visual basic學習筆記

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Visual Basic

學習檔案

老師：張銘棋

學生：黃新雅

座號：32

PDF 檔案使用 "pdfFactory Pro" 試用版本建立 www.ahasoft.com.tw/FinePrint

http://www.ahasoft.com.tw/FinePrint


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目錄

第四章表單的程式設計

4-1 溫度轉換 -----------------------------------------p6

4-2 國旗轉換 -----------------------------------------p7

第五章使用資料

5-1 顯示時間與日期 --------------------------------p8

5-2 顯示編碼 ----------------------------------------p9

5-3 簡易計算機 --------------------------------------p10

第六章流程控制選擇性執行程式

6-1 計算折扣 ------------------------------------------p12

6-2 猜數字遊戲 ---------------------------------------p13

6-3 數字比大小 ---------------------------------------p15

6-4 美餓美小吃店-點餐程式 -----------------------p16

第七章流程控制重複執行同一段程式

7-1 數字沙漏 ------------------------------------------p17

7-2 蟑螂進行曲 ---------------------------------------p18

7-3 電子時鐘 ------------------------------------------p19

7-4 統計成績 ------------------------------------------p20

7-5 數字金字塔 ---------------------------------------p21




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第八章陣列

8-1 成績登錄 ------------------------------------------p22

8-2 主控台資料輸入 ---------------------------------p23

8-3 查詢成績 ------------------------------------------p24

8-4 計算所得稅金額 ---------------------------------p25

8-5 設定字型1 ----------------------------------------p26

8-6 資料互換 ------------------------------------------p27

8-7 設定字型2 ----------------------------------------p28

8-8 歌唱大賽排名 ------------------------------------p29

8-9 移動人名 ------------------------------------------p30

8-10 排隊系統 ------------------------------------------p31

第九章程序與函數

9-1 計算階層 -----------------------------------------p34

9-2 等加速度運動 -----------------------------------p34

9-3 傳值呼叫 -----------------------------------------p35

9-4 圓盤張數 -----------------------------------------p36

9-5 擲骰子遊戲 --------------------------------------p37

9-6 自由落體距離計算 -----------------------------p38

第十章事件驅動程式設計

10-1 英文字母一律大寫&千分位&滑鼠移入背景變白




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p39

第十一章繪圖與多媒體

11-1繪圖---------------------------------------------------p40

11-2 亂數圓------------------------------------------------p41

11-3 任意縮放

11-4 黑白矩形+畫出指定大小&顏色的圓-----------p42

11-5 MediaPalyer控制項-------------------------------p43

第十二章視窗介面進階

12-1 功能表&記事本&小算盤-------------------------p47

12-2 長度、重量轉換+變換顏色+顯示字型大小----p49

第十三章檔案存取

13-1 讀取檔案------------------------------------------p50

13-2 讀取檔案 2---------------------------------------p53

13-3 菜單點餐管理 -----------------------------------p56

13-4 成績輸入 -----------------------------------------p57

13-5 檔案總管 -----------------------------------------p59

第十四章設計資料庫程式

14-1 書籍資料庫 ------------------------------------p60

14-2 書籍資料庫 2 ---------------------------------p61

14-3 書籍資料庫 3 ---------------------------------p62




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14-4 書籍資料庫 4 ---------------------------------p64

14-5 書籍詳細資料 --------------------------------p65

14-6 成衣資料庫 -----------------------------------p66

14-7 成衣資料庫 2 ---------------------------------p67

第十五章 EXAM

15-1 加減乘除計算機 -----------------------------p68

15-2 計算 BMI值 ----------------------------------p69

15-3 薪資計算--------------------------------------p71

15-4 計算費氏函數--------------------------------p72

15-5 輾轉相除法球最大公因數與最小公倍數 p73

15-6 骰子比大小------------------------------------p73

15-7 輸入英文字元一律小寫---------------------p74

15-8 中心十字圓------------------------------------p76

15-9 音樂播放器------------------------------------p78

15-10 檔案總管 ------------------------------------p82

15-11 便利貼 ---------------------------------------p83

15-12 求互質&畫數字三角形&數字部份加總&身分證

字號驗算 -----------------------------------------p83




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第四章

4-1 溫度轉換

程式碼：

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

Button1.Click

Dim c, f

f = Val(TextBox1.Text)

c = f * 9 / 5 + 32

Label1.Text = ("攝氏 " & f & " 度 = 華氏 " & c & "度。")

End Sub


Button2.Click

Dim c, f

f = Val(TextBox1.Text)

c = (f - 32) * 5 / 9

c = Math.Round(c, 2)

Label1.Text = ("華氏 " & f & " 度 = 攝氏 " & c & "度。")

End Sub

Private Sub Label1_Click_1(ByVal sender As System.Object, ByVal e As System.EventArgs)

Handles Label1.Click

End Sub

Private Sub 溫度轉換_Load(ByVal sender As System.Object, ByVal e As System.EventArgs)

Handles MyBase.Load

End Sub




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End Class

4-2 國旗轉換

程式碼：


Button1.Click

PictureBox1.Size = New Size(PictureBox1.Size.Width + 10, PictureBox1.Size.Height + 10)

End Sub


Button7.Click, Button11.Click

PictureBox1.Image = New Bitmap("..\..\fCanada2.gif")

End Sub


Button10.Click

PictureBox1.Image = New Bitmap("..\..\fusa2.gif")

End Sub


Button3.Click

Me.BackgroundImage = New Bitmap("..\..\fBg1.gif")

End Sub


Button2.Click

PictureBox1.Size = New Size(PictureBox1.Size.Width - 10, PictureBox1.Size.Height - 10)

End Sub


Button4.Click




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End Sub


Button5.Click


End Sub

Private Sub PictureBox1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs)

Handles PictureBox1.Click

End Sub


Button12.Click

PictureBox1.Image = New Bitmap("..\..\ffrance2.gif")

End Sub


Button9.Click

PictureBox1.Image = New Bitmap("..\..\fjapan2.gif")

End Sub

End Class

第五章

5-1 顯示時間與日期




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程式碼：


Button1.Click

Label1.Text = "按鈕時間為" & Now

End Sub

Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles

MyBase.Load

End Sub

End Class

5-4 顯示編碼

程式碼：

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

Handles Button1.Click

Dim a

a = AscW(TextBox1.Text & ChrW(0))

Label1.Text = "Unicode:" & a & " (十六進位: " & Hex(a) & ")"

End Sub


MyBase.Load

End Sub

End Class

5-5 簡易計算機




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程式碼：

Dim a As String

Private Sub TextBox1_TextChanged(ByVal sender As System.Object, ByVal e As

System.EventArgs) Handles TextBox1.TextChanged

End Sub



TextBox1.Text = TextBox1.Text & "0"

End Sub




End Sub




End Sub




End Sub




End Sub






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End Sub




End Sub




End Sub




End Sub




End Sub



TextBox1.Text = TextBox1.Text & "."

