asse&)l* and +igh-eel -anguages

# Visual Basic !ther +igh-eel -anguages

# !)/ect echnolog*# he Internet and the $orld $ide $e)

# Introduction to Microsoft .E

# -anguage and *nta3

# Visual tudio 2010 I4E

# olutions and Pro/ects

# %reating a e" Pro/ect

# E3a&'les

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5

$hat Is a %o&'uter(

#A computeris a deice that can 'erfor&calculations and &a6e logical decisions &uch

faster than hu&ans can.

# %o&'uters 'rocess data,using sets of

instructions called computer programs.

7 hese 'rogra&s guide co&'uters through orderl* sets of

actions that are s'ecified )* 'eo'le 6no"n as computer

programmers.

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8

$hat Is a %o&'uter(

# A co&'uter is co&'osed of arious deices6no"n as hardware:

7 6e*)oard

7 screen

7 &ouse

7 hard dries

7 &e&or*

7 4V4 dries

7 'rinter

7 'rocessing units

# he 'rogra&s that run on a co&'uter are referred to

as software.

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%o&'uter %o&'onents

%o&'uters can )e thought of as )eing diidedinto si3 units:

# Input unit: his receiing; section of the

co&'uter o)tains infor&ation fro& input devices.

7 In'ut can co&e fro& deices such as the 6e*)oard and

the &ouse.

# Output unit: his shi''ing; section of theco&'uter ta6es infor&ation that the co&'uter has

'rocessed and 'laces it on arious output devices.

7 !ut'ut can )e dis'la*ed on screens, 'rinted on 'a'er,

'la*ed on audio

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%o&'uter %o&'onents

# Memory unit: his "arehouse; section of theco&'uter stores data "hile an a''lication is

running. Its infor&ation is i&&ediatel* aaila)le for

'rocessing.

7 o )e e3ecuted, co&'uter 'rogra&s &ust )e in &e&or*.7 he &e&or* unit retains infor&ation until it can )e sent to

out'ut deices.

7 !ften, the &e&or* unit is called either memoryorprimary

memory.

7 Random-access memory (RAM)is an e3a&'le of 'ri&ar*

&e&or*.

7 Pri&ar* &e&or* is usuall* volatile, "hich &eans that it is

erased "hen the &achine is 'o"ered off.

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%o&'uter %o&'onents

# Central processing unit (CP): he %P? su'erisesthe o'eration of the other sections.

# Arithmetic and logic unit (A!): he A-? @a 'art of the%P? 'erfor&s calculations and &a6es decisions.

# "econdary storage unit: his unit is the "arehousing;section of the co&'uter.

7 4eices such as hard dries, %4R!M dries, 4V4 dries,and ?B &e&or* stic6s are secondar* storage units.

7 hese nor&all* hold 'rogra&s or data that other units are not

actiel* )eing used.

7 he co&'uter can retriee this infor&ation "hen it is neededlater in ti&e. econdar* storage is nonolatile.

7 Infor&ation in secondar* storage ta6es &uch longer to accessthan infor&ation in 'ri&ar* &e&or*.

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Machine, Asse&)l* and +igh-eel -anguages

# Progra&&ers "rite instructions in 'rogra&&inglanguages. o&e of these are directl*understanda)le )* co&'uters, and others reCuireinter&ediate translation ste's.

# %o&'uter languages that are in use toda* can )ediided into three general t*'es:

7 &achine languages

7 asse&)l* languages

7 highleel languages

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# A co&'uter can directl* understand onl* its o"nmachine language.

# As the natural language; of a 'articular co&'uter,&achine language is defined )* the co&'uterDs

hard"are design. Machine languages are &achinede'endent.

# Machine languages generall* consist of strea&s ofnu&)ers @ulti&atel* reduced to 1s and 0s in the

)inar* nu&)er s*ste&.

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# he follo"ing section of a &achinelanguage'rogra& de&onstrates the inco&'rehensi)ilit* of

&achine language to hu&ans:

+1300042774

+1400593419+1200274027

# Machinelanguage 'rogra&&ing 'roed to )eslo" and error 'rone.

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# $ranslator programscalled assem#lersconert asse&)l*language 'rogra&s to

&achine language.

