vb.net纯代码（VBNET教程）

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本文目录一览：

• 1、用VB.NET程序编写代码
• 2、用vb.net编写记事本源代码
• 3、如何用vb.net获得网页的源代码
• 4、vb.net编写的贪吃蛇游戏，带代码的
• 5、VB.NET编写软件随开机启动代码

用VB.NET程序编写代码

Delphi代码如下：

procedure TForm1.Button1Click(Sender: TObject);

var

购物总价:Integer;

折扣:Extended;

begin

购物总价:=StrToInt(Edit1.Text);

if 购物总价250 then

begin

  折扣:=0;

end

else if 购物总价500 then

begin

  折扣:=0.05;

end

else if 购物总价1000 then

begin

  折扣:=0.075;

end

else if 购物总价2000 then

begin

  折扣:=0.1;

end

{

此段的折扣是多少？

else if 购物总价3000 then

begin

  折扣:=0.05;

end

}

else if 购物总价=3000 then

begin

  折扣:=0.15;

end;

ShowMessage('您享受的折扣是：'+FloatToStr(折扣)

    +' 原价：'+IntToStr(购物总价)

    +' 折后总价：'+FloatToStr(购物总价*(1-折扣)));

end;

用vb.net编写记事本源代码

Dim sFileName As String

Dim Search

Private Sub dateTimeMenu_Click()

Text1.Text = Now

End Sub

Private Sub deleteMenu_Click()

Text1.Text = Left(Text1.Text, Text1.SelStart) + Mid(Text1.Text, Text1.SelStart + Text1.SelLength + 1)

End Sub

Private Sub findMenu_Click()

Search = InputBox("请输入要查找的字词：")

Dim Where1 '获取需要查找的字符串变量

Text1.SetFocus '文本框获得焦点，以显示所找到的内容Search = InputBox("请输入要查找的字词：")

Where1 = InStr(Text1.Text, Search) '在文本中查找字符串

If Where1 Then

'若找到则设置选定的起始位置并使找到的字符串高亮

Text1.SelStart = Where1 - 1

Text1.SelLength = Len(Search)

' Me.Caption = Where1 '测试用

'否则给出提示

Else: MsgBox "未找到所要查找的字符串。", vbInformation, "提示"

End If

End Sub

Private Sub findNextMenu_Click()

Dim Where2

Dim StartMe As Integer '查找的起始位置变量

Text1.SetFocus '文本框获得焦点

StartMe = Text1.SelLength + Text1.SelStart + 1 '给变量赋值

Where2 = InStr(StartMe, Text1.Text, Search) '令其从上次找到的地方找起

If Where2 Then

Text1.SelStart = Where2 - 1

Text1.SelLength = Len(Search)

Else: MsgBox "未找到所要查找的字符串.", vbInformation, "提示"

End If

End Sub

Private Sub aboutMenu_Click()

MsgBox Space(2) "文本编辑器版本号1.0" Chr(13) "由西南财经大学天府学院" Chr(13) Space(5) "肖忠 开发" Chr(13) Space(2) "copyright:天府学院"

End Sub

Private Sub allMenu_Click()

Text1.SelStart = 0

Text1.SelLength = Len(Text1.Text)

End Sub

Private Sub backcolorMenu_Click() '设置背景色代码

Form1.CommonDialog1.Action = 3

Text1.BackColor = Form1.CommonDialog1.Color

End Sub

Private Sub colorMenu_Click() '改变文字颜色代码

Form1.CommonDialog1.Action = 3

Text1.ForeColor = Form1.CommonDialog1.Color

End Sub

Private Sub cutMenu_Click()

Clipboard.SetText Text1.SelText

Text1.Text = Left(Text1.Text, Text1.SelStart) + Mid(Text1.Text, Text1.SelStart + Text1.SelLength + 1)

End Sub

Private Sub exitMenu_Click()