End Sub



a = "/" & Val(TextBox1.Text)

TextBox1.Text = ""

End Sub



a = "+" & Val(TextBox1.Text)

TextBox1.Text = ""

End Sub



a = "-" & Val(TextBox1.Text)

TextBox1.Text = ""

End Sub



If a.Substring(0, 1) = "+" Then TextBox1.Text = Mid(a, 2, Len(a) - 1) + Val(TextBox1.Text)




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If a.Substring(0, 1) = "-" Then TextBox1.Text = Mid(a, 2, Len(a) - 1) - Val(TextBox1.Text)

If a.Substring(0, 1) = "x" Then TextBox1.Text = Mid(a, 2, Len(a) - 1) * Val(TextBox1.Text)

If a.Substring(0, 1) = "/" Then TextBox1.Text = Mid(a, 2, Len(a) - 1) / Val(TextBox1.Text)

End Sub



a = "*" & Val(TextBox1.Text)

TextBox1.Text = ""

End Sub

End Class

第六章

6-1 計算折扣

程式碼：


Button1.Click

Dim buy As Integer, pay As Integer

Dim msg As String

buy = Val(TextBox1.Text)

If buy > 1000 Then

pay = buy * 0.8

If buy > 2000 Then

msg = "超過2000元,先打8折再減100元"

pay = pay - 100

Else

msg = "超過1000元,先打8折再減50元"

pay = pay - 50

End If




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Else

If buy > 500 Then

msg = "金額超過500元打9折"

pay = buy * 0.9

Else

msg = "金額未超過500打95折"

pay = buy * 0.95

End If

End If

TextBox2.Text = pay

Label3.Text = msg

TextBox1.Focus()

TextBox1.SelectAll()

End Sub

End Sub

End Class

6-2 猜數字遊戲

程式碼：

Dim min, max, ans, guess, count As Byte



If TextBox1.Text = "" Or Val(TextBox1.Text) > 100 Then

MsgBox("請輸入一個1到100的整數", 0 + 16, "錯誤")

Else

guess = Val(TextBox1.Text)

If guess = ans Then

vMin.Text = "請猜一個介於" & min & "到" & max & "之間的整數"

count += 1




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Label2.Text = "您目前已經猜了" & count & "次"

End If

If guess < ans Then

min = guess


count += 1


Else

max = guess


count += 1


End If

End If

TextBox1.Focus()

TextBox1.SelectAll()

End Sub

Private Sub Label2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles

Label2.Click

End Sub


MyBase.Load

min = 1

max = 100


ans = CInt(Rnd() * 100 + 1)

'MsgBox(ans)

End Sub

End Class

6-3 數字比大小




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程式碼：

Dim a, b, c As Integer



a = Val(TextBox1.Text)

b = Val(TextBox2.Text)

c = Val(TextBox3.Text)

If a > b And a > c Then

Label2.Text = "最大值是" & a & ""

Else

If b > a And b > c Then

Label2.Text = "最大值是" & b & ""

Else

If c > a and c > b Then

Label2.Text = "最大值是" & c & ""

End If

End If

End If

End Sub



End Sub

End Class

6-3 美餓美小吃店-點餐程式




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程式碼：

Dim a, b, c, d As Integer


Label7.Click

End Sub



a = Val(TextBox1.Text) * 30

b = Val(TextBox2.Text) * 70

c = Val(TextBox3.Text) * 65

d = Val(TextBox4.Text) * 99

End Sub

Private Sub RadioButton2_CheckedChanged(ByVal sender As System.Object, ByVal e As

System.EventArgs) Handles RadioButton2.CheckedChanged

End Sub

Private Sub ex2_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles

MyBase.Load

End Sub

End Class

第七章




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7-1 數字沙漏

程式碼：


MyBase.Load

Dim i As Integer

For i = 25 To 1 Step -4

Label1.Text = Label1.Text & vbCrLf & StrDup(i, CStr(i \ 4 + 1))

Next

For i = 5 To 25 Step 4

Label1.Text = Label1.Text & vbCrLf & StrDup(i, CStr(i \ 4 + 1))

Next

End Sub


Label1.Click

End Sub

End Class

7-2 蟑螂進行曲




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程式碼：


play.Click

play.Visible = False

roach.Left = 0 - roach.Size.Width

roach.Visible = True

Do

roach.Left = roach.Left + 1

If roach.Left Mod 10 = 0 Then

roach.Top = roach.Top + CInt(Int(7 * Rnd())) - 3

End If

System.Threading.Thread.Sleep(5)

Application.DoEvents()

Loop Until (roach.Left > Me.ClientSize.Width)

play.Visible = True

roach.Visible = False

End Sub

End Class




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7-3 電子時鐘

程式碼：

Private Sub Timer1_Tick(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles

Timer1.Tick

Label2.Text = Format(Now(), _

If(CheckBox1.Checked, "hh:mm:ss", "HH:mm:ss"))

Label3.Text = Format(Now(), "yyyy/MM/dd")

End Sub


MyBase.Load

Label2.Text = Format(Now(), "HH:mm:ss")

End Sub

Private Sub CheckBox2_CheckedChanged(ByVal sender As System.Object, ByVal e As

System.EventArgs) Handles CheckBox2.CheckedChanged

Timer1.Enabled = Not CheckBox2.Checked

End Sub

End Class

7-4 統計成績




第 20頁/共 85頁

程式碼：

Dim n, pass, fail, total As Integer


Button1.Click

If Val(TextBox1.Text) > 100 Or Val(TextBox1.Text) < -2 Then

MsgBox("請輸入0～100之間的分數，未輸入表示0分，輸入-1表示結束。")

TextBox1.Text = ""

Else

If Val(TextBox1.Text) = -1 Then

MsgBox("共" & n & "人，" & pass & "人及格，" & fail & "人不及格，平均" & Format(total

/ n, "#.#") & "分。", 0 + 64, "結果")

End

Else

If Val(TextBox1.Text) < 60 Then

fail += 1

Else

pass += 1

End If

total = total + Val(TextBox1.Text)

n = n + 1

TextBox1.Text = ""

Label3.Text = n + 1

TextBox1.Focus()

End If

End If

End Sub

End Class




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7-5 數字金字塔

程式碼：


MyBase.Load

For i As Integer = 1 To 10

Label1.Text = Label1.Text & vbCrLf

For j As Integer = 1 To i

Label1.Text = Label1.Text & j

Next j

Next i

End Sub


Label1.Click

End Sub

End Class

第八章

8-1 成績登錄




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程式碼：

Public Class Form1



Dim 總分 As Double

Dim 成績陣列() As String = Split(TextBox1.Text, ",")

Dim 筆數 = UBound(成績陣列) + 1

For Each s In 成績陣列

總分 = 總分 + Val(s)

Next

MsgBox("成績筆數：" & 筆數 & vbCrLf & "總成績為：" & 總分 & vbCrLf & "平均成績：" & _

Math.Round(總分 / 筆數, 2))

End Sub

End Class

8-2 主控台資料輸入




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程式碼：

Module Form3

Sub Main()

