: cho form như sau: yêu cầu: a. thiết kế form như hình...

Bi tp 1: Cho form nh sau:

Hng dn:

a. Thit k form:- Khi ng chng trnh visual basic 6.0 ln v chn Standard EXE trong ca s New Project.- Kch chn Form, chnh font ch cho form (khi chnh font ch cho form th font s t ng p dng

cho cc i tng khc trn form) trong Properties.- Nhp p ln lt vo biu tng Label, textbox, command to i tng trn form. Vi bi tp

ny ta c 03 label, 01 textbox, 01 command.- Chn tng i tng v t tn (Name), v ni dung trong Properties ca tng i tng.

b. Vit code:- Nhp p chut vo nt OK, mn hnh code xut hin, tin hnh nhp code mu vo:

Private sub cmdOK_click()

Label3.caption=text1.text

Label3.alignment=2

End sub

Yu cu thm:

Hy vit s kin khi chng trnh c chy (form_load()) th Label2, Label3 b n (visible=False). B sung vo s kin ca nt OK lnh cho php Label2, label3 hin th li (visible=true)

Yu cu:

a. Thit k form nh hnh: dng cc i tng Label,Textbox, Command

b. Vit code lp trnh s kin x l nt OK theoyu cu sau: khi nhp vo nt OK th ni dung caTextbox s xut hin v nm gia Label t mubn di.

Name:Label3

Name:Text1

Name:cmdOK

Bi tp 2: Cho form nh sau:

Hng dn:

c. Thit k form:- Khi ng chng trnh visual basic 6.0 ln v chn Standard EXE trong ca s New Project.- Kch chn Form, chnh font ch cho form (khi chnh font ch cho form th font s t ng p dng


ny ta c 02 label, 01 textbox, 01 command.- Chn tng i tng v t tn (Name), v ni dung trong Properties ca tng i tng.

d. Vit code:- Nhp p chut vo nt OK, mn hnh code xut hin, tin hnh nhp code mu vo:

Private sub cmdOK_click()

label3.Caption = "Chao ban " & text1.Text & vbCrLf & "en vi lp hoc trc tuyenmon Visual Basic 6.0"

label3.Alignment = 2

End sub

Yu cu:

c. Thit k form nh hnh: dng cc i tngLabel, Textbox, Command

d. Vit code lp trnh s kin x l nt OKtheo yu cu sau: khi nhp vo nt OK th nidung ca Textbox s xut hin v nm giaLabel t mu bn di nh mu.

Name:Label3

Name:Text1

Name:cmdOK

Bi tp 3: Cho 02 form nh sau:

Hng dn:e. Thit k form:

- Khi ng chng trnh visual basic 6.0 ln v chn Standard EXE trong ca s New Project.- Kch chn Form, chnh font ch cho form (khi chnh font ch cho form th font s t ng p dng


ny ta c 01 label, 01 textbox, 01 command.- Kch phi chut vo Project chn Add ->form, chn Open to form th 2- Kch chn Form, chnh font ch cho form (khi chnh font ch cho form th font s t ng p dng

cho cc i tng khc trn form) trong Properties.- Nhp p vo biu tng Label to i tng trn form, t mu nh mu bng Backcolor.- Chn tng i tng trn 02 form v t tn (Name), v ni dung trong Properties ca tng i

tng nh mu.f. Vit code:

- Ti Form1, Nhp p chut vo nt OK, mn hnh code xut hin, tin hnh nhp code mu vo:Private sub cmdOK_click()Form2.Label3.Caption = "Chao ban " & text1.Text & vbCrLf & "en vi lp hoc trc

tuyen mon Visual Basic 6.0"Form2.Label3.Alignment = 2Form2.showEnd sub

- Ti Form2, nhp p vo nt Kt thc, g dng mu vo.Private Sub cmdketthuc_Click()Unload Form2End Sub

Yu cu:

e. Thit k 02 form nh hnh: dng cc i tng Label, Textbox, Commandf. Vit code lp trnh s kin x l nt OK v nt Kt thc theo yu cu sau:

- Khi nhp vo nt OK th ni dung ca Textbox s xut hin v nm giaLabel3 ca form2 t mu bn phi nh mu.- Khi nhp vo nt Kt thc th form2 tt v gii phng vng nh form2.