End

End Sub

Private Sub fontMenu_Click() '字体菜单代码

Form1.CommonDialog1.Flags = 3 Or 256

Form1.CommonDialog1.Action = 4

If Len(Form1.CommonDialog1.FontName) = 0 Then

Form1.Text1.FontName = "宋体"

Else

Form1.Text1.FontName = Form1.CommonDialog1.FontName

End If

Form1.Text1.FontSize = Form1.CommonDialog1.FontSize

If Form1.CommonDialog1.FontBold = True Then

Form1.Text1.FontBold = True

Else

Form1.Text1.FontBold = False

End If

If Form1.CommonDialog1.FontItalic = True Then

Form1.Text1.FontItalic = True

Else

Form1.Text1.FontItalic = False

End If

Text1.ForeColor = Form1.CommonDialog1.Color

End Sub

Private Sub Form_Load()

Form1.Text1.Width = Form1.Width - 130

Form1.Text1.Height = Form1.Height

End Sub

Private Sub Form_Resize()

Form1.Text1.Width = Form1.Width - 130

Form1.Text1.Height = Form1.Height

End Sub

Private Sub help1Menu_Click()

Form1.CommonDialog1.HelpCommand = cdlHelpForceFile

Form1.CommonDialog1.HelpFile = "c:\windows\system32\winhelp.hlp"

CommonDialog1.ShowHelp

End Sub

Private Sub newMenu_Click()

If Len(Trim(Text1.Text)) = 0 Then

Form1.Caption = "我的记事本" "--" "未命名"

sFileName = "未命名"

Text1.FontSize = 15

Text1.FontName = "宋体"

Text1.Text = ""

Else

Call saveAsMenu_Click

Form1.Caption = "我的记事本" "--" "未命名"

sFileName = "未命名"

Text1.FontSize = 15

Text1.FontName = "宋体"

Text1.Text = ""

End If

End Sub

Private Sub openMenu_Click() '打开文件代码

If Len(Trim(Text1.Text)) = 0 Then

Form1.Caption = "我的记事本"

Form1.CommonDialog1.Filter = "文本文件|*.txt"

Form1.CommonDialog1.Flags = 4096

Form1.CommonDialog1.Action = 1

If Len(Form1.CommonDialog1.FileName) 0 Then

sFileName = Form1.CommonDialog1.FileName

Form1.Caption = Form1.Caption "--" Form1.CommonDialog1.FileTitle

Open sFileName For Input As #1

Text1.FontSize = 15

Text1.FontName = "宋体"

Do While Not EOF(1)

Line Input #1, Text$

All$ = All$ + Text$ + Chr(13) + Chr(10)

Loop

Text1.Text = All

Close #1

End If

Else

Call saveAsMenu_Click

Form1.Caption = "我的记事本"

Form1.CommonDialog1.Filter = "文本文件|*.txt"

Form1.CommonDialog1.Flags = 4096

Form1.CommonDialog1.Action = 1

If Len(Form1.CommonDialog1.FileName) 0 Then

sFileName = Form1.CommonDialog1.FileName

Form1.Caption = Form1.Caption "--" Form1.CommonDialog1.FileTitle

Open sFileName For Input As #1

Text1.FontSize = 15

Text1.FontName = "宋体"

Do While Not EOF(1)

Line Input #1, Text$

All$ = All$ + Text$ + Chr(13) + Chr(10)

Loop

Text1.Text = All

Close #1

End If

End If

End Sub

Private Sub pasteMenu_Click() '粘贴菜单代码

Text1.Text = Left(Text1.Text, Text1.SelStart) + Clipboard.GetText() + Mid(Text1.Text, Text1.SelStart + Text1.SelLength + 1)

End Sub

Private Sub printMenu_Click()

Form1.CommonDialog1.ShowPrinter

For i = 1 To CommonDialog1.Copies

Printer.Print Text1.Text

Printer.Print Text1.Text

Next

Printer.EndDoc

End Sub

Private Sub saveAsMenu_Click() '另存为菜单代码

If Len(Trim(Text1.Text)) 0 Then

Form1.CommonDialog1.DialogTitle = "保存文件"