Dim 資料, 陣列(0) As String

Dim 筆數 As Integer

'不斷讓使用者輸入資料並儲存,直到輸入空白字串為止

Do

Console.Write("請數入資料:")

資料 = Console.ReadLine()

If 資料 = "" Then Exit Do

ReDim Preserve 陣列(筆數)

陣列(筆數) = 資料

筆數 = 筆數 + 1

Loop

Console.WriteLine("您一共輸入了" & 筆數 & "筆資料。")

Array.Sort(陣列)

For i = 1 To 筆數

Console.WriteLine(陣列(i - 1))

Next

Console.ReadLine()

End Sub

End Module

8-3 查詢成績




第 24頁/共 85頁

程式碼：


Button1.Click

Dim 姓名() = {"陳桶一", "黃光權", "胡生妙", "王為全", _

"李日正", "劉德菖", "方正一", "劉康寶", _

"謝掬花", "王美蘭", "徐小噹", "葉小毛"}

Dim 數學() = {90, 58, 41, 100, 59, 28, 100, 0, 100, 41, 91, 0}

Dim 國文() = {76, 77, 14, 97, 66, 11, 98, 0, 74, 46, 99, 10}

Dim 英文() = {98, 75, 33, 87, 57, 33, 100, 0, 89, 49, 84, 0}

Dim 索引 = Array.IndexOf(姓名, TextBox1.Text)

If 索引 < 0 Then

Label5.Text = "查無此人!"

Label6.Text = ""

Label7.Text = ""

Else

Label5.Text = 數學(索引)

Label6.Text = 國文(索引)

Label7.Text = 英文(索引)

End If

Dim math100$, name$, i%

i = Array.IndexOf(數學, 100)

While i > 0

name = 姓名(i)

math100 = math100 + " " + 姓名(i)

i = Array.IndexOf(數學, 100, i + 1)

End While




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MsgBox(math100, , "數學100分")

End Sub

End Class

8-4 計算所得稅金額

程式碼：

Public Class Form4



Dim 稅率(,) As Integer = _

{{410000, 6, 0}, {1090000, 13, 28700}, {2180000, 21, 115900}, {4090000, 30, 312100},

{4090001, 40, 721100}}

Dim 所得淨額 As Integer = Val(TextBox1.Text)

Dim i As Integer

For i = 0 To UBound(稅率, 1) - 1

If 所得淨額 <= 稅率(i, 0) Then

Exit For

End If

Next

Label3.Text = 所得淨額 & " * " & _

稅率(i, 1) & "%" & " - " & _

稅率(i, 2) & " - " & _

(所得淨額 * 稅率(i, 1) * 0.01 - 稅率(i, 2))

End Sub


Label1.Click

End Sub

End Class




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8-5 設定字型 1

程式碼：

Imports System.Drawing

Public Class Form5



If ListBox1.SelectedIndex = -1 Then _

ListBox1.SelectedItem = Label1.Font.Name

If ListBox2.SelectedIndex = -1 Then _

ListBox2.SelectedIndex = 0

If ListBox3.SelectedIndex = -1 Then

ListBox3.SelectedItem = "12"

End If

Dim 字型名稱 As String = ListBox1.SelectedItem

Dim 字型樣式 As FontStyle

Dim 字型大小 As Integer = Val(ListBox3.SelectedItem)

Select Case ListBox2.SelectedItem

Case "標準"

字型樣式 = FontStyle.Regular

Case "粗體"

字型樣式 = FontStyle.Bold

Case "斜體"

字型樣式 = FontStyle.Italic

Case "粗斜體"

字型樣式 = FontStyle.Bold Or FontStyle.Italic

End Select

Label1.Font = New Font(字型名稱, 字型大小, 字型樣式)




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End Sub

End Class

8-6 資料互換

程式碼：



Dim i As Integer

For i = 0 To ListBox1.SelectedItems.Count - 1

ListBox2.Items.Add(ListBox1.SelectedItems(i))

Next

For i = ListBox1.SelectedIndices.Count - 1 To 0 Step -1

ListBox1.Items.RemoveAt(ListBox1.SelectedIndices(i))

Next

End Sub



Dim i As Integer



Next



Next

End Sub

End Class




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8-7 設定字型 2

程式碼：

Imports System.Drawing



If ComboBox1.Text = "" Then ComboBox1.Text = Label1.Font.Name()

If ComboBox2.Text = "" Then ComboBox2.SelectedIndex = 0

If ComboBox3.Text = "" Then ComboBox3.Text = 12

Dim 字型名稱 As String = ComboBox1.Text

Dim 字型樣式 As FontStyle

Dim 字型大小 As Integer = Val(ComboBox3.Text)

Select Case ComboBox2.Text

Case "標準"

字型樣式 = FontStyle.Regular

Case "粗體"

字型樣式 = FontStyle.Bold

Case "斜體"

字型樣式 = FontStyle.Italic

Case "粗斜體"

字型樣式 = FontStyle.Bold Or FontStyle.Italic

End Select

Label1.Font = New Font(字型名稱, 字型大小, 字型樣式)




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End Sub

End Class

8-8 歌唱大賽排名

程式碼：

Public Class EX1

Private Sub EX1_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load

Dim name() = {"吳國民", "李得勝", "蔡可申", "陳夢嬌", "方十全"}

Dim sum(4) As Short

Dim score(,) = {{77, 78, 78, 84, 84, 79, 77, 76, 76, 81}, _

{89, 89, 92, 88, 91, 87, 86, 90, 85, 89}, _

{89, 82, 87, 83, 82, 89, 86, 86, 84, 80}, _

{86, 86, 90, 89, 81, 86, 90, 85, 87, 86}, _

{89, 88, 87, 88, 86, 84, 86, 93, 84, 87}}

Dim min, max As Short

For i = 0 To 4

min = score(i, 0)

max = score(i, 0)

sum(i) = score(i, 0)

For j = 1 To 9

If score(i, j) < min Then

min = score(i, j)

End If

If score(i, j) > max Then

max = score(i, j)

End If

sum(i) = sum(i) + score(i, j)

Next

sum(i) = sum(i) - min - max

Next

Array.Sort(sum, name)




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For i = 4 To 0 Step -1

Label1.Text = Label1.Text & name(i) & " " & sum(i) / 8 & vbCrLf

Next

End Sub

End Class

8-9 移動人名

程式碼：

Public Class EX2


Button1.Click

Dim i%

If ListBox1.SelectedIndex = 0 Then '已經移到最上面了（第0筆）

ListBox1.Items.Insert(ListBox1.Items.Count, ListBox1.Items(0)) '新增在最後一筆

ListBox1.Items.RemoveAt(0) '刪掉第一筆

ListBox1.SelectedIndex = ListBox1.Items.Count - 1

Else

i = ListBox1.SelectedIndex

If i = -1 Then

MsgBox("尚未選取資料項目！", , "注意")

Else

ListBox1.Items.Insert(i - 1, ListBox1.SelectedItem)

ListBox1.Items.RemoveAt(ListBox1.SelectedIndex())