Name:Label3

Name:Text1

Name:cmdOK


Hng dn:1. Thit k form:- Khi ng chng trnh visual basic 6.0 ln v chn Standard EXE trong ca s New Project.- Kch chn Form, chnh font ch cho form (khi chnh font VNI-Times cho form th font s t ng p

dng cho cc i tng khc trn form) trong Properties.- Nhp p ln lt vo biu tng Label, textbox, command, frame, option button, checkbox to

i tng trn form. Vi bi tp ny ta c 02 label, 01 textbox, 01 command, 03 frame, 03 optionbutton, 03 checkbox.

- Chn tng i tng trn form v t tn (Name), v ni dung trong Properties ca tng i tngnh mu.

2. Vit code:

Yu cu:

1. Thit k form nh hnh: dng cc i tng Label, Textbox, Command, Frame,optionbutton, checkbox

2. Vit code lp trnh s kin x l cc nt trn form theo yu cu sau:- Khi nhp vo vng font tng ng th ni dung ca label 2 trong vng Preview s thay itheo font .- Khi nhp vo vng Style tng ng th ni dung ca label 2 trong vng Preview s thay itheo Style .- Nhp ni dung size vo size sau bm Enter th ni dung label2 bin i theo size .- Khi nhp vo nt Cancel th chng trnh kt thc.

Name:Text1

Name:option1,option2,option3

Name:Chek1,Check2,Check3

Name:Label2

Name:

command1

Frame

- Ti Form1, Nhp p chut vo nt Cancel, tng option, tng Checkbox v Textbox mn hnh codexut hin, tin hnh nhp code mu vo:

Private Sub Check1_Click()If Check1.Value = 1 Then

Label2.FontBold = TrueElse

Label2.FontBold = FalseEnd IfEnd Sub=======Private Sub Check2_Click()If Check2.Value = 1 Then

Label2.FontItalic = TrueElse

Label2.FontItalic = FalseEnd IfEnd Sub======Private Sub Check3_Click()If Check3.Value = 1 Then

Label2.FontUnderline = TrueElse

Label2.FontUnderline = FalseEnd IfEnd Sub=====Private Sub Command1_Click()Unload Form1End Sub

===========Private Sub Option1_Click()Label2.FontName = Option1.CaptionEnd Sub====Private Sub Option2_Click()Label2.FontName = Option2.CaptionEnd Sub====Private Sub Option3_Click()Label2.FontName = Option3.CaptionEnd Sub======Private Sub Text1_KeyPress(KeyAscii As Integer)If KeyAscii = 13 Then

Label2.FontSize = Text1.TextEnd IfEnd Sub


Hng dn: T lm tng t bi 4

Yu cu:

g. Thit k form nh hnh: dng cc i tng Label, Textbox, Command,Frame,option button, checkbox

h. Vit code lp trnh s kin x l cc nt trn form theo yu cu sau:- Nhp font vo textbox font v nhn Enter th ni dung ca label 2 trong vngPreview s thay i theo font .- Khi nhp vo vng Style tng ng th ni dung ca label 2 trong vng Previews thay i theo Style .- Nhp ni dung size vo size sau bm Enter th ni dung label2 bin itheo size .- Khi nhp vo nt Cancel th chng trnh kt thc.

Name:Text1

Name:Text2 Name:

Chek1,Check2,Check3

Name:Label2

Name:

command1

Frame


Hng dn: T lm. Sau i 03 checkbox trn thnh 03 option ri vit code iu khin 03 option .

Yu cu:

1. Thit k form nh hnh: dng cc i tng Frame , checkbox2. Vit code lp trnh s kin x l cc nt trn form theo yu cu sau:- Khi nhp vo vng Select color tng ng th mu nn ca form s thay itheo mu .

Name:Chek1,Check2,Check3Frame

Bi Thc Hnh 1 - Lp trnh Visual Basic (VBPR131085)

1

BI THC HNH 1

Lm Quen Vi Lp Trnh Visual Basic

Lu :

Sinh vin T G CODE, KHNG COPY t bi c sn, nm c vic lp trnh.

c mc 4. Kin thc b tr trc khi lm bi.

1 Chun u ra

Sau bi ny, ngi hc c th:

Vit v chy cc chng trnh n gin vi Visual Basic 6.0 s dng cc control: Form, Label, TextBox, CommandButton.