Form1.CommonDialog1.InitDir = "D:\"

Form1.CommonDialog1.Filter = "文本文件|*.txt"

Form1.CommonDialog1.Flags = 2

Form1.CommonDialog1.ShowSave

If Len(Form1.CommonDialog1.FileName) 0 Then

sFileName = Form1.CommonDialog1.FileName

Open sFileName For Output As #1

whole$ = Text1.Text

Print #1, whole

Close #1

End If

End If

End Sub

Private Sub saveMenu_Click()

If Len(Trim(Text1.Text)) 0 Then

Form1.CommonDialog1.DialogTitle = "保存文件"

Form1.CommonDialog1.InitDir = "D:\"

Form1.CommonDialog1.FileName = "新建文本"

Form1.CommonDialog1.Filter = "文本文件|*.txt"

Form1.CommonDialog1.Flags = 2

Form1.CommonDialog1.ShowSave

If Len(Form1.CommonDialog1.FileName) 0 Then

sFileName = Form1.CommonDialog1.FileName

Open sFileName For Output As #1

whole$ = Text1.Text

Print #1, whole

Close #1

End If

End If

End Sub

Private Sub statusMenu_Click()

End Sub

如何用vb.net获得网页的源代码

Dim url As String=" 网址"

Dim httpReq As System.Net.HttpWebRequest

Dim httpResp As System.Net.HttpWebResponse

Dim httpURL As New System.Uri(url)

httpReq = CType(WebRequest.Create(httpURL), HttpWebRequest)

httpReq.Method = "GET"

httpResp = CType(httpReq.GetResponse(), HttpWebResponse)

httpReq.KeepAlive = False ' 获取或设置一个值，该值指示是否与

Internet资源建立持久连接。

Dim reader As StreamReader = _

New StreamReader(httpResp.GetResponseStream,

System.Text.Encoding.GetEncoding(-0))

Dim respHTML As String = reader.ReadToEnd() 'respHTML就是网页源代码

vb.net编写的贪吃蛇游戏，带代码的

需用VB实现，代码如下

'定义蛇的运动速度枚举值

Private Enum tpsSpeed

QUICKLY = 0

SLOWLY = 1

End Enum

'定义蛇的运动方向枚举值

Private Enum tpsDirection

D_UP = 38

D_DOWN = 40

D_LEFT = 37

D_RIGHT = 39

End Enum

'定义运动区域4个禁区的枚举值

Private Enum tpsForbiddenZone

FZ_TOP = 30

FZ_BOTTOM = 5330

FZ_LEFT = 30

FZ_RIGHT = 5730

End Enum

'定义蛇头及身体初始化数枚举值

Private Enum tpsSnake

SNAKEONE = 1

SNAKETWO = 2

SNAKETHREE = 3

SNAKEFOUR = 4

End Enum

'定义蛇宽度的常量

Private Const SNAKEWIDTH As Integer = 100

'该过程用于显示游戏信息

Private Sub Form_Load()

Me.Show

Me.lblTitle = "BS贪食蛇 — (版本 " App.Major "." App.Minor "." App.Revision ")"

Me.Caption = Me.lblTitle.Caption

frmSplash.Show 1

End Sub

'该过程用于使窗体恢复原始大小

Private Sub Form_Resize()

If Me.WindowState 1 Then

Me.Caption = ""

Me.Height = 6405 '窗体高度为 6405 缇

Me.Width = 8535 '窗体宽度为 8535 缇

Me.Left = (Screen.Width - Width) \ 2

Me.Top = (Screen.Height - Height) \ 2

End If

End Sub

'该过程用于重新开始开始游戏

Private Sub cmdGameStart_MouseDown(Button As Integer, Shift As Integer, X As Single, Y As Single)

Beep

msg = MsgBox("您确认要重新开始游戏吗？", 4 + 32, "BS贪食蛇")

If msg = 6 Then Call m_subGameInitialize

End Sub

'该过程用于暂停/运行游戏

Private Sub chkPause_MouseDown(Button As Integer, Shift As Integer, X As Single, Y As Single)