ListBox1.SelectedIndex = i - 1

End If

End If




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Label1.Text = ListBox1.SelectedIndex

End Sub


Button2.Click

Dim i%

If ListBox1.SelectedIndex = ListBox1.Items.Count - 1 Then '已經移到最下面了（第n-1筆）

ListBox1.Items.Insert(0, ListBox1.Items(ListBox1.Items.Count - 1)) '新增在最前面

ListBox1.Items.RemoveAt(ListBox1.Items.Count - 1) '刪掉最後一筆

ListBox1.SelectedIndex = 0

Else

i = ListBox1.SelectedIndex

If i = -1 Then

MsgBox("尚未選取資料項目！", , "注意")

Else

ListBox1.Items.Insert(i + 2, ListBox1.SelectedItem)


ListBox1.SelectedIndex = i + 1

End If

End If


End Sub

Private Sub ListBox1_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles

ListBox1.Click


End Sub

End Class

8-10 排隊系統




第 32頁/共 85頁

程式碼：

Public Class EX3

Dim count%

Private Sub EX3_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles

MyBase.Load

TextBox1.Focus()

End Sub


Handles Button1.Click '加入項目，直接加在末端即可

If TextBox1.Text = "" Then

MsgBox("尚未輸入資料", 0 + 16, "錯誤")

Else

count += 1

ListBox1.Items.Add(Format(count, "00#") & "-" & TextBox1.Text)

End If

End Sub



'修改項目，亦即插入一筆在指定位置之前，再刪除該指定位置之資料

If ListBox1.SelectedIndex = -1 Then

MsgBox("尚未選取清單方塊任何一個項目", 0 + 16, "錯誤")

Else

ListBox1.Items.Insert(ListBox1.SelectedIndex(), Mid(ListBox1.SelectedItem, 1, 3) & "-" &




第 33頁/共 85頁

TextBox1.Text)


End If

End Sub



Dim i As Integer

' 逐一將 ListBox1 被選取的選項加入於 ListBox2



Next

' 逐一刪除 ListBox1 被選取的選項



Next

End Sub



Dim i As Integer

'逐一將 ListBox2 被選取的選項加入於 ListBox1



Next

'逐一刪除 ListBox2 被選取的選項



Next

End Sub



ListBox2.Items.Clear()

End Sub

End Class




第 34頁/共 85頁

第九章

9-1 計算階層

程式碼：

Sub Main()

Fact(5)

End Sub

Sub Fact(ByVal n As Integer)

Dim total As Double = 1

For i = 2 To n

total *= i

Next

Console.WriteLine(n & "!的值為" & total)

End Sub

End Module

9-2 等加速度運動




第 35頁/共 85頁

程式碼：

Sub Main()

Finalv(10, 15, 3)

Console.WriteLine("----------")

Finalv(10, 20)

Console.WriteLine("----------")

Finalv(10)

End Sub

Sub Finalv(ByVal seconds As Single, _

Optional ByVal V0 As Single = 0, _

Optional ByVal Accelaration As Single = 9.8)

Console.WriteLine("初速" & V0 & ", 加速度" & Accelaration & _

", 經" & seconds & "秒後,")

'速度計算公式 v=v0+at

Dim Velocity = V0 + Accelaration * seconds

Console.WriteLine("速度為" & Velocity)

End Sub

End Module

9-3 傳值呼叫




第 36頁/共 85頁

程式碼：

Sub DoubleArrayValue(ByVal b() As Integer)

For i = 0 To b.Length - 1

b(i) *= 2

Next

End Sub

Sub Main()

Dim a() As Integer = {1, 2, 3, 4}

DoubleArrayValue(a)

For i = 0 To a.Length - 1

Console.WriteLine(a(i))

Next

End Sub

End Module

9-4 圓盤張數




第 37頁/共 85頁

程式碼：

Module Module4

Dim number As Integer '移動次數

Sub Main()

Dim p

Dim n As Integer = 0

number = 0

Console.Write("圓盤的張數 = ")

n = Console.ReadLine()

p = Timer

aa(n, "A", "B", "C")

Console.WriteLine("花了" & Timer - p & "秒")

Console.ReadLine()

End Sub

Sub aa(ByVal n, ByVal a, ByVal b, ByVal c)

If n > 0 Then

' 把 n-1 張圓盤從 a 移到 b

aa(n - 1, a, c, b)

' 把最下面的圓盤從 a 移到 c

number += 1

Console.WriteLine("{0} : {1} --> {2}", number, a, c)

' 把 n-1 張圓盤從 b 移到 c

aa(n - 1, b, a, c)

End If

End Sub

End Module

9-5 擲骰子遊戲




第 38頁/共 85頁

程式碼：

Public Class EX1



Randomize() '這很重要，以時間來當作亂數種子，否則每次亂數產生的數列都會一樣

Label1.Text = Int(Rnd() * 6) + 1

Label2.Text = Int(Rnd() * 6) + 1

PictureBox1.Image = New Bitmap("..\..\" & Label1.Text & ".gif")

PictureBox2.Image = New Bitmap("..\..\" & Label2.Text & ".gif")

End Sub

End Class

9-5 自由落體距離計算

程式碼：

Public Class EX2

Function freefall(ByVal t) As Single

Return 1 / 2 * 9.8 * t ^ 2

End Function


Button1.Click

Label3.Text = "自由落體掉落距離" & freefall(Val(TextBox1.Text)) & "米"

End Sub

End Class




第 39頁/共 85頁

第十章

10-1 轉換大小寫

程式碼：

Private Sub TextBox1_KeyPress(ByVal sender As Object, ByVal e As

System.Windows.Forms.KeyPressEventArgs) Handles TextBox1.KeyPress

Select Case e.KeyChar

Case "a" To "z"

TextBox1.AppendText(Chr(Asc(e.KeyChar) - 32))

e.Handled = True

End Select

End Sub



End Sub


MyBase.Load

End Sub

Private Sub Form1_MouseEnter(ByVal sender As Object, ByVal e As System.EventArgs) Handles

Me.MouseEnter

Me.BackColor = Color.White




第 40頁/共 85頁

End Sub

Private Sub Form1_MouseLeave(ByVal sender As Object, ByVal e As System.EventArgs) Handles

Me.MouseLeave

Me.BackColor = SystemColors.Control

End Sub



Dim a$, c$, i%

a = TextBox2.Text

If Len(a) > 3 Then

If Len(a) Mod 3 <> 0 Then

c = Mid(a, 1, Len(a) Mod 3)

For i = Len(a) Mod 3 + 1 To Len(a) Step 3

c = c + "," + Mid(a, i, 3)

Next

End If

End If

第十一章

11-1 繪圖

程式碼：

Private Sub Form1_Paint(ByVal sender As Object, ByVal e As

System.Windows.Forms.PaintEventArgs) Handles Me.Paint

Dim g = e.Graphics

g.DrawRectangle(Pens.Yellow, 10, 10, 40, 60)




第 41頁/共 85頁

Dim bigpen = New Pen(Color.Pink, 3)

g.DrawRectangle(bigpen, 60, 10, 40, 60)