# Although it is clearer to hu&ans, co&'uters

cannot understand asse&)l*language code

until it is translated into &achine language.

# Asse&)l* languages still reCuire &an*

instructions to acco&'lish een the si&'lesttas6s.

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# o s'eed u' the 'rogra&&ing 'rocess,high-level languages"ere deelo'ed.

# Progra&s called compilersconert highleel

language 'rogra&s into &achine language.

# +ighleel languages loo6 al&ost li6e eer*da*

English and contain co&&on &athe&atical

notations.

grossPay = basPay + o!rT"#Pay

# Visual Basic is one of the "orldDs &ost 'o'ular

highleel 'rogra&&ing languages.

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Visual Basic

# Visual Basic eoled fro& %A"IC@BeginnerDsAll'ur'ose *&)olic Instruction %ode, "hich

"as deelo'ed as a language for "riting si&'le

'rogra&s Cuic6l* and easil*.

# $hen Bill ates founded Microsoft %or'oration

in the 19>0s, he i&'le&ented BAI% on seeral

earl* 'ersonal co&'uters.

1

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Visual Basic

# In the late 190s and the earl* 1990s, Microsoftdeelo'ed the MicrosoftF$indo"sFgraphical

user interface (&I).

# 'isual %asic"as introduced )* Microsoft in 1991

to &a6e 'rogra&&ing $indo"s a''lications

easier.

1=

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Visual Basic

# Visual Basic is a socalled o)/ectoriented,eentdrien isual 'rogra&&ing language.

# Progra&s are created "ith the use of a soft"are

tool called an Integrated evelopment

nvironment (I).

# he latest ersions of Visual Basic are full* o)/ect

oriented and res'ond to userinitiated eventssuch

as &ouse clic6s, 6e*stro6es and ti&ers.

# In Visual tudio, it is conenient to &a6e 'rogra&s

)* dragging and dro''ing 'redefined o)/ects li6e

)uttons and te3t)o3es.

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1

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!ther +igh-eel -anguages

#Although hundreds of highleel languages hae)een deelo'ed, onl* a fe" hae achieed )road

acce'tance.

# IBM %or'oration deelo'ed ,ortranin the

&id190s to create scientific and engineering

a''lications.

# CO%O!"as deelo'ed in the late 190s )* a

grou' of co&'uter &anufacturers. %!B!- isused 'ri&aril* for )usiness a''lications that

reCuire the &ani'ulation of large a&ounts of data.

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# he % language gained "ides'read recognition asa deelo'&ent language for the ?IG o'erating

s*ste&.

# %HH "as deelo'ed )* B/arne troustru' in the

earl* 190s at Bell -a)oratories. %HH 'roidesca'a)ilities for o#ect-oriented programming

(OOP).

7 O#ectsare reusa)le soft"are componentsthat

&odel ite&s in the real "orld.

7 !)/ectoriented 'rogra&s are easier to understand,

correct and &odif*.

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# 4eelo'ers use .avato create "e) 'ages "ithd*na&ic content, to )uild largescale enter'rise

a''lications, to enhance the functionalit* of "e)

serers, and to 'roide a''lications for

consu&er deices.

# In 2000, Microsoft announced C/. he %

'rogra&&ing language "as designed

s'ecificall* for the .E 'latfor&. -i6e VisualBasic, % is o)/ect oriented and has access

to .EDs li)rar*.

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!)/ect echnolog*

# Procedural programming languagesfocused onactions @er)s rather than o)/ects @nouns.

# !)/ectoriented languages &ore naturall* reflects the

"a* in "hich "e 'erceie the "orld.

# his has resulted in significant 'roductiit* gains.

7 Pro'erl* designed classes can )e reused on future

'ro/ects

7 ?sing li)raries of classes reduces the a&ount of effort

reCuired to i&'le&ent ne" s*ste&s

7 he 'roduction of soft"are is &ore understanda)le

)ecause it is )etter organiJed and has fe"er &aintenance

reCuire&ents.

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!)/ect echnolog*

# Instead of "orr*ing a)out the details of ho"o)/ects are i&'le&ented, *ou can focus on the

)ehaiors and interactions of o)/ects.