2 Chun b

c li v Form, Label, Textbox, CommandButton.

Ti liu tham kho gi : Chng 2 I TNG V CCH S DNG I TNG, Gio

trnh Visual Basic 6.0, Nguyn ng Quang, i hc S Phm K Thut TP. H Ch Minh.

3 Phng tin

My tnh c ci t Visual Studio 6.0.

4 Kin thc b tr

OptionButton l mt control, cho php chn mt trong cc ty chn. V d:

to cc OptionButton, trc tin ta cn to 1 Frame (chn nt Frame trn Toolbox ),

sau to cc OptionButton (nt OptionButton trn Toolbox ) vo bn trong Frame ny.

Cc hm cn bit:

Val (string): tr v gi tr s ca chui string (gi tr s: c th tnh ton c).

Str (number): tr v chui ca s number (chui: dng in ra, khng tnh ton c).

MsgBox (string): hin ra ca s thng bo, vi ni dung thng ip string. Chui string phi c t trong du ngoc kp. V d: mun hin thng ip Xin chao!, ta dng

lnh MsgBox(Xin chao!).

Cc OptionButton

Frame


2

Cc php ton chia:

/: php chia. V d: 16.198 / 7 = 2.314

\: chia ly nguyn (c s chia v s b chia phi l s nguyn). V d: 7 \ 2 = 3

mod: chia ly d (c s chia v s b chia phi l s nguyn). V d: 7 mod 2 = 1

Cc lu :

Khi t tn cc control nn tun theo quy tc t tn bt u vi tin t i din code

sng sa, d c. V d: t tn txtA cho TextBox A, cmdKetQua cho CommandButton

Ket Qua.

Khi ang vit code, hin th Help, nhn F1 (phi ci MSDN mi c chc nng ny).

Khi ang vit code, nhn Ctrl-Thanh cch c h tr hon tt code. V d: khi cn nhp Integer, ta nhp Inte v nhn Ctrl-Thanh cch c gi : Integer.

i vi label hin th d liu ra, chn BorderStyle: Fixed Single ( to vin cho label).

5 Thi lng: 4 tit

6 Ni dung thc hnh

Bi thc hnh c hng dn chi tit:

6.1 Cng hai s .......................................................................................................................... 2

6.2 Canh l chui....................................................................................................................... 4

6.3 Cng, tr, nhn, chia ........................................................................................................... 5

6.4 n, hin button .................................................................................................................... 7

6.5 Tch s thnh hng trm, chc v n v ............................................................................ 9

6.6 Tm s ln nht trong 3 s ................................................................................................ 11

Bi thc hnh t thc hin:

7.1 B sung bi 6.1 .................................................................................................................. 12

7.2 B sung bi 6.2 .................................................................................................................. 12

7.3 B sung bi 6.3 .................................................................................................................. 12

7.4 B sung bi 6.4 .................................................................................................................. 13

6.1 CNG HAI S

6.1.1 M t

D liu vo: 2 s.

D liu ra: tng 2 s.

iu khin: nt Cong, khi nhn nt ny s tnh tng 2 s.

6.1.2 Thc hin

0. M Visual Basic, chn New Project/Standard EXE, v save vo th mc Bai01_Cong2So (c to trc).


3

1. To form nh hnh:

Vi:

Trng nhp 2 s l TextBox, t tn: txtSo1, txtSo2

Trng hin th tng l Label, t tn: lblKQ. Nh chn BorderStyle: Fixed Single

Nt Cong l CommandButton, t tn cmdCong

canh tri cc control: qut chn cc control Format/Align/Lefts.

xa ch bn trong cc TextBox: chn text box xa ni dung trong thuc tnh Text ca n.

xa ch bn trong cc Label: chn label xa ni dung trong thuc tnh Caption ca n.

2. Nhp p vo nt cmdCong v nhp code:

Private Sub cmdCong_Click()

lblKQ.Caption = Val(txtSo1.Text) + Val(txtSo2.Text)

End Sub

3. Lu v nhn nt Start hay F5 chy v xem kt qu:


4

6.2 CANH L CHUI

6.2.1 M t

D liu vo: khng c.

D liu ra: chui c canh l theo yu cu.

iu khin:

Cc la chn Canh Trai, Canh Phai v Canh Giua: ch nh canh l: tri, phi hay gia.