Dim biggerpen = New Pen(Color.Gold, 9)

g.DrawRectangle(biggerpen, 110, 10, 40, 60)

g.DrawLine(Pens.Black, 10, 80, 80, 160)

g.DrawLine(Pens.Red, New Point(80, 80), New Point(10, 160))

g.DrawLine(bigpen, 260, 100, 290, 125)





g.DrawEllipse(Pens.DarkBlue, 170, 10, 180, 50)

End Sub

End Class

11-2 亂數圓

程式碼：



Dim width = Me.ClientSize.Width / 10

Dim height = Me.ClientSize.Height / 10

Dim mybrushes() = {Brushes.Red, Brushes.Orange, _

Brushes.Yellow, Brushes.Blue, _

Brushes.LightPink, Brushes.LightBlue, _

Brushes.Purple, Brushes.Green}

Randomize()




第 42頁/共 85頁

For i = 0 To 9

For j = 0 To 9

Dim index = Fix(Rnd() * 8)

Dim size = Fix(Rnd() * width) + 1

Dim rect = New Rectangle(i * width + index, _

j * height + index, _

size, size)

e.Graphics.FillEllipse(mybrushes(index), rect)

Next

Next

End Sub

Private Sub Form2_SizeChanged(ByVal sender As Object, ByVal e As System.EventArgs) Handles

Me.SizeChanged

Me.Invalidate()

End Sub

End Class

11-3 任意縮放

程式碼：

Dim img As Image


MyBase.Load

Try

img = Image.FromFile("..\..\sample.jpg")

Catch ex As Exception

MsgBox(ex.Message)

End




第 43頁/共 85頁

End Try

End Sub

Private Sub Form3_MouseClick(ByVal sender As Object, ByVal e As

System.Windows.Forms.MouseEventArgs) Handles Me.MouseClick

If e.Button = Windows.Forms.MouseButtons.Left Then

img.RotateFlip(RotateFlipType.Rotate270FlipNone)

ElseIf e.Button = Windows.Forms.MouseButtons.Right Then

img.RotateFlip(RotateFlipType.Rotate90FlipNone)

End If

Me.Invalidate()

End Sub



e.Graphics.DrawImage(img, 0, 0, Me.ClientSize.Width, _

Me.ClientSize.Height)

End Sub


Me.SizeChanged

Me.Invalidate()

End Sub

End Class

第十二章

12-1 功能表&記事本&小算盤




第 44頁/共 85頁

程式碼：

Public Class Form1

Dim x As Integer

Private Sub 放大ToolStripMenuItem_Click(ByVal sender As System.Object, ByVal e As

System.EventArgs) Handles 放大ToolStripMenuItem.Click

Me.Width *= 1.2

Me.Height *= 1.2

End Sub

Private Sub 縮小ToolStripMenuItem_Click(ByVal sender As System.Object, ByVal e As

System.EventArgs) Handles 縮小ToolStripMenuItem.Click

Me.Width *= 0.8

Me.Height *= 0.8

End Sub

Private Sub 還原ToolStripMenuItem_Click(ByVal sender As System.Object, ByVal e As

System.EventArgs) Handles 還原ToolStripMenuItem.Click

Me.Width = 300

Me.Height = 300

End Sub

Private Sub ToolStripMenuItem3_Click(ByVal sender As System.Object, ByVal e As

System.EventArgs) Handles ToolStripMenuItem3.Click

x = 200

Me.Invalidate()

ToolStripMenuItem4.Checked = False


End Sub



x = 300

Me.Invalidate()



End Sub



x = 400

Me.Invalidate()



End Sub




第 45頁/共 85頁

Private Sub ToolStripMenuItem4_Paint(ByVal sender As Object, ByVal e As

System.Windows.Forms.PaintEventArgs) Handles ToolStripMenuItem4.Paint

Dim g = e.Graphics

g.Clear(BackColor)

g.FillEllipse(Brushes.Black, 10, 60, x, x)

End Sub

Private Sub REDToolStripMenuItem_Click(ByVal sender As System.Object, ByVal e As

System.EventArgs) Handles REDToolStripMenuItem.Click

Me.BackColor = Color.Red

Me.Invalidate()

End Sub

Private Sub GREENToolStripMenuItem_Click(ByVal sender As System.Object, ByVal e As

System.EventArgs) Handles GREENToolStripMenuItem.Click

Me.BackColor = Color.Green

Me.Invalidate()

End Sub

Private Sub BLUEToolStripMenuItem_Click(ByVal sender As System.Object, ByVal e As

System.EventArgs) Handles BLUEToolStripMenuItem.Click

Me.BackColor = Color.Blue

Me.Invalidate()

End Sub

Private Sub 一般ToolStripMenuItem_Click(ByVal sender As System.Object, ByVal e As

System.EventArgs) Handles 一般ToolStripMenuItem.Click

Label1.Font = New Font(Label1.Font, FontStyle.Regular)

End Sub

Private Sub 粗體ToolStripMenuItem_Click(ByVal sender As System.Object, ByVal e As

System.EventArgs) Handles 粗體ToolStripMenuItem.Click

Label1.Font = New Font(Label1.Font, FontStyle.Bold)

End Sub

Private Sub 斜體ToolStripMenuItem_Click(ByVal sender As System.Object, ByVal e As

System.EventArgs) Handles 斜體ToolStripMenuItem.Click

Label1.Font = New Font(Label1.Font, FontStyle.Italic)

End Sub

Private Sub 粗斜體ToolStripMenuItem_Click(ByVal sender As System.Object, ByVal e As

System.EventArgs) Handles 粗斜體ToolStripMenuItem.Click

Label1.Font = New Font(Label1.Font, FontStyle.Italic Or FontStyle.Bold)

End Sub



Label1.Font = New Font(Label1.Font.Name, 14, Label1.Font.Style)




第 46頁/共 85頁

End Sub




End Sub




End Sub

Private Sub 新細明體ToolStripMenuItem_Click(ByVal sender As System.Object, ByVal e As

System.EventArgs) Handles 新細明體ToolStripMenuItem.Click

Label1.Font = New Font("新細明體", Label1.Font.Size, Label1.Font.Style)

End Sub

Private Sub 標楷體ToolStripMenuItem_Click(ByVal sender As System.Object, ByVal e As

System.EventArgs) Handles 標楷體ToolStripMenuItem.Click

Label1.Font = New Font("標楷體", Label1.Font.Size, Label1.Font.Style)

End Sub

Private Sub ToolStripLabel1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs)

Handles ToolStripLabel1.Click

Shell("c:\windows\notepad.exe", AppWinStyle.NormalFocus)

End Sub

Private Sub ToolStripLabel2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs)

Handles ToolStripLabel2.Click

Shell("C:\WINDOWS\system32\calc.exe", AppWinStyle.NormalFocus)