# Visual Basic is one of the "orldDs &ost "idel*

used o)/ectoriented languages.

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he Internet and the $orld $ide $e)

# In the late 19=0s, ARPA rolled out 'lans tonet"or6 the &ain co&'uter s*ste&s of ARPA

funded uniersities and research institutions.

# his )eca&e 6no"n as the ARPAnet, the

grand'arent of toda*Ds Internet.

# Its &ain )enefit 'roed to )e the ca'a)ilit* for

Cuic6 and eas* co&&unication ia "hat ca&e to

)e 6no"n as electronic mail (e-mail).

2

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E3a&'les of Progra&&ing -anguages

# %: fast, efficient code# Kaa: 'latfor& inde'endence

# BAI%: ease of use

# Visual Basic: user interface design using for&s# Perl: te3t &ani'ulation

2

2=

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Visual Basic.E s*nta3

If 3L hen

MessageBo3.ho"@I a& greater than .

Else

MessageBo3.ho" @I a& not greater than .

End If

=

2>

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% *nta3

if @3L

N

MessageBo3.ho" @I a& greater than .O

else

N

MessageBo3.ho" @I a& not greater than .O

2

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-earning a Progra&&ing -anguage

#*nta3# tructure

# Rules

# Punctuation

# Resered $ords @6e*"ords eg. If, Else

# Visual Basic.E is ! case sensitie.

M*%ase is the sa&e as &*%ase and MQ%AE.

# %o&&ent lines start "ith an a'ostro'he @

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# 'isual "tudio0

1232is MicrosoftDs integrateddevelopment environment (I)for creating,

running and de)ugging a''lications.

# he I4E allo"s *ou to create a''lications )*

dragging and dro''ing e3isting )uilding )loc6sinto 'lace.

# his techniCue is called visual programming.

# It is a Ra'id A''lication 4eelo'&ent @RA4 tool)ecause it is focused on 'roductiit*.

Visual tudio 2010 I4E

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Visual tudio 2010 -anguages

# Visual Basic.E# % @'ronounced %har'

# K @'ronounced Khar'

# %HH @'ronounced % 'lus 'lus#AP.E @"e) 'age creation

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Visual Basic 2010 E3'ress

# Visual Basic E3'ress is a co&'act deelo'&ent

eniron&ent for creating Visual Basic.E

a''lications.

# %an create different t*'es of a''lications $indo"s A''lications @$indo"s Sor&s or $PS A''lication

%onsole A''lications

Reusa)le co&'onents or class li)raries

# %annot )uild "e) sites or "e) serices "ith the

Visual Basic E3'ress Edition.

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olutions, Pro/ects, and Siles

5

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%reating a e" Pro/ect

# elect either File > New Project, "hichcreates a ne" 'ro/ect, or File > OpenProject, "hich o'ens an e3isting 'ro/ect.

# Sro& the Start Page, under the RecentProjectssection, clic6 the lin6 Create:Project or Open: Project.

# %lic6 either the New ProjectB$%%o&or theOpen FileB$%%o&.

5=

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$or6ing $ith a Pro/ect

# he Solution Explorer"indo" dis'la*s a list ofthe files in a 'ro/ect and the 'ro/ects in a solution.

# he Properties"indo" dis'la*s an o)/ectDsattri)utes, such as its siJe, color and 'osition. he

Properties"indo" allo"s *ou to set o)/ect'ro'erties isuall* "ithout "riting code.

# ?sing isual 'rogra&&ing, *ou can drag and

dro'; controls onto the Sor& fro& the Toolbox.

Propertiesicon O#ect %rowsericon

$ool#o4icon"olution 4plorericon

5>

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,igure 1*115Properties"indo" dis'la*ing a 'or#Ds 'ro'erties.

Objectsname

(Form1)Objects class

(System.Windows.Forms.Form)

Down arrow for selecting Formor control objects

Items that have beenchanged from their defaultvalues (by the user or by VisualStudio) are listed in bold

Proerty values(right column)

Proerties(left column)

Descrition ofselected roerty

4esigncategory

Selected roerty

!lhabetical icon

"ategori#ed icon

"omonent object bo$

Pro'erties $indo"

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