If Me.chkPause.Caption = "暂停游戏(P)" Then

Me.tmrSnakeMove.Enabled = False

Me.tmrGameTime.Enabled = False

Me.picMoveArea.Enabled = False

Me.lblPauseLab.Visible = True

Me.chkPause.Caption = "继续游戏(R)"

Else

Me.tmrSnakeMove.Enabled = True

Me.tmrGameTime.Enabled = True

Me.picMoveArea.Enabled = True

Me.lblPauseLab.Visible = False

Me.chkPause.Caption = "暂停游戏(P)"

End If

End Sub

'该过程用于显示游戏规则

Private Sub cmdGameRules_MouseDown(Button As Integer, Shift As Integer, X As Single, Y As Single)

Beep

MsgBox " BS贪食蛇：一个规则最简单的趣味游戏，您将用键盘" Chr(13) _

"上的4个方向键来控制蛇的运动方向。在运动过程中蛇" Chr(13) _

"不能后退，蛇的头部也不能接触到运动区域的边线以外" Chr(13) _

"和蛇自己的身体，否则就游戏失败。在吃掉随机出现的" Chr(13) _

"果子后，蛇的身体会变长，越长难度越大。祝您好运！！", 0 + 64, "游戏规则"

End Sub

'该过程用于显示游戏开发信息

Private Sub cmdAbout_MouseDown(Button As Integer, Shift As Integer, X As Single, Y As Single)

Beep

MsgBox "BS贪食蛇" "(V-" App.Major "." App.Minor "版本)" Chr(13) Chr(13) _

"" Chr(13) Chr(13) _

"由PigheadPrince设计制作" Chr(13) _

"CopyRight(C)2002,BestSoft.TCG", 0, "关于本游戏"

End Sub

'该过程用于退出游戏

Private Sub cmdExit_MouseDown(Button As Integer, Shift As Integer, X As Single, Y As Single)

Beep

msg = MsgBox("您要退出本游戏吗？", 4 + 32, "BS贪食蛇")

Select Case msg

Case 6

End

Case 7

Me.chkWindowButton(2).Value = 0

Exit Sub

End Select

End Sub

'该过程用于拖动窗体_(点击图标)

Private Sub imgWindowTop_MouseDown(Button As Integer, Shift As Integer, X As Single, Y As Single)

ReleaseCapture

SendMessage Me.hwnd, WM_SYSCOMMAND, SC_MOVE, 0

End Sub

'该共用过程用于处理窗体控制按钮组的相关操作_(锁定、最小化、退出)

Private Sub chkWindowButton_MouseUp(Index As Integer, Button As Integer, Shift As Integer, X As Single, Y As Single)

If Button 1 Then Exit Sub

Select Case Index

Case 0 '锁定窗体

If Me.chkWindowButton(0).Value = 1 Then

Me.imgWindowTop.BorderStyle = 0

Me.imgWindowTop.Enabled = False

Else

Me.imgWindowTop.BorderStyle = 1

Me.imgWindowTop.Enabled = True

End If

Case 1 '最小化

Me.WindowState = 1

Me.chkWindowButton(1).Value = 0

Me.Caption = "BS贪食蛇 — (V-" App.Major "." App.Minor "版本)"

Case 2 '退出

Beep

msg = MsgBox("您要退出本游戏吗？", 4 + 32, "BS贪食蛇")

Select Case msg

Case 6

End

Case 7

Me.chkWindowButton(2).Value = 0

Exit Sub

End Select

End Select

End Sub

'该过程用于设置蛇运动速度的快慢

Private Sub hsbGameSpeed_Change()

Me.tmrSnakeMove.Interval = Me.hsbGameSpeed.Value

End Sub

'该过程用于通过键盘的方向键改变蛇的运动方向

Private Sub picMoveArea_KeyDown(KeyCode As Integer, Shift As Integer)