End Sub

Private Sub ToolStripButton1_Click(ByVal sender As System.Object, ByVal e As

System.EventArgs) Handles ToolStripButton1.Click

Label1.ForeColor = Color.Orange

End Sub



Label1.ForeColor = Color.Magenta

End Sub



Label1.ForeColor = Color.DeepSkyBlue

End Sub

Private Sub ContextMenuStrip1_Opening(ByVal sender As System.Object, ByVal e As

System.ComponentModel.CancelEventArgs) Handles ContextMenuStrip1.Opening

End Sub




第 47頁/共 85頁

End Class

12-2 長度、重量轉換+變換顏色+顯示字型大小

程式碼：

Public Class ex1



Label2.ForeColor = Color.Khaki






End Sub



Label2.ForeColor = Color.GreenYellow






End Sub






第 48頁/共 85頁

Label2.ForeColor = Color.MediumTurquoise






End Sub

Private Sub 轉換成英尺ToolStripMenuItem_Click(ByVal sender As System.Object, ByVal e As

System.EventArgs) Handles 轉換成英尺ToolStripMenuItem.Click

Dim x, y As String

x = Val(TextBox1.Text)

y = x * 3.2808

TextBox2.Text = y

End Sub



44: Label2.Font = New Font(Label2.Font.Name, 14, Label2.Font.Style)






End Sub









End Sub












第 49頁/共 85頁

End Sub

Private Sub 英尺公尺ToolStripMenuItem_Click(ByVal sender As System.Object, ByVal e As

System.EventArgs) Handles 英尺公尺ToolStripMenuItem.Click

Dim x, y As String

y = Val(TextBox2.Text)

x = y * 0.3048

TextBox1.Text = x

End Sub

Private Sub 轉換成公尺ToolStripMenuItem_Click(ByVal sender As System.Object, ByVal e As

System.EventArgs) Handles 轉換成公尺ToolStripMenuItem.Click

Dim x, y As String

x = Val(TextBox3.Text)

y = x * 0.4535924

TextBox4.Text = y

End Sub

Private Sub 英鎊公斤ToolStripMenuItem_Click(ByVal sender As System.Object, ByVal e As

System.EventArgs) Handles 英鎊公斤ToolStripMenuItem.Click

Dim x, y As String

y = Val(TextBox4.Text)

x = y / 0.4535924

TextBox3.Text = x

End Sub



End Sub



End Sub

End Class

第十三章

13-1 讀取檔案




第 50頁/共 85頁

程式碼：

Public Class Form1

Dim filechanged As Boolean = False

Private Sub 開啟舊檔ToolStripMenuItem_Click(ByVal sender As System.Object, ByVal e As

System.EventArgs) Handles 開啟舊檔ToolStripMenuItem.Click

End Sub

Private Sub ListBox1_SelectedIndexChanged(ByVal sender As System.Object, ByVal e As

System.EventArgs) Handles ListBox1.SelectedIndexChanged

End Sub

End Class

13-2 讀取檔案 2




第 51頁/共 85頁

程式碼：

Public Class Form2

Dim writer As System.IO.StreamWriter

Sub Logging(ByVal Message As String)

writer.WriteLine(Now & "," & Message)

End Sub




第 52頁/共 85頁

Private Sub Form2_FormClosing(ByVal sender As Object, ByVal e As

System.Windows.Forms.FormClosingEventArgs) Handles Me.FormClosing

If Not (writer Is Nothing) Then

Logging("程式啟動")

writer.Close()

End If

End Sub


MyBase.Load

Try

writer = My.Computer.FileSystem.OpenTextFileWriter("d:\LogFile.log", True)

Logging("程式啟動")


MsgBox("無法開啟記錄檔," & ex.Message)

Me.Close()

End Try

End Sub



If OpenFileDialog1.ShowDialog() = Windows.Forms.DialogResult.OK Then

Dim LineNum As Integer = 1

Try

Dim reader =

My.Computer.FileSystem.OpenTextFileReader(OpenFileDialog1.FileName)

While reader.EndOfStream = False

Dim singleLine = reader.ReadLine()

TextBox1.Text &= LineNum.ToString("D3") & " " & singleLine & vbCrLf

LineNum += 1

End While


MsgBox(ex.Message)

End Try

End If

End Sub



If SaveFileDialog1.ShowDialog() = Windows.Forms.DialogResult.OK Then

Try

My.Computer.FileSystem.WriteAllText(SaveFileDialog1.FileName, TextBox1.Text,

False)




第 53頁/共 85頁

Logging("儲存檔案:" & SaveFileDialog1.FileName)


MsgBox(ex.Message)

End Try

End If

End Sub

End Class

13-3 菜單點餐管理

程式碼：

Public Class Form3

Dim menufilepath = "D:\ch13\menu.csv"

Dim menuitems As New ArrayList

Dim orderdetail As New ArrayList()


MyBase.Load

Try




第 54頁/共 85頁

Dim menureader = My.Computer.FileSystem _

.OpenTextFieldParser(menufilepath, ",")

While Not menureader.EndOfData

Dim onerow() = menureader.ReadFields()

menuitems.Add(onerow)

ListBox1.Items.Add(onerow(0) & "-" & _

onerow(1) & "元")

End While

menureader.Close()


MsgBox(ex.Message)

End Try

End Sub



Dim index = ListBox1.SelectedIndex

If index >= 0 Then

TextBox1.Text = menuitems(index)(0)

TextBox2.Text = menuitems(index)(1)

End If

End Sub




If index > 0 Then

menuitems(index)(0) = TextBox1.Text


ListBox1.Items(index) = menuitems(index)(0) & "-" & _

menuitems(index)(1) & "元"

End If

End Sub



If TextBox2.Text <> "" And Val(TextBox2.Text) > 0 Then

Dim newitem() = {TextBox1.Text, TextBox2.Text}

menuitems.Add(newitem)

ListBox1.Items.Add(TextBox1.Text & "-" & _

TextBox2.Text & "元")

Else




第 55頁/共 85頁

MsgBox("輸入錯誤")

End If

End Sub



menuitems.RemoveAt(ListBox1.SelectedIndex)

ListBox1.Items.RemoveAt(listbox1.SelectedIndex)

End Sub



Try

Dim menuwriter = My.Computer.FileSystem _

.OpenTextFileWriter(menufilepath, False)

For Each item In menuitems

menuwriter.writeline(item(0) & "," & item(1))

Next

menuwriter.close()

MsgBox("儲存成功")


MsgBox(ex.Message)

End Try

End Sub




If index >= 0 And Val(TextBox3.Text) > 0 Then

Dim entry() = {menuitems(index)(0), TextBox3.Text, TextBox3.Text * menuitems(index)(1)}

orderDetail.add(entry)

ListBox2.Items.Add(menuitems(index)(0) & "," & TextBox3.Text & "份, " &

Val(TextBox3.Text) * menuitems(index)(1) & "元")

Else

MsgBox("需選菜色且數量大於0")

End If

End Sub




If index >= 0 Then

ListBox2.Items.RemoveAt(index)

orderdetail.RemoveAt(index)




第 56頁/共 85頁

End If

End Sub



If ListBox2.Items.Count > 0 Then

Dim orderwriter = My.Computer.FileSystem _

.OpenTextFileWriter("D:\ch13\Order.csv", True)