Nt Thoat: thot chng trnh.

6.2.2 Thc hin

0. M Visual Basic, chn New Project/Standard EXE, v save vo th mc Bai02_CanhLeChuoi (c to trc).

1. To form nh hnh:

Trong Caption ca lblChuoi nhp: Day la mot chuoi. Nh chn BorderStyle: Fixed Single.

OptionButton: trc khi to cc OptionButton, ta phi to mt Frame ( cha cc OptionButton).

Cc OptionButton trong mt nhm phi c t trong mt Frame.

optTrai: t thuc tnh Value: True.

2. Nhp p vo OptionButton optTrai v nhp code:

Private Sub optTrai_Click()

lblChuoi.Alignment = vbLeftJustify

End Sub

3. Nhp p vo OptionButton optPhai v nhp code:

Private Sub optPhai_Click()

lblChuoi.Alignment = vbRightJustify

End Sub

Label:

lblChuoi

OptionButton:

t trn xung:

optTrai

optPhai

optGiua

CommandButton:

cmdClose


5

4. Nhp p vo OptionButton optGiua v nhp code:

Private Sub optGiua_Click()

lblChuoi.Alignment = vbCenter

End Sub

5. Nhp p vo nt cmdClose v nhp code:

Private Sub cmdClose_Click()

End

End Sub


6.3 CNG, TR, NHN, CHIA

6.3.1 M t

D liu vo: 2 s.

D liu ra: kt qu cng, tr, nhn hoc chia ca 2 s theo yu cu.

iu khin:

Nt +, -, *, /: thc hin cng, tr, nhn hoc chia 2 s.

Nt Xoa: xa cc nhp 2 s.

Nt Thoat: thot chng trnh.

6.3.2 Thc hin

0. M Visual Basic, chn New Project/Standard EXE, v save vo th mc Bai03_CongTruNhanChia (c to trc).


6

1. To form nh hnh:

to cc nt c du +, -, *, /, trong phn Caption ca nt ta nhp +, -, *, / (thay v ghi

Cng, Tr, Nhn, Chia).

2. Nhp p vo nt + v nhp code:

Private Sub cmdCong_Click()

lblKQ.Caption = Val(txtSo1.Text) + Val(txtSo2.Text)

End Sub

3. Nhp p vo nt - v nhp code:

Private Sub cmdTru_Click()

lblKQ.Caption = Val(txtSo1.Text) - Val(txtSo2.Text)

End Sub

4. Nhp p vo nt * v nhp code:

Private Sub cmdNhan_Click()

lblKQ.Caption = Val(txtSo1.Text) * Val(txtSo2.Text)

End Sub

5. Nhp p vo nt / v nhp code:

Private Sub cmdChia_Click()

lblKQ.Caption = Val(txtSo1.Text) / Val(txtSo2.Text)

End Sub

6. Nhp p vo nt cmdXoa v nhp code:

Private Sub cmdXoa_Click()

txtSo1.Text = ""

txtSo2.Text = ""

lblKQ.Caption = ""

txtSo1.SetFocus a con nhy vo txtSo1

End Sub

TextBox:

t trn xung:

txtSo1

txtSo2

CommandButton:

t tri sang:

cmdCong, cmdTru,

cmdNhan, cmdChia

Label:

lblKQ

CommandButton:

t tri sang:

cmdXoa, cmdThoat


7

7. Nhp p vo nt cmdThoat v nhp code:

Private Sub cmdThoat_Click()

End

End Sub


6.4 N, HIN BUTTON

6.4.1 M t

D liu vo: khng c.

D liu ra: khng c.

iu khin:

OptionButton An, Hien: ty chn n hoc hin nt Thoat.

Nt Thoat: hin ra thng ip tm bit v thot chng trnh.

6.4.2 Thc hin

0. M Visual Basic, chn New Project/Standard EXE, v save vo th mc Bai04_AnHienButton (c to trc).


8

1. To form nh hnh:

optAn: t thuc tnh Value: True.

cmdThoat: t thuc tnh Visible: False.