Select Case g_intDirection

Case D_UP

If KeyCode = D_DOWN Then Exit Sub

Case D_DOWN

If KeyCode = D_UP Then Exit Sub

Case D_LEFT

If KeyCode = D_RIGHT Then Exit Sub

Case D_RIGHT

If KeyCode = D_LEFT Then Exit Sub

End Select

g_intDirection = KeyCode

End Sub

'该计时循环过程用于计算游戏耗费的秒数并显示

Private Sub tmrGameTime_Timer()

g_lngGameTime = g_lngGameTime + 1

Me.lblGameTime.Caption = g_lngGameTime "秒"

End Sub

'该计时循环过程用于控制蛇的行动轨迹

Private Sub tmrSnakeMove_Timer()

Dim lngSnakeX As Long, lngSnakeY As Long, lngSnakeColor As Long

Dim lngPointX As Long, lngPointY As Long, lngPointColor As Long

Randomize

Me.picMoveArea.SetFocus

Me.picMoveArea.Cls

'确认蛇头的运动方向并获取新的位置

Select Case g_intDirection

Case D_UP '向上运动

g_udtSnake(SNAKEONE).Snake_CurX = g_udtSnake(SNAKEONE).Snake_OldX

g_udtSnake(SNAKEONE).Snake_CurY = g_udtSnake(SNAKEONE).Snake_OldY

g_udtSnake(SNAKEONE).Snake_CurY = g_udtSnake(SNAKEONE).Snake_CurY - SNAKEWIDTH

Case D_DOWN '向下运动

g_udtSnake(SNAKEONE).Snake_CurX = g_udtSnake(SNAKEONE).Snake_OldX

g_udtSnake(SNAKEONE).Snake_CurY = g_udtSnake(SNAKEONE).Snake_OldY

g_udtSnake(SNAKEONE).Snake_CurY = g_udtSnake(SNAKEONE).Snake_CurY + SNAKEWIDTH

Case D_LEFT '向左运动

g_udtSnake(SNAKEONE).Snake_CurX = g_udtSnake(SNAKEONE).Snake_OldX

g_udtSnake(SNAKEONE).Snake_CurX = g_udtSnake(SNAKEONE).Snake_CurX - SNAKEWIDTH

g_udtSnake(SNAKEONE).Snake_CurY = g_udtSnake(SNAKEONE).Snake_OldY

Case D_RIGHT '向右运动

g_udtSnake(SNAKEONE).Snake_CurX = g_udtSnake(SNAKEONE).Snake_OldX

g_udtSnake(SNAKEONE).Snake_CurX = g_udtSnake(SNAKEONE).Snake_CurX + SNAKEWIDTH

g_udtSnake(SNAKEONE).Snake_CurY = g_udtSnake(SNAKEONE).Snake_OldY

End Select

'根据新的位置绘制蛇头

lngSnakeX = g_udtSnake(SNAKEONE).Snake_CurX

lngSnakeY = g_udtSnake(SNAKEONE).Snake_CurY

lngSnakeColor = g_udtSnake(SNAKEONE).Snake_Color

Me.picMoveArea.PSet (lngSnakeX, lngSnakeY), lngSnakeColor

'移动蛇身体其他部分的位置

For i = 2 To g_intSnakeLength

g_udtSnake(i).Snake_CurX = g_udtSnake(i - 1).Snake_OldX

g_udtSnake(i).Snake_CurY = g_udtSnake(i - 1).Snake_OldY

lngSnakeX = g_udtSnake(i).Snake_CurX

lngSnakeY = g_udtSnake(i).Snake_CurY

lngSnakeColor = g_udtSnake(i).Snake_Color

Me.picMoveArea.PSet (lngSnakeX, lngSnakeY), lngSnakeColor

Next i

'更新蛇旧的坐标位置

For j = 1 To g_intSnakeLength

g_udtSnake(j).Snake_OldX = g_udtSnake(j).Snake_CurX

g_udtSnake(j).Snake_OldY = g_udtSnake(j).Snake_CurY

Next j

'判断蛇在移动中是否到了禁区而导致游戏失败

If m_funMoveForbiddenZone(g_udtSnake(SNAKEONE).Snake_CurX, g_udtSnake(SNAKEONE).Snake_CurY) Then

