ListView
ListView . Windows ListView . , Windows . , Windows.
() , True LabelEdit ListView. SubItems , ( InputBox).
ListView . .
136 . , . , . .
ListView . . :
StarDraft
300
UntiReal
500
Suake
200
Feroes III
800
5 , 5 . 20.11. , LV :
Dim i As Integer '
Private Sub (ByVal sender As System.Object, ByVal e As System.EventArgs) Handles .Click
Dim As New System.IO.StreamWriter("E:\VB\.txt")
For i = 0 To LV.Items.Count
- 1
.WriteLine(LV.Items(i).SubItems(0).Text) ' 1 i-
.WriteLine(LV.Items(i).SubItems(1).Text) ' 2 i-
.WriteLine(LV.Items(i).SubItems(2).Text) ' 3 i-
Next
.Close()
End Sub
: ListView , 16.2, . . Items Count, , . 0, LV.Items.Count-1. i , . .
ListView . LV. ( . 20.13). . :
Private Sub (ByVal sender As System.Object, ByVal e As System.EventArgs) Handles .Click
' :
Do Until LV.Items.Count = 0 ' ,
LV.Items(0).Remove() ' 0 ,
Loop
' :
Dim As New System.IO.StreamReader("E:\VB\.txt")
i = 0
Do While .Peek() <> -1
' :
LV.Items.Add(.ReadLine)
LV.Items(i).SubItems.Add(.ReadLine) '
LV.Items(i).SubItems.Add(.ReadLine) '
i = i + 1
Loop
.Close()
End Sub
: LV.Items(0).Remove() , . Items.Add, Items, SubItems.Add, SubItems.
ListView. ListView , . ListView . , , , . , True MultiSelect.
:
Private Sub (ByVal sender As System.Object, ByVal e As System.EventArgs) Handles .Click
' :
LV.Items.Add(InputBox(" "))
' :
LV.Items(LV.Items.Count - 1).SubItems.Add(InputBox(" "))
LV.Items(LV.Items.Count - 1).SubItems.Add(InputBox(" (-)"))
End Sub
: LV.Items.Count-1 .
:
Private Sub (ByVal sender As System.Object, ByVal e As System.EventArgs) Handles .Click
For i = LV.Items.Count - 1 To 0 Step -1
If LV.SelectedIndices.Contains(i) Then
LV.Items(i).Remove()
End If
Next
End Sub
: ListView SelectedItems SelectedIndices. . SelectedIndices Contains, , ListView ( i) .
If LV.SelectedIndices.Contains(i) Then
: i, .
, , . , , , , , .
:
Private Sub (ByVal sender As System.Object, ByVal e As System.EventArgs) Handles .Click
Dim As String = InputBox(" ")
Dim As String = InputBox(" ")
Dim As String = InputBox(" (-)")
For i = 0 To LV.Items.Count - 1
If LV.SelectedIndices.Contains(i) Then
LV.Items(i).SubItems(0).Text =
LV.Items(i).SubItems(1).Text =
LV.Items(i).SubItems(2).Text =
End If
Next
End Sub
: .
TreeView
. , 4 .
. , . Form1_Load . , ? . (15.9). , , , , .
:
Dim K As Integer = 0 ' 4-
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
(TreeView1)
Debug.WriteLine(K)
End Sub
Sub (ByVal As Object)
Dim As TreeNode
For Each In .Nodes
If Len(.Text) = 4 Then K = K + 1
()
Next
End Sub
, . .
: , , . . - , .
For Each In .Nodes
.
If Len(.Text) = 4 Then K = K + 1
, , 4 , .
()
. VB , . VB , , .
, , , . , (TreeView1).
: :
Sub (ByVal As TreeNode)
, TreeView TreeNode. ..
. , , , . , .
15.
, 2 .
16.
, 2 , ˻.
17.
, 1 2.
18.
Ի, - . : .
, . . . , :
, , .
, , .
, .
(Solution)
VB , , - . VS (Solution). . . , (. 21.9), ( Solution Explorer ) ( ), . , Solution Explorer: .
, , , : (WindowsApplication1.vbproj) (WindowsApplication1.sln). 1.3.6.
, , , File Open Project ( ), , . File Add Project( ). , , (New Project)
(Existing Project). .
Solution Explorer (. 21.10).
. 21.10
, Start ? , . , , Solution Explorer , Set as StartUp Project. ( ), Remove.
. , , .
, , , . . - . , , , , .
. , .
, , , Visual Studio .NET, .
. DrawRectangles( DrawRectangle!) . :
Dim As Graphics = Me.CreateGraphics
Dim _() As Rectangle = {New Rectangle(10, 50, 30, 40), _
New Rectangle(100, 10, 60, 20), _
New Rectangle(20, 20, 120, 50)}
.DrawRectangles(Pens.Black, _)
(. 17.2).
. 17.2
FillRectangles :
.FillRectangles (Brushes.OrangeRed, _)
Web-
HTML- Web-. , Web- - . , - . . .
Web-. " ". VB ( 138). . 1 . . . "" "". , 138, .
VB. Web-, VB. :
cmdTry ""
txtNumber ,
txtMessage "", "" " "
txtNumberTry
:
Dim A As Long ' -
Dim SecretNumber As Long '
' :
Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
Randomize()
SecretNumber = Math.Round(1000000000 * Rnd()) '
txtNumber.Text
= 0 '
txtMessage.Text = " " '
txtNumberTry.Text = 0 '
End Sub
' :
Private Sub cmdTry_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles cmdTry.Click
A = Val(txtNumber.Text) '
If A > SecretNumber Then ' If
txtMessage.Text
= ""
ElseIf A < SecretNumber Then
txtMessage.Text = ""
Else
txtMessage.Text = " "
End If
txtNumberTry.Text = Val(txtNumberTry.Text) + 1
End Sub
. , Web-.