2. Nhp p vo OptionButton optAn v nhp code:

Private Sub optAn_Click()

cmdThoat.Visible = False

End Sub

3. Nhp p vo OptionButton optHien v nhp code:

Private Sub optHien_Click()

cmdThoat.Visible = True

End Sub

4. Nhp p vo nt cmdThoat v nhp code:

Private Sub cmdThoat_Click()

MsgBox ("Cam on ban da su dung chuong trinh! Tam biet!")

End

End Sub


OptionButton:

optAn,

optHien

CommandButton:

cmdThoat


9

6.5 TCH S THNH HNG TRM, CHC V N V

6.5.1 M t

D liu vo: mt s c 3 ch s.

D liu ra: s c tch thnh hng trm, hng chc v hng n v.

iu khin: Nt Tinh: thc hin tch s v in kt qu.

6.5.2 Thc hin

0. M Visual Basic, chn New Project/Standard EXE, v save vo th mc Bai05_TachSo (c to trc).


10

1. To form nh hnh:

lblKQ: t thuc tnh Alignment: Center.

2. Nhp p vo OptionButton cmdTinh v nhp code:

Private Sub cmdTinh_Click()

Dim HangTram As Integer

Dim HangChuc As Integer

Dim HangDonVi As Integer

HangTram = Val(txtSo.Text) \ 100

HangChuc = (Val(txtSo.Text) Mod 100) \ 10

HangDonVi = Val(txtSo.Text) Mod 10

lblKQ.Caption = Str(HangTram) & " tram," & Str(HangChuc) & "

chuc," & Str(HangDonVi) & " don vi."

End Sub


TextBox:

txtSo

CommandButton:

cmdTinh

Label:

lblKQ


11

6.6 TM S LN NHT TRONG 3 S

6.6.1 M t

D liu vo: 3 s.

D liu ra: s ln nht trong 3 s

iu khin:

Nt Tm: tm s ln nht v in ra.

6.6.2 Thc hin

0. M Visual Basic, chn New Project/Standard EXE, v save vo th mc Bai06_TimMaxTrong3So (c to trc).

1. To form nh hnh:

2. Nhp p vo OptionButton cmdTim v nhp code:

Private Sub cmdTim_Click()

Dim SoLonNhat As Integer

If Val(txtSo1) > Val(txtSo2) Then

SoLonNhat = Val(txtSo1)

Else


End If

If Val(txtSo3) > SoLonNhat Then


End If

lblKQ.Caption = Str(SoLonNhat)

End Sub

TextBox:

t trn xung

txtSo1

txtSo2

txtSo3

CommandButton:

cmdTim

Label:

lblKQ


12


7 Bi tp ngh: Sinh vin thc hin cc bi tp sau y:

7.1 B sung bi 6.1

M li bi 6.1 v thc hin: click chn form1 v thay i cc thuc tnh sau v quan st cc thay

i trn form:

Appearance Flat

BackColor i mu nn form

BorderStyle Thay i cc dng vin form

7.2 B sung bi 6.2

M li bi 6.2 v thc hin: nh ngha phm tt (hotkey) cho cc option button v nt Thoat

nh sau:

Tc l khi nhn Alt-T s chn Canh tri, Alt-P s chn Canh phi, Alt-G s chn Canh gia,

Alt-H s Thot chng trnh.

Hng dn: Trong Caption ca control, thm & trc k t mun lm phm tt. V d: trong

caption ca OptionButton optTrai nhp: Canh &Trai.

Lu : i khi t hp phm Alt-k t khng hot ng, khi ta nhn Alt-Shift-k t.

7.3 B sung bi 6.3

M li bi 6.3 v thc hin: Thay cc nt bm php ton bng cc nt chn (OptionButton).


13

7.4 B sung bi 6.4

M li bi 6.4 v thc hin: Thm cc OptionButton cho php chn mu sc nn cho nt Thoat:

V thm tip text (thng ip hin ra khi r chut n mt control): Thoat chuong trinh cho nt

Thoat.

Lu : i mu nn CommandButton, khi thit k Form ta phi chn thuc tnh Style ca

CommandButton l: Graphical.

Hng dn: mu nn ca CommandButton c quy nh bi thuc tnh BackColor, v d:

cmdThoat.BackColor = vbWhite : gn nn mu trng cho nt cmdThoat.

Cc mu khc: xanh: vbGreen, mc nh (xm): vbButtonFace.

thm tip text: nhp thng ip vo trng ToolTipText ca control.

____________HT____________

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