Beep

MsgBox "您的蛇移动到了禁区，游戏失败！", 0 + 16, "BS贪食蛇"

Me.tmrSnakeMove.Enabled = False

Me.tmrGameTime.Enabled = False

Me.picMoveArea.Visible = False

Exit Sub

End If

'判断蛇在移动中是否碰到了自己的身体而导致游戏失败

If m_funTouchSnakeBody(g_udtSnake(SNAKEONE).Snake_CurX, g_udtSnake(SNAKEONE).Snake_CurY) Then

Beep

MsgBox "您的蛇在移动中碰到了自己的身体，游戏失败！", 0 + 16, "BS贪食蛇"

Me.tmrSnakeMove.Enabled = False

Me.tmrGameTime.Enabled = False

Me.picMoveArea.Visible = False

Exit Sub

End If

'判断蛇是否吃到了果子

If m_funEatPoint(g_udtSnake(SNAKEONE).Snake_CurX, g_udtSnake(SNAKEONE).Snake_CurY) Then

'累加玩家的得分并刷新得分显示

g_intPlayerScore = g_intPlayerScore + 1

Me.lblYourScore.Caption = g_intPlayerScore "分"

Call m_subAddSnake '加长蛇的身体

Call m_subGetPoint '获取下一个果子的位置和颜色

Else

'绘制果子

lngPointX = g_udtPoint.Point_X

lngPointY = g_udtPoint.Point_Y

lngPointColor = g_udtPoint.Point_Color

Me.picMoveArea.PSet (lngPointX, lngPointY), lngPointColor

End If

End Sub

'该私有子过程用于初始化游戏

Private Sub m_subGameInitialize()

Erase g_udtSnake '清空蛇的结构数组

g_intPlayerScore = 0 '清空玩家的得分

g_lngGameTime = 0 '清空游戏耗费的秒数

g_intDirection = D_DOWN '设定蛇的初始运动方向为下

g_intSnakeLength = 4 '设定蛇的初始长度

ReDim g_udtSnake(1 To g_intSnakeLength) '重新定义蛇的长度

'定义蛇头部的数据

With g_udtSnake(SNAKEONE)

.Snake_OldX = 530

.Snake_OldY = 530

.Snake_Color = vbBlack

End With

'定义蛇身第2节的数据

With g_udtSnake(SNAKETWO)

.Snake_OldX = 530

.Snake_OldY = 430

.Snake_Color = vbGreen

End With

'定义蛇身第3节的数据

With g_udtSnake(SNAKETHREE)

.Snake_OldX = 530

.Snake_OldY = 330

.Snake_Color = vbYellow

End With

'定义蛇身第4节的数据

With g_udtSnake(SNAKEFOUR)

.Snake_OldX = 530

.Snake_OldY = 230

.Snake_Color = vbRed

End With

Me.picMoveArea.Visible = True

Me.lblYourScore.Caption = g_intPlayerScore "分"

Me.lblGameTime.Caption = g_lngGameTime "秒"

Me.tmrSnakeMove.Interval = Me.hsbGameSpeed.Value

Me.tmrSnakeMove.Enabled = True

Me.tmrGameTime.Enabled = True

Call m_subGetPoint '获取第一个果子的位置和颜色

End Sub

VB.NET编写软件随开机启动代码

要设置软件随开机启动，可以这样写通过写入注册表，来达到你要的效果：

在适当位置，插入如下代码：

Dim regname As RegistryKey = Registry.LocalMachine.OpenSubKey("SOFTWARE\\microsoft\\windows\\currentversion\\run", True)

regname.SetValue("自己软件的名称", """" Application.StartupPath "\ 自己软件的名称.exe""")

你把：“自己软件的名称” 替换成自己的应用程序的名称！！

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