Web-. , , . 23.4.
. 23.4
VBScript. HTML- . . VB, VBScript. VB. HTML- VB . , VBScript VS. , , VS . , , Internet Explorer. , , Internet Explorer Windows. , Windows .
Internet Explorer HTML- , , VB Start. Internet Explorer. .
, Internet Explorer.
HTML- :
<html>
<body bgcolor="#FFDFFF">
<h1> " "</h1>
<img src=".jpg"><p>
堠 <input type="text" size="20" name="txtNumber">
1 ""<p>
<input type="button" name="cmdTry" value=""><p>
- <input type="text" size="30" name="txtMessage"><p>
- <input type="text" size="10" name="txtNumberTry" ><p>
<i> 30 - </i>
<script language="VBScript"><!-- '
dim A ' -
dim SecretNumber '
Randomize
SecretNumber = Round (1000000000 * Rnd)
' :
txtNumber.Value=0
txtMessage.Value = " "
txtNumberTry.Value=0
' :
Sub cmdTry_OnClick()
A = int(txtNumber.Value) '
if A>SecretNumber then
txtMessage.Value = ""
elseif A<SecretNumber then
txtMessage.Value = ""
else
txtMessage.Value = " "
end if
txtNumberTry.Value= txtNumberTry.Value + 1
End Sub
--></script>
</html>
:
<script language="VBScript"><!--
--></script>
VB. . , VB. , Dim. Object. Text Value. Click OnClick. Val Int.
, :
cmdTry ""
txtNumber ,
txtMessage "", "" " "
txtNumberTry
, VB ? , HTML. VBScript , , .
HTML- . :
堠 <input type="text" size="20" name="txtNumber">
1 ""<p>
, Web- .
<input type="text" size="20" name="txtNumber">
Web- . , , , , , 堠 input type="text", 20 젠 size="20", name="txtNumber".
, HTML-
<input type="button" name="cmdTry" value=""><p>
Web- ( input type="button"). 젠 value="".
.
(NumericUpDown)
. , . 18.14.
. 18.14
: NumericUpDown1 NumericUpDown2. , .
:
| Numeric
UpDown1 | Numeric
UpDown2 | ||||||
| Minimum | 0 | 0 | |||||
| Maximum | 100 | 1000 | |||||
| DecimalPlaces | 0 | 2 | |||||
| Increment | 1 | 0,01 |
. , . , Enter.
NumericUpDown.Value Decimal. ValueChanged.
, :
7.
, NumericUpDown .
. . , .
, , .
, , CD-R, CD-RW, -. , , CD-ROM DVD-ROM, , .
, , , , . - , , .
4 .
1. .
. .
, , , . .
, , , , . , . , .
2. -(CD-ROM) DVD-ROM. , . .
, , , ( 700 CD-ROM 5-10 DVD-ROM). , , , . , , .
3. - (CD-R) (CD-RW). - (CD-R) (CD-RW) . () . , , -, - , .
DVD- , 2005 .
, 2 3, , .
4. -. . . . . . . - , .
. . , , , , , . , , , -, . , .
, (. . 1).
. 1
, . : ( ), ( ), , () -. , , , ..
. , - . , , , .
, , .
(Char) Char
Char. , , .
, 1. :
Dim s As String = ""
Dim c As Char = ""
.
Char. System Char, . 14.3.1. :
Dim As Char = ""
Debug.WriteLine(" 렠 " & )
Debug.WriteLine(" ? " & Char.IsDigit())
Debug.WriteLine(" ? " & Char.IsLetter())
Debug.WriteLine(" , ? " & Char.IsLetterOrDigit())
Debug.WriteLine(" ? " & Char.IsLower())
Debug.WriteLine(" ? " & Char.IsUpper())
Debug.WriteLine(" ? " & Char.IsPunctuation())
Debug.WriteLine(" ? " & Char.IsSeparator())
Debug.WriteLine(" " & Char.ToLower())
Debug.WriteLine(" " & Char.ToUpper())
:
렠
? False
? True
, ? True
? False
? True
? False
? False
Unicode . Char 2 , Windows 65536 . Unicode. 0 65535. Unicode AscW Strings. ChrW :
|
|
|
|
|
AscW ("") |
1064 |
1064 |
|
ChrW (1064) |
|
1064 |
Private Sub Button4_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button4.Click
Dim As Long
Dim As Char
For = 0 To 1200
= ChrW()
Debug.Write()
If Mod 64 = 0 Then Debug.WriteLine("")
Next
End Sub
, :
!"#$%&'()*+,-./0123456789:;<=>?@
ABCDEFGHIJKLMNOPQRSTUVWXYZ[\]^_`abcdefghijklmnopqrstuvwxyz
{|}~¡¢£¥¨ª¯²³´¸¹º¼½¾¿À
ÁÂÃÄÅÆÇÈÉÊËÌÍÎÏÐÑÒÓÔÕÖ×ØÙÚÛÜÝÞßàáâãäåæçèéêëìíîïðñòóôõö÷øùúûüýþÿA
????????????????????????????????????????????????????????????????
????????????????????????????????????????????????????????????????
?