Dim msg As String = "你點了:" & vbCrLf

Dim subtotal As Integer = 0

For i = 0 To orderdetail.Count - 1

orderwriter.WriteLine(Now & orderdetail(i)(0) & "," & orderdetail(i)(1) & "," &

orderdetail(i)(2))

msg &= ListBox2.Items(i) & vbCrLf

subtotal += orderdetail(i)(2)

Next

orderwriter.Close()


orderdetail.Clear()

MsgBox(msg & vbCrLf & "共" & subtotal & "元")

Else

MsgBox("你還沒點菜")

End If

End Sub

End Class

13-4 成績數入




第 57頁/共 85頁

程式碼：

Public Class ex1







ListBox1.Items.RemoveAt(ListBox1.SelectedIndex)

End Sub








End If

End Sub




If index > 0 Then





End If

End Sub


MyBase.Load

End Sub



End Sub

End Class

13-5 檔案總管




第 58頁/共 85頁

程式碼：

Public Class ex1







ListBox1.Items.RemoveAt(ListBox1.SelectedIndex)

End Sub








End If

End Sub





第 59頁/共 85頁



If index > 0 Then





End If

End Sub


MyBase.Load

End Sub



End Sub

End Class

第十四章

14-1 書籍資料庫




第 60頁/共 85頁

程式碼：

Public Class Form1

Private Sub 書籍BindingNavigatorSaveItem_Click(ByVal sender As System.Object, ByVal e As

System.EventArgs) Handles 書籍BindingNavigatorSaveItem.Click

Me.Validate()

Me.書籍BindingSource.EndEdit()

Me.TableAdapterManager.UpdateAll(Me.產品DataSet)

End Sub


MyBase.Load

'TODO: 這行程式碼會將資料載入 '產品DataSet.書籍' 資料表。您可以視需要進行移動或移除。

Me.書籍TableAdapter.Fill(Me.產品DataSet.書籍)

End Sub

End Class

14-2 書籍資料庫 2




第 61頁/共 85頁

程式碼：

Public Class Form3



Me.Validate()


Me.TableAdapterManager.UpdateAll(Me.產品DataSet1)

End Sub


MyBase.Load

'TODO: 這行程式碼會將資料載入 '產品DataSet1.書籍' 資料表。您可以視需要進行移動或移除。

Me.書籍TableAdapter.Fill(Me.產品DataSet1.書籍)

End Sub

End Class





第 62頁/共 85頁

程式碼：

Public Class Form4



DataGridView1.EndEdit()

書籍TableAdapter.Update(產品DataSet.書籍)

End Sub


MyBase.Load

'TODO: 這行程式碼會將資料載入 '產品DataSet.書籍' 資料表。您可以視需要進行移動或移除。

Me.書籍TableAdapter.Fill(Me.產品DataSet.書籍)

End Sub

End Class





第 63頁/共 85頁

程式碼：

Public Class Form5



Me.Validate()



End Sub



DataGridView.EndEdit()

Me.書籍TableAdapter.Update(產品DataSet1.書籍)

Me.書籍TableAdapter.Update(產品DataSet1.書籍)

End Sub


MyBase.Load



End Sub

Private Sub DataGridView_CellContentClick(ByVal sender As System.Object, ByVal e As




第 64頁/共 85頁

System.Windows.Forms.DataGridViewCellEventArgs) Handles DataGridView.CellContentClick

End Sub

End Class

14-5 書籍詳細資料

程式碼：

Public Class Form7



Me.Validate()



End Sub


MyBase.Load

'TODO: 這行程式碼會將資料載入 '產品DataSet1.類別' 資料表。您可以視需要進行移動或移除。

Me.類別TableAdapter.Fill(Me.產品DataSet1.類別)



End Sub




第 65頁/共 85頁

Private Sub 書號Label_Click(ByVal sender As System.Object, ByVal e As System.EventArgs)

End Sub



OpenFileDialog1.Filter = _

"圖檔|*.jpg;*.gif;*.jpeg;*.png;*.tif|所有檔案|*.*"

If OpenFileDialog1.ShowDialog() = _

System.Windows.Forms.DialogResult.OK Then

圖片PictureBox.Image = New Bitmap(OpenFileDialog1.FileName)

End If

End Sub

End Class

14-6 成衣資料庫

程式碼：

Public Class Form2

Private Sub TshirtBindingNavigatorSaveItem_Click(ByVal sender As System.Object, ByVal e As

System.EventArgs) Handles TshirtBindingNavigatorSaveItem.Click




第 66頁/共 85頁

Me.Validate()

Me.TshirtBindingSource.EndEdit()

Me.TableAdapterManager.UpdateAll(Me.成衣DataSet)

End Sub


MyBase.Load

'TODO: 這行程式碼會將資料載入 '成衣DataSet.Tshirt' 資料表。您可以視需要進行移動或移除。

Me.TshirtTableAdapter.Fill(Me.成衣DataSet.Tshirt)

End Sub

End Class

14-7 成衣資料庫 2

程式碼：

Public Class Form6

Private Sub TshirtBindingNavigatorSaveItem_Click(ByVal sender As System.Object, ByVal e As

System.EventArgs) Handles TshirtBindingNavigatorSaveItem.Click

Me.Validate()




第 67頁/共 85頁

Me.TshirtBindingSource.EndEdit()

Me.TableAdapterManager.UpdateAll(Me.成衣DataSet1)

End Sub


MyBase.Load

'TODO: 這行程式碼會將資料載入 '成衣DataSet1.Tshirt' 資料表。您可以視需要進行移動或移

除。

Me.TshirtTableAdapter.Fill(Me.成衣DataSet1.Tshirt)

End Sub

End Class

第十五章

15-1 加減乘除計算機

程式碼：

Public Class Form2



TextBox3.Text = Val(TextBox1.Text) + Val(TextBox2.Text)

Label5.Text = "＋"

End Sub



TextBox3.Text = Val(TextBox1.Text) - Val(TextBox2.Text)

Label5.Text = "-"

End Sub



TextBox3.Text = Val(TextBox1.Text) * Val(TextBox2.Text)

Label5.Text = " "╳

End Sub




第 68頁/共 85頁



TextBox3.Text = Val(TextBox1.Text) / Val(TextBox2.Text)

Label5.Text = "÷"

End Sub

End Class

15-2 計算 BMI值

程式碼：

Public Class Form3

Dim ans ‘ans是全域變數，才能在三個副程式區段都發揮作用

Private Sub Form3_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load

ans = MsgBox("您快樂嗎？", 4 + 32, "問答題") ‘MsgBox( )接收到資料傳給ans

If ans = 6 Then

Label1.Text = "請輸入體重（公斤）＝"

Label2.Text = "請輸入身高（公分）＝"

Me.Text = "計算BMI值"

Else

Label1.Text = "請輸入底＝"




第 69頁/共 85頁

Label2.Text = "請輸入高＝"

Me.Text = "計算三角形面積"

