vbnet實驗代碼的簡單介紹

vb.net 四則運算代碼

Dim s1!, s2!, a$ '為小數點的疊加，s1,s2必須定義為單精度型

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Dim flag As Boolean 'flag它是過程及的變量，在通用里必須聲明

'在數字按鈕控件單擊數組單擊事件中獲取操作數（沒有區分是哪一個操作數）

Private Sub Command1_Click(Index As Integer)

x = Text1.Text

If flag = True Or x = "0" Then '查看數字是否輸入完畢或者是否清零了

Text1.Text = CStr(Index) 'CStr將數值轉換字符

Else

Text1.Text = Text1.Text + CStr(Index) '"+"在這里這個是對字符串的操作的疊加，CStr(Index)是接的數據

End If

flag = False '時刻準備數字的輸入

End Sub

'2.單擊運算符，確定s1，并且要選定運算

Private Sub Command2_Click(Index As Integer)

flag = True

s1 = Val(Text1.Text)

Select Case Index

Case 0

a = "+"

Case 1

a = "-"

Case 2

a = "*"

Case 3

a = "/"

End Select

End Sub

'3."="的單擊事件

Private Sub Command3_Click()

flag = True

s2 = Val(Text1.Text)

Select Case a

Case "+"

Text1.Text = s1 + s2

Case "-"

Text1.Text = s1 - s2

Case "*"

Text1.Text = s1 * s2

Case "/"

Text1.Text = s1 / s2 '分母不能為0

End Select

s1 = 0: s2 = 0: a = ""

End Sub

'4.清屏

Private Sub Command4_Click()

Text1.Text = "0"

s1 = 0

s2 = 0

a = ""

flag = False

End Sub

'5.刪除最后輸入的一個字符，換句話說，將本文框中的字符串取字符（從左往右取left(string,length)），將最后一個字符不取就先行

Private Sub Command5_Click()

If Text1.Text = "" Then

Else

Command5.Enabled = True

Text1.Text = Left(Text1.Text, Len(Text1.Text) - 1)

'len求字符串的長度，left(text1.len(text1)-1減1是取字符串從左往右減去一個字符串

End If

End Sub

'小數點 1）顯示出"."(注意前面輸入過的整數必須顯示) 2）小數后能繼續接受數字的輸入

Private Sub Command6_Click()

Text1 = Text1 "."

End Sub

'7加入正負號--單擊“+、-”,產生一個"-"，而且處于一種等待數字輸入的一種狀態

Private Sub Command7_Click()

Dim temp As Double

temp = -Val(Text1.Text)

Text1.Text = temp

If d = " " Then s1 = temp Else s2 = temp

End Sub

Private Sub Command8_Click() '退出

End

End Sub

Private Sub Form_Load() '窗體初始化

Text1.Text = 0

Text1.Locked = True

End Sub

求vb.net的源代碼，最好說明其解決問題，越多越好，滿意加50分。

下面這段代碼，是我用來計算每個月存500元進銀行，連續30年，最后連本帶利能有多少錢。這里面涉及復利計算。界面中右邊的文本框用來輸出每一次計算的結果。

Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click

? Dim nianxian As Integer '年限變量

? Dim dingcun As Integer '定存變量

? Dim fuli_big As Long '大復利

? Dim fuli_small As Long '小復利

? Dim i As Integer '循環變量

? Dim DATAstring As String '數據字符串

? nianxian = Val(年限_TextBox.Text)

? dingcun = Val(定存_TextBox.Text)

? DATAstring = ""

? For i = 1 To nianxian

? ? ? fuli_small = dingcun * (1 + 0.1875)

? ? ? dingcun = fuli_small

? ? ? fuli_big = fuli_big + fuli_small

? ? ? DATAstring = DATAstring + "[" + Trim(Str(i)) + "]" + Str(fuli_big) + Chr(13) + Chr(10)

? ? ? 'DATAstring = DATAstring + "[" + Trim(Str(i)) + "]" + Str(fuli_small) + Chr(13) + Chr(10)

? Next

? 'fuli_big = fuli_small

? TextBox1.Text = DATAstring

? 結果_TextBox.Text = Str(fuli_big) + "元"

End Sub

用vb.net編寫記事本源代碼

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("請輸入要查找的字詞：")

Dim Where1 '獲取需要查找的字符串變量

Text1.SetFocus '文本框獲得焦點，以顯示所找到的內容Search = InputBox("請輸入要查找的字詞：")

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

If Where1 Then

'若找到則設置選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 '測試用

'否則給出提示

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 '查找的起始位置變量

Text1.SetFocus '文本框獲得焦點

StartMe = Text1.SelLength + Text1.SelStart + 1 '給變量賦值

Where2 = InStr(StartMe, Text1.Text, Search) '令其從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) "文本編輯器版本號1.0" Chr(13) "由西南財經大學天府學院" Chr(13) Space(5) "肖忠開發" Chr(13) Space(2) "copyright:天府學院"

End Sub

Private Sub allMenu_Click()

Text1.SelStart = 0

Text1.SelLength = Len(Text1.Text)

End Sub

Private Sub backcolorMenu_Click() '設置背景色代碼

Form1.CommonDialog1.Action = 3

Text1.BackColor = Form1.CommonDialog1.Color

End Sub

Private Sub colorMenu_Click() '改變文字顏色代碼

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() '字體菜單代碼

Form1.CommonDialog1.Flags = 3 Or 256

Form1.CommonDialog1.Action = 4

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

Form1.Text1.FontName = "宋體"

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 = "我的記事本" "--" "未命名"

sFileName = "未命名"

Text1.FontSize = 15

Text1.FontName = "宋體"

Text1.Text = ""

Else

Call saveAsMenu_Click

Form1.Caption = "我的記事本" "--" "未命名"

sFileName = "未命名"

Text1.FontSize = 15

Text1.FontName = "宋體"

Text1.Text = ""

End If

End Sub

Private Sub openMenu_Click() '打開文件代碼

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

Form1.Caption = "我的記事本"

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 = "宋體"

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 = "我的記事本"

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 = "宋體"

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 Sub

Private Sub pasteMenu_Click() '粘貼菜單代碼

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.EndDoc

End Sub

Private Sub saveAsMenu_Click() '另存為菜單代碼

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 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 Sub

Private Sub statusMenu_Click()

End Sub

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