?
, , , . . 1200- , , , , :
? ? ? ? ? ?????????? ? ? ? ? ? ? ? ? ? ?
???????????????????? ?????????????????????????????????
?OO0???+?>?????????????????????????????
?????????????????????????????????????????
????????????? ??????dd????
ASCII . Char 1 , 256. ASCII-. , 128 255 . - ASCII-. . ASCII- Asc Strings. Chr :
|
|
|
|
|
Asc ("") |
219 |
219 |
|
Chr (219) |
|
219 |
Private Sub Button6_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button6.Click
Dim As Long
For = 32 To 255
Debug.Write(Chr())
Next
End Sub
:
!"#$%&'()*+,-./0123456789:;<=>?@
ABCDEFGHIJKLMNOPQRSTUVWXYZ[\]^_`abcdefghijklmnopqrstuvwxyz
{|}~
, () , Unicode .
VB
VB. , | , , VB. [] , , , , , .
, (, ), .
:
Public | Private | Protected | Friend | Protected Friend
:
[ | Static ] [ Shared ] [ Shadows ] [ ReadOnly ]
[ Dim ] [ WithEvents ] [ ( ) ]
[ As [ New ] ] [ = ]
:
[ ] [ Shadows ] Const
[ As ] =
, , , . . , , , .
:
[ Overloads | Overrides | Overridable | NotOverridable | MustOverride | Shadows | Shared ] [ ] Sub
[ ( ) ]
End Sub
:
[ Overloads | Overrides | Overridable | NotOverridable | MustOverride | Shadows | Shared ] [ ] Function [ ( ) ] [ As ]
End Function
:
[ ] [ ReadOnly | WriteOnly ] [ Overloads | Overrides | Overridable | NotOverridable | MustOverride | Shadows | Shared ] Property
[ As ]
[ Get
End Get ]
[ Set ( ByVal As )
End Set ]
End Property
:
[ ] [ Shadows ] Event
:
[ ] [ Shadows ] Enum
[ =
]
[ =
]
. . . . . . . .
End Enum
:
[ ] [ Shadows ] Structure
End Structure
:
[ ] [ Shadows ] [ MustInherit | NotInheritable ] Class [ Inherits ]
End Class
:
[ Public | Friend ] Module
End Module
, , , , .
.NET Framework, . , , . , ( ) , .NET Framework? , .
22.14.1 . . , :
, , , ..
Toolbox .
-, . .
, Web- . Toolbox Microsoft WebBrowser. . AxWebBrowser1. . :
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
AxWebBrowser1.Navigate("http://www.yahoo.com/")
End Sub
Navigate AxWebBrowser1. , VB . -.
, , (. . 23.2).
. 23.2
, .
, , , . , , , VB. AxWebBrowser1, :
Busy. True, .
DocumentComplete. , .
Stop. , Web-.
, Internet Explorer , , .
, VB (E-mail), Internet Explorer, , ..
19.
-. , .
,
, (6.1.2) (15.8). . , .
. .
, , VB . . ? , , , . , , , . ,
Me.BackColor = Color.Aquamarine
.
, , , .
: .txt - , , 10. , , . . , . , 10, , .
:
1. , .
2. , , . .
. 1 .
:
', :
Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
Dim As New System.IO.StreamReader("E:\VB\.txt")
= .ReadLine ' ,
.Close()
End Sub
' ,
Private Sub Timer1_Tick(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Timer1.Tick
Debug.WriteLine() '
= + 1 '
End Sub
', :
Private Sub Form1_Closed(ByVal sender As Object, ByVal e As System.EventArgs) Handles MyBase.Closed
Dim As New System.IO.StreamWriter("E:\VB\.txt")
.WriteLine() ' ,
.Close()
End Sub
Closed. .
- . . . , , . , , , , . - . , , , , - , , . . , , , --. , .
13.
. 1 . . . , , , . , . , . , , , , .
(Index)
. : . , , . HTML-, . HTML-, , , HTML- .
. HTML Help Workshop Index. , ( ). Index.hhk. , .
Index (Insert a keyword) , . , Keyword . , HTML- , Add. . Browse, HTML- .htm. , Add.
. . 26.7 Index.
. 26.7
(Sort keywords alphabetically), ( ).
(Search) ( ), .
Microsoft RTF, HTML. Visual Studio .NET HTML Help Workshop. VS 4.1, Windows. . , . 26.3, .
File New. (. 26.2), , .
. 26.2
. . , . Project. .
, , , RTF HTML. , , , Next.
Browse . , , , Help , . , . (, .hhp). .
, . , Next.
Finish. . . HTML Help Workshop (. 26.3).
. 26.3
, , . . , , .
. VB , , . (field) , Public Friend:
Public C As Integer = 10
(Properties) Property , 22.5. .
, . .
, . . .
. - . ( ). .
, , , (, ), , (, ).
. 5 3 . :
5 , :
TextBox1
TextBox2
TextBox3
TextBox4
TextBox5 1
1 1, ( ).
Private Sub _()
= 2 * ( + )
End Sub
Private Function _() As Integer
_()
Return * _
End Function
Public Function ___() As Integer
Return ____ * _()
End Function
End Class
: , . , , . , :
Dim 1 As New
( ):
Dim 1, 2 As
:
1 = New ꠠ '
. 5 , Public. , . , . Public ( ) . , -. ! ? , . .
. , , . , . .
, , . , . 1 , .
_ . Private, , . - , Private Public. Private , . .
_ . Private .
___ , ( Button3_Click, ), Public. , .
? , , , , , , , , , . , , .
. , , , , , .
, . , , . , , , , , , .
. . . 1. , . 2 , 200 .
:
:
Dim (100) As
Dim k As Integer = 1
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
(k) = New
(k)._ = k
(k). = TextBox1.Text
(k). = TextBox2.Text
(k). = TextBox3.Text
(k)._ = TextBox4.Text
(k).____ = TextBox5.Text
k = k + 1
End Sub
Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click
Dim i As Integer
For i = 1 To k - 1 ' ⠠ k-1
If (i)._ > 200 Then Debug.WriteLine((i).)
Next
End Sub
:
Public Class
Public _ As Integer
Public As String
Public , As Integer
Public _ As Integer
Public ____ As Integer
Private As Integer
Private Sub _()
= 2 * ( + )
End Sub
Private Function _() As Integer
_()
Return * _
End Function
Public Function _() As Integer
Return ____ * _()
End Function
End Class
: (1 2) 101 :
Dim (100) As
100 , .
1 k
k = k + 1
(k) = New
.
_. , , , , (8), , 8. , : , , ?!
. , ! . . . , .NET Framework. . , , .
6.1.
.NET Framework : . , , , . Math System. , , , ( ), . Pen. Pen, Pen:
Dim As New Pen(Color.Red, 20) '
, . .
. . : Project Add New Item Add New Item (. 21.1) Class Open. , Solution Explorer Class1.vb, Class1.vb, :
Public Class Class1
End Class
, .
( , ) :
Public Class
Public
C1 As Integer = 2281
Public
Sub ()
Debug.WriteLine(2004)
End Sub
End Class
C1 Dim
Public. , C1 , . . , , , , . , , , . , , , . .
. :
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Dim As New
Debug.WriteLine(.C1)
.()
End Sub
, , :
2281
2004
. New. . ( ) .
, , , C1, .
___.dll. Windows Control Library, ___. . _, . Project Add New Item Add New Item (. 25.5) User Control _ Open. , Solution Explorer _.vb _.vb.
. 25.5
Inherits System.Windows.Forms.UserControl
UserControl, . , :
Inherits Button
. . , (. 25.6).
. 25.6
, . ( - , .)
, 22.14.1 New, . , (Image) , . Text .
:
Public Class _
Inherits Button
Windows Form Designer generated code
End Class
, 22.14.1:
Public Class _
Inherits Button
Windows Form Designer generated code
Public ReadOnly Property _() As Integer
Get
Return ___
End Get
End Property
Private ___ As Integer = 0
Public ReadOnly Property () As Boolean
Get
Return _
End Get
End Property
Private _ As Boolean = False
Public Event _()
Private Sub __Click( ByVal sender As Object, ByVal e As System.EventArgs) Handles MyBase.Click
___ = ___ + 1
Me.Text = ___ & " ."
If ___ = 10 Then
RaiseEvent _()
_ = True
End If
End Sub
Public Sub (ByVal As Integer)
Me.Left = Me.Left +
End Sub
End Class
, , .
. New, , Windows Form Designer generated code. , 6.1.3. :
Public Sub New()
MyBase.New()
'This call is required by the Windows Form Designer.
InitializeComponent()
'Add any initialization after the InitializeComponent() call
J
End Sub
, , .
ListView ,
ListView (. . 20.11).
. 20.11
, . , ListBox, , .
. ListView. ListView1. LV.
View Details. .
CheckBoxes True. .
, , ImageList . ListView, SmallImageList ListView.
GridLines True. . , . .
. Columns, , . Columns. ( . 20.12 ). .
. 20.12
. (20.6). Add, ListView . Members Columns. . . Remove . , (Name) (Text), . 20.11.
. 20.13.
. 20.13
. ListView ListViewItem. - Items ListView. Items ListView. ( . 20.14 ). .
. 20.14
(20.6). Add, ListView . Members Columns. . Remove . . . Text ImageIndex ( StateImageIndex ).
ListView .
. 4 ListViewItem. . , . . . . . SubItems. SubItems ( . 20.15 ). , .
. 20.15
. Add Text, ListView, , .
4 , . , . 20.11.
ListViewItem SubItems. 4 , 4 . , SubItems. Items SubItems. , Items , SubItems .
cls.
. . , : , . , , , . , - , , , , . ? , .
. pict. pict(10) . - , . . , . , .
pict .
. :
:
Module Module1
Public As Form1
Public As cls ' cls
Public Const _ As Integer = 20
End Module
:
Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
= Me
= New cls ' cls
_()
End Sub
Private Sub _()
_.Text = 0 '
._() '
End Sub
cls:
Public Class cls
Private x As Integer '
Private y As Integer
Public Sub New()
.pict.Width = _
.pict.Height = _
End Sub
Public Sub _() '
' :
x = ..Left + ..Width * 1 / 4
y = ..Top + ..Height / 2 '
____()
End Sub
Private Sub ____()
.pict.Left = x
.pict.Top = y
End Sub
End Class
. , .
.
, .
Form1_Load. ,
= Me
(. 21.2).
cls . New . pict _. (), (), pict.
_, , , . , . , . , _ _ . , - , .
____, . , , . . , ..Left . , .
, .
, . , , , . 17.7. , , , , . , , .
. 17.7
, :
Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
Dim As Graphics = Me.CreateGraphics
Dim As New Drawing2D.GraphicsPath
.AddArc(20, 30, 120, 120, 0, 330)
.AddArc(220, 30, 10, 10, 270, 180)
.CloseFigure()
.AddEllipse(90, 50, 30, 30)
Me.Region = New Region()
End Sub
: . , . Region, , . . . Region( Region). , . ( ) . , , . Region Region, . , .
, .
. , , . . . .
. , , ! , . . , , . , . - .
? , , ! , . , - , :
Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click
Me.Close()
End Sub
.
-
. 1 , 2 . , -, , , . - , , .
:
:
Module Module1
Public 1 As New Form2
Public 2 As New Form2
End Module
1:
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
1.Show()
2.Show()
End Sub
2:
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Me.BackColor = Color.Blue
End Sub
Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click
Me.BackColor = Color.Red
End Sub
Private Sub Button3_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button3.Click
1.Text = "1"
1.BackColor = Color.Black
2.Text = "2"
2.BackColor = Color.White
End Sub
, 1, - . Form2. , . , . Me. .
, , .
, . . :
:
Module Module1
Public 1 As New
Public 2 As New
End Module
:
Public Class
Public C As Integer = 10
Public Sub ()
1.C = 101
2.C = 102
End Sub
End Class
:
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Debug.WriteLine(1.C)
Debug.WriteLine(2.C)
1.C = 1
2.C = 2
Debug.WriteLine(1.C)
Debug.WriteLine(2.C)
1.()
Debug.WriteLine(1.C)
Debug.WriteLine(2.C)
End Sub
, , :
10
10
1
2
101
102
, : 1 2. , . ? , . , , . C.
C 10, , , Button1_Click.
. C , , .
, . , . , , , -.
(Contents)
HTML Help Workshop Contents. (. 26.5), ( ).
. 26.5
Table of Contents.hhc. , .
. 26.6 . , Contents HTML Help Workshop. .
. 26.6
(Insert a page ) , . ( ). . , HTML- , Add. ( ). Browse, HTML- .htm.
, , HTML Help Workshop.
. (Insert a heading ), No . HTML-, .
. () , 4 , .
OleDbConnection, OleDbDataAdapter DataSet
. ADO.NET : OleDbConnection (), OleDbDataAdapter () DataSet. .
? - . . . OleDbConnection. , .
ADO.NET , . , - , . , , , , , . . , , - . , , , .
DataSet. , . DataSet OleDbDataAdapter. Fill DataSet, Update DataSet .
, , , DataSet, , , .
OleDbConnection OleDbDataAdapter. , - ( ) . , .
. VS Server Explorer, 24.4.1. ? Server Explorer . VB (password). Don't include password. , : OleDbConnection1 OleDbDataAdapter1 ( . 24.23).
! , OleDbDataAdapter . - , , .
. , , . Preview Data. Data Adapter Preview, Fill Dataset. . 24.21.
. 24.21
. . , - . . , .
, .
DataSet. DataSet. Generate Dataset. (. 24.22). DataSet1, , OleDbDataAdapter1.
. 24.22
. , DataSet11 ( . 24.23). , , .
, , . , - , , DataSet . . , Access (. 24.3) Server Explorer (. 24.16). . DataGrid. Toolbox ( . 24.23 . 24.24). DataSet, .
DataGrid. , , DataGrid, , . DataSource( ) DataSet11. (. . 24.23). DataGrid DataSet11. , DataGrid, DataSet11.
DataGrid . Caption , , Caption.
. 24.23
, , , . Fill DataSet. , , , . DataSet Update.
:
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
OleDbDataAdapter1.Fill(DataSet11)
End Sub
Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click
OleDbDataAdapter1.Update(DataSet11)
End Sub
. . (. 24.24).
. 24.24
, . , Access Server Explorer.
, Delete. .
, .
.
, Windows Application ( Windows), Class Library( ) . . 25.1. - , , . , Class1. , , _ :
Public Class _
Public Shared Sub 1()
MsgBox(1)
End Sub
Public Sub 2()
MsgBox(2)
End Sub
End Class
Public Module _
Public C As String
Public Function (ByVal A As Integer, ByVal B As Integer) As Integer
Return A + B
End Function
End Module
. , , , , , , , , , , .
. . , . , , , . , , , - . , , .
. Build Build Solution, VB BIN .dll. , , , 4.2.4. .
, , Object Browser. , .NET Framework. , _ _, , .
, .
__. 10. 1, 0, .
. , , . :
.
:
, , , 1 .
, , , .
, , , .
.
.
, , cls. , , _ cls.
, :
(1), (2), (10) , () .
, .
, :
10 . , 0.
.
.
. . cls . , : cls.
: .
:
Private Const _ As Integer = 10
Private (_) As cls ' cls
Public pict(_) As PictureBox '
Public __ As Integer
Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
= Me
KeyPreview = True '
_.ReadOnly = True
Randomize() '
' -:
= New cls
Dim i As Integer
For i = 1 To _
(i) = New cls
Next i
_()
Timer1.Enabled = False ' " "
End Sub
Private Sub __Click(ByVal sender As System.Object, ByVal e As System.EventArgs) _
Handles _.Click
_()
Timer1.Enabled = True ' ,
End Sub
Private Sub _()
_.Text = 0 '
__ = _
__.Text = _
_.Focus()
._() '
Dim i As Integer
For i = 1 To _
(i)._() '
Next i
End Sub
' , :
Private Sub Timer1_Tick(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Timer1.Tick
.() '
Dim i As Integer
For i = 1 To _
(i).() '
Next i
' , 1:
_.Text = _.Text + 1
If __ = 0 Then Timer1.Enabled = False '
End Sub
Private Sub Form1_KeyDown(ByVal sender As Object, ByVal e As System.Windows.Forms.KeyEventArgs) _
Handles MyBase.KeyDown
.__(e)
End Sub
cls .
cls:
Public Class cls
Private _ As Integer
Private Shared __ As Integer = 0
Private Const _ As Double = 12
Private x, y As Double '
Private dx, dy As Double '
Public Sub New()
__ = __ + 1
_ = __
' - :
.pict(_) = New PictureBox
' :
.pict(_).Width = _
.pict(_).Height = _
.pict(_).SizeMode = PictureBoxSizeMode.StretchImage
' PictureBox :
.pict(_).BackColor = Color.White
.pict(_).Image = Image.FromFile("MOON06.ICO")
.Controls.Add(.pict(_)) '
.pict(_).BringToFront() '
End Sub
Public Sub _()
Const _ As Double = 1.8 '
' :
x = ..Left + ..Width * 3 / 4
y = ..Top + ..Height / 2
____()
' :
dx = _ * (1 - 2 * Rnd()) ' _
dy = _ * (1 - 2 * Rnd()) ' _
End Sub
Private Sub ____()
.pict(_).Left = x
.pict(_).Top = y
End Sub
Public Sub () ' ,
If () Then ___() ' , ,
() ', ,
() ', ,
____()
End Sub
Private Sub ()
x = x + dx
y = y + dy
End Sub
Private Sub () '
If ___() Then dy = -dy '
If ___() Then dx = -dx '
End Sub
Private Function ___() As Boolean
If y < ..Top Or y + _ > ..Top + ..Height Then
Return True
Else
Return False
End If
End Function
Private Function ___() As Boolean
If x < ..Left Or x + _ > ..Left + ..Width Then
Return True
Else
Return False
End If
End Function
Private Function () As Boolean
Const As Double = 10 ' ,
'
' , :
If Math.Abs(x - .X - ((_ - _) / 2)) < _
And Math.Abs(y - .Y - ((_ - _) / 2)) < Then
Return True
Else
Return False
End If
End Function
Private Sub ___()
x = -10000 : y = -10000 '
dx = 0 : dy = 0 '
.__ = .__ - 1
.__.Text = .__
End Sub
End Class
. , . , , , , .
. , . , . .
. , PictureBox. cls, :
Public pict(_) As PictureBox '
:
Timer1.Enabled = True
,
Timer1.Enabled = False
.
, , . . , .
. . , , .
. _ .
, . , , . . dx dy x y, . , .
, . __Click VB _ . dx dy. Rnd 0 1, , dx, dy -1.8 1.8. , . , _.
x y .
___ ___ __.
. , , , , dy = -dy, . ! , dx = -dx . , _ = 30 _ = 1 , . dx dy, x y.
. , , . , 22.6. __, 1 , _ .
, PictureBox . 15.8. . , , .
.pict(_).SizeMode = PictureBoxSizeMode.StretchImage
, PictureBox PictureBox.
. , . . , . Private. _ . , .
. . . . , , .
. , , 100 1000. . ? (. 13.2).
, , , , , , .
, .NET Framework , , . , ? , . ? , . .
. , . . :
1. ( ),
2. .
. , Button1_Click Form1_BackColorChanged:
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Me.BackColor = Color.Aquamarine
End Sub
Private Sub Form1_BackColorChanged(ByVal sender As Object, ByVal e As System.EventArgs) _
Handles MyBase.BackColorChanged
MsgBox(" ")
End Sub
. , , , .
.
3. (, Windows . 22.15).
, . , : . , .
, , .
, - SQL-, DataSet. . , SQL-, , . , , , , .
:
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Dim As New OleDb.OleDbConnection _
("Provider=Microsoft.Jet.OLEDB.4.0; Data Source=C:\\.mdb")
.Open()
Dim As New OleDb.OleDbCommand(TextBox1.Text, )
.ExecuteNonQuery()
.Close()
End Sub
: OleDbConnection. (Provider) (Data Source) , . , . , :
Provider=Microsoft.Jet.OLEDB.4.0;Data Source=C:\\.mdb
. .
24.5.7. . (TextBox1.Text) , . .
.
, , .
, SQL- ( SELECT) , .
SQL- Access , , .
, , - , . 24.32 , . SQL- . , : OleDbConnection1, , , . , . , OleDbConnection1, -:
Private Sub Button4_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button4.Click
OleDbConnection1.Open()
Dim As New OleDb.OleDbCommand(TextBox1.Text, OleDbConnection1)
.ExecuteNonQuery()
OleDbConnection1.Close()
End Sub
. VB . . , , . : ( ) . . . , .
. (. ).
. , , , .
. 4. RTF, HTML.
File New. (. 26.2), HTML File. HTML- (. 26.4) (HTML Title). . HTML- <Title> </Title>.
. 26.4
HTML- . . <BODY> </BODY> . , . 26.1. , HTML 23. :
<BODY>
<H1> </H1>
, .
</BODY>
File Save File, .htm.
3 , File New File Save File.
TreeView ,
. TreeView. TreeView1. TV. Nodes( ) TreeView. ( . 20.17 ). .
. 20.17
. . , .
. , , , . , , .
. . . , , : . . . . . , .
, . TreeView ListView ImageList . : (SelectedImage) , .
, , ,
VB , Windows, : , , . File System.IO. Directory System.IO.
c: temp 222, 333, 666, 999 1.txt 2.txt.
. , StreamWriter, :
Dim As New System.IO.StreamWriter("E:\VB\Filimon.txt")
.
File:
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
' 1.txt temp c: 222 temp c:
File.Copy("c:\temp\1.txt", "c:\temp\222\1.txt")
' 1.txt , 222:
File.Copy("c:\temp\1.txt", "c:\temp\222\1.txt", True)
' 1.txt 3.txt temp c: 222 temp c:
File.Copy("c:\temp\1.txt", "c:\temp\222\3.txt")
' 1.txt 4.txt temp c: :
File.Copy("c:\temp\1.txt", "c:\temp\4.txt", True)
' 1.txt temp c: 333 temp c:
File.Move("c:\temp\1.txt", "c:\temp\333\1.txt")
' 3.txt 5.txt 222 temp c: temp c:
File.Move("c:\temp\222\3.txt", "c:\temp\5.txt")
' 4.txt temp c: 6.txt:
File.Move("c:\temp\4.txt", "c:\temp\6.txt")
' 5.txt temp c:
File.Delete("c:\temp\5.txt")
' 6.txt temp c:, .....
If File.Exists("c:\temp\6.txt") Then Debug.WriteLine(" ") _
Else Debug.WriteLine(" ")
End Sub
.
Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click
' 6.txt temp c: (Hidden):
File.SetAttributes("c:\temp\6.txt", FileAttributes.Hidden)
' 6.txt temp c:
Debug.WriteLine(File.GetAttributes("c:\temp\6.txt"))
' 6.txt temp c:
Debug.WriteLine(File.GetCreationTime("c:\temp\6.txt"))
' 6.txt temp c:
Debug.WriteLine(File.GetLastAccessTime("c:\temp\6.txt"))
' 6.txt temp c:
File.SetLastWriteTime("c:\temp\6.txt", #11/21/2004 10:42:00 PM#)
' 6.txt temp c:
Debug.WriteLine(File.GetLastWriteTime("c:\temp\6.txt"))
End Sub
: SetAttributes
(, ), GetAttributes .
. Directory:
Private Sub Button3_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button3.Click
' temp c: 444:
Directory.CreateDirectory("c:\temp\444")
' temp c: 444, :
Directory.Delete("c:\temp\444")
' 222 temp c:, .....
If Directory.Exists("c:\temp\222") Then Debug.WriteLine(" ") _
Else Debug.WriteLine(" ")
' 666 temp c: 222 temp c:
Directory.Move("c:\temp\666", "c:\temp\222\666")
' 666 777 222 temp c: temp c:
Directory.Move("c:\temp\222\666", "c:\temp\777")
' 777 555:
Directory.Move("c:\temp\777", "c:\temp\555")
End Sub
: Move . . , , .
.
Private Sub Button4_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button4.Click
' 333 temp c:
Directory.SetLastAccessTime("c:\temp\333", #3/28/2003 10:22:00 AM#)
' 333 temp c:
Debug.WriteLine(Directory.GetLastAccessTime("c:\temp\333"))
' 333:
Debug.WriteLine(Directory.GetCreationTime("c:\temp\333"))
' 333 temp c:
Debug.WriteLine(Directory.GetLastWriteTime("c:\temp"))
', 333:
Debug.WriteLine(Directory.GetParent("c:\temp\333"))
End Sub
.
Private Sub Button5_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button5.Click
' ( ):
Debug.WriteLine(Directory.GetCurrentDirectory)
' 999 temp c:
Environment.CurrentDirectory
= "c:\temp\999"
' 999:
File.Copy("44.txt", "55.txt")
End Sub
: . . . , , : .
CurrentDirectory Environment System.
, , BIN .
:
', temp c:
Dim () As String = Directory.GetDirectories("c:\temp")
Dim As String
For Each In
Debug.WriteLine()
Next
', temp c:
Dim () As String = Directory.GetFiles("c:\temp")
Dim As String
For Each In
Debug.WriteLine()
Next
', :
Dim () As String = Directory.GetLogicalDrives
Dim As String
For Each In
Debug.WriteLine()
Next
: , , . GetDirectories , GetFiles , GetLogicalDrives . , For Each.
Toolbox _, . , , !. .
. , , , Windows, Windows Application ( Windows). Windows, (Control), Windows Control Library ( Windows) . . 25.1.
. 25.1
___ . (. 25.2). , . , , UserControl . , , , (User Control Designer).
. 25.2
User Control, , Toolbox. !. . , . 25.4.
. :
Public Class UserControl1
Inherits System.Windows.Forms.UserControl
Windows Form Designer generated code
End Class
, UserControl1, System.Windows.Forms.UserControl. (, ), : , ..
UserControl1 _.
. , MouseEnter, , . . _ Events, MouseEnter. . :
VB
VB . , Access, . , VB .
. Solution Explorer References (Add Reference) (25.2.2). COM Add Reference Microsoft ADO Ext. 2.7 for DDL and Security, Select OK. ADOX, Catalog Create. :
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Dim As ADOX.Catalog = New ADOX.Catalog
.Create _
("Provider=Microsoft.Jet.OLEDB.4.0;Data Source=C:\\.mdb;Jet OLEDB:Engine Type=5")
End Sub
(24.5.9). . C:\\.mdb. .
, . . , , . .
VB
VB 24.5.8. , , Access. Access , .
. bin , . :
Public As New OleDb.OleDbConnection _
("Provider=Microsoft.Jet.OLEDB.4.0;Data Source =.mdb")
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
.Open()
Dim As New OleDb.OleDbCommand ("CREATE TABLE ( COUNTER CONSTRAINT
PRIMARY KEY,Avtor STRING,Nazvanie STRING, Data DATETIME, Kol_str INTEGER)", )
.ExecuteNonQuery()
.Close()
End Sub
, , . , , . .mdb.
.
Dim. , . , , . , . , , : Edit Advanced Word Wrap.
.
, .
. . . .
Access
. Microsoft Access
.mdb.
. (. 24.1), .
. 24.1
. , (. 24.2).
. 24.2
. , VB, , . .
. Access . . . ( ). . . ( . 24.4).
. (. 24.3). ( ) ().
. 24.3
, Access .
. Access (. 24.4).
. 24.4
- ,
.
. , , : , . , , , . . , ? , , , , . Access , , .
, . . . .
, , . . , , , . .
, , . , Access . , . , , , Access, . , . . : ?
, .
VB
VB. . VB : .
Web- VB
Windows VS 4.1, Web-, VBScript. VB! , . , , .
VB , VB , Web-(WebApplication).
VS. : File New Project. , , , Windows, Windows Application ( Windows). Windows, Web-, ASP.NET Web Application (. 23.7).
. 23.7
. (. 23.8).
. 23.8
Windows. , Web- , Web-. Toolbox , , . , , . , , . , . , .
Web- , . - . , Size, Font.
Solution Explorer Web- WebForm1.aspx , , .aspx (. 23.9).
. 23.9
. , . 23.10.
. 23.10
Page_Load Form_Load Windows. . - , :
Button1.BackColor = Color.Yellow
. , Internet Explorer Web-. , . .
. , , , :
Label1.Text = "!"
. .
, VB Web-. . , Windows, .
Page_Load:
Imports System.IO
Public Class WebForm1
Inherits System.Web.UI.Page
Web Form Designer generated code
Private Sub Page_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
Button1.BackColor = Color.Yellow
Dim As String = "C:\INFORMAT.TXT"
Dim As Integer
If Not File.Exists() Then
Dim As New StreamWriter()
.WriteLine(0)
.Close()
End If
Dim As New StreamReader()
= .ReadLine
.Close()
If = 0 Then
Label2.Text = " "
Else
Label2.Text = " " & & " ."
End If
= + 1
Dim 1 As New StreamWriter()
1.WriteLine()
1.Close()
End Sub
End Class
: If , , , 0. . If 2.
= + 1
, .
. .
Web-, Web- Visual Basic .NET, , . , , HTML XML. .
Web-
Web- " ". . Internet Explorer , . 23.3.
. 23.3
VB . Notepad ( Windows). :
<html>
<body bgcolor="#FFDFFF">
<h1> " "</h1>
<img src=".jpg"><p>
<i> 30 - </i>
</html>
:
Web-, HTML.
HTML <html> </html>.
ࠠ <body bgcolor="#FFDFFF"> ( 16- ( A F. 6 )). , .
<h1> , . <h2> . , , . , , .
ࠠ <img src=".jpg"><p> (img), (src) .jpg, , HTML-. <p> Web-.
<i> , , .
HTML- Web-. HTML- htm html. , Web- , , . , File Open. , , , , , Web-.
, Web- HTML-. Web- ( ) Microsoft Word FrontPage, , , VB . HTML- . , , , . Internet Explorer, HTML- View Source. Web-.
HTML. . - :
<html>
<h1> " "</h1>
</html>
htm html. HTML-. , . HTML- , , (Refresh). HTML-. HTML- .
, , , , . , . .
(ListBox, ComboBox, CheckedListBox)
. Toolbox : ListBox, ComboBox, CheckedListBox. , - .
1. ., ., Visual Basic .NET, , . , 2003.
. , , .
2. , Visual Basic .NET 24 , , 2002.
, .
3. , . Visual Basic .NET. , . , 2002.
. .
4. Visual Basic .NET, , . -, 2002.
.
5. .. Visual Basic. , , -, 2003.
Visual Basic 6.0. .
6. .. " : Visual Basic 5", , -, 1998.
7. , " Visual Basic 6", "", 1999.
, , . , , . DrawCurve , . , , (tension). , , , . 17.5. , . , 0,5.
4 - 5 :
Dim As Graphics = Me.CreateGraphics
Dim _() As Point = {New Point(50, 20), New Point(70, 10), New Point(30, 100), _
New Point(70, 100), New Point(80, 80)}
.DrawCurve(Pens.Black, _, 0)
.TranslateTransform(100, 0) '
.DrawCurve(Pens.Black, _, 0.3)
.TranslateTransform(100, 0) '
.DrawCurve(Pens.Black, _, 0.5)
.TranslateTransform(100, 0) '
.DrawCurve(Pens.Black, _, 0.8)
(. 17.5).
. 17.5
: , .
, . , .
, , .
DrawPolygon DrawClosedCurve .
FillPolygon FillClosedCurve .
Splitter
Windows - . Splitter.
- ____. , . . - - . ? , , - . , . , . .
, , :
Public Shared ____ As Integer
Shared . .
:
.____ = TextBox5.Text
Debug.WriteLine(.____)
, , . , . , - , -:
(k).____ = TextBox5.Text
Debug.WriteLine((i).____)
. ____, .
, . Shared:
Public Shared Function () As Integer
. Math System. , .
, Private. .
, , , , .
: , ? , , . : .