End If

End Sub

Private Sub TextBox1_TextChanged(ByVal sender As System.Object, ByVal e As System.EventArgs)

Handles TextBox1.TextChanged

If ans = 6 Then

Label3.Text = "BMI值＝ " & Math.Round(Val(TextBox1.Text) / (Val(TextBox2.Text) / 100)

^ 2, 1)

Else

Label3.Text = "三角形面積＝ " & Math.Round((Val(TextBox1.Text) * Val(TextBox2.Text) /

2), 1)

End If

End Sub

Private Sub TextBox2_TextChanged(ByVal sender As System.Object, ByVal e As System.EventArgs)

Handles TextBox2.TextChanged

If ans = 6 Then

Label3.Text = "BMI值＝ " & Math.Round(Val(TextBox1.Text) / (Val(TextBox2.Text) / 100) ^

2, 1)

Else

Label3.Text = "三角形面積＝ " & Math.Round((Val(TextBox1.Text) * Val(TextBox2.Text) / 2),

1)

End If

End Sub

End Class

15-3 薪資計算




第 70頁/共 85頁

程式碼：

Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click End End Sub Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click Dim year%, salary% TextBox1.Focus() year = Val(TextBox1.Text) If year < 0 Then MsgBox("年資須大於零", , "注意") Else If year >= 10 Then salary = 50000 Else If year >= 5 Then salary = 40000 Else salary = 30000 End If End If If RadioButton1.Checked Then salary += 10000 Else If RadioButton2.Checked Then salary += 5000 Else salary += 3000 End If End If




第 71頁/共 85頁

If CheckBox1.Checked Then salary -= 1000 End If If CheckBox2.Checked Then salary -= 600 End If If year = 0 Then salary = 0 End If TextBox2.Text = salary End Sub End Class

15-4 計算費氏函數

程式碼：

Public Class Form1_1



If Val(TextBox1.Text) < 1 Then

MsgBox("請輸入大於0的數", 0 + 16, "錯誤")

TextBox1.Text = ""

Else

TextBox2.Text = Fib(Val(TextBox1.Text))

End If

End Sub

Function Fib(ByVal K As Integer) As Decimal 'Decimal是最大的正整數數值型態了

If K <= 2 Then




第 72頁/共 85頁

Return 1 '解決遞迴問題，如何設定停止狀態很重要

Else

Return Fib(K - 1) + Fib(K - 2)

End If

End Function

End Class

15-5 輾轉相除法球最大公因數與最小公倍數

程式碼：

Public Class Form1_2


Button1.Click

Dim a, b As Integer

a = Val(TextBox1.Text)

b = Val(TextBox2.Text)

TextBox3.Text = gcd(a, b)

TextBox4.Text = a * b / gcd(a, b)

End Sub

Function gcd(ByVal a, ByVal b) As ULong '遞迴解法

If b = 0 Then

Return a

Else

Return gcd(b, a Mod b)




第 73頁/共 85頁

End If

End Function

End Class

15-6 輸入英文字元一律小寫

程式碼：

Public Class Form1

Private Sub TextBox1_KeyPress(ByVal sender As Object, ByVal e As

System.Windows.Forms.KeyPressEventArgs) Handles TextBox1.KeyPress

Select Case e.KeyChar

Case "A" To "Z"

TextBox1.AppendText(Chr((AscW(e.KeyChar) + 32)))

e.Handled = True '讓控制項不再出現大寫字母

End Select

End Sub



End Sub

End Class

15-7 中心十字圓




第 74頁/共 85頁

程式碼：

Public Class Form2



Dim k = e.Graphics

k.FillEllipse(Brushes.Black, 0, 0, Me.ClientSize.Width, Me.ClientSize.Height)

k.FillEllipse(Brushes.White, 2, 2, Me.ClientSize.Width - 4, Me.ClientSize.Height - 4)

'k.DrawEllipse(Pens.Black, f, g, h)

Dim a = New Point(ClientSize.Width / 2, 0)

Dim b = New Point(ClientSize.Width / 2, ClientSize.Height)

Dim c = New Point(0, ClientSize.Height / 2)

Dim d = New Point(ClientSize.Width, ClientSize.Height / 2)

k.DrawLine(Pens.Black, a, b)

k.DrawLine(Pens.Black, c, d)

End Sub


Me.SizeChanged

Me.Invalidate()

End Sub

End Class

15-8 音樂播放器




第 75頁/共 85頁

程式碼：

Public Class Form3



Select Case ListBox1.SelectedIndex

Case 0

AxWindowsMediaPlayer1.URL = "c:\Exam4\1.mp3"

AxWindowsMediaPlayer1.Ctlcontrols.play()

Case 1



Case 2



Case Else

MsgBox("未選取檔案！", 0 + 64, "注意")

End Select

End Sub



AxWindowsMediaPlayer1.Ctlcontrols.stop()

End Sub


Timer1.Tick

Label1.Text = AxWindowsMediaPlayer1.Ctlcontrols.currentPositionString




第 76頁/共 85頁

End Sub

End Class

15-9 螢幕保護程式

程式碼：

Public Class Form1

Dim x%, y%, xd%, yd%

Dim g As Graphics

Dim brush As SolidBrush


Timer1.Tick

Dim font As Font = New Font("標楷體", 22)

g = Me.CreateGraphics

Randomize()

Select Case Int(Rnd() * 10)

Case 0

g.Clear(Color.LightSkyBlue)

Case 1

g.Clear(Color.LightGreen)

Case 2

g.Clear(Color.Cyan)

Case 3

g.Clear(Color.Chocolate)

Case 4

g.Clear(Color.Plum)

Case 5

g.Clear(Color.Pink)

Case 6




第 77頁/共 85頁

g.Clear(Color.Aqua)

Case 7

g.Clear(Color.DarkOrange)

Case 8

g.Clear(Color.Azure)

Case 9

g.Clear(Color.Beige)

End Select

Select Case Int(Rnd() * 10)

Case 0

brush = New SolidBrush(Color.LightSalmon)

Case 1

brush = New SolidBrush(Color.Purple)

Case 2

brush = New SolidBrush(Color.Red)

Case 3

brush = New SolidBrush(Color.PeachPuff)

Case 4

brush = New SolidBrush(Color.DarkGreen)

Case 5

brush = New SolidBrush(Color.DarkBlue)

Case 6

brush = New SolidBrush(Color.Brown)

Case 7

brush = New SolidBrush(Color.Turquoise)

Case 8

brush = New SolidBrush(Color.PaleVioletRed)

Case 9

brush = New SolidBrush(Color.Teal)

End Select

g.DrawString("展現變化莫測的色彩", font, brush, x, y)

If xd = 1 Then

x -= 30

Else

x += 30

End If

If x > (Me.ClientSize.Width - 250) Then

xd = 1

End If




第 78頁/共 85頁

If x < 1 Then

xd = 0

End If

If yd = 1 Then

y -= 15

Else

y += 15

End If

If y > (Me.ClientSize.Height - 30) Then

yd = 1

End If

If y < 1 Then

yd = 0

End If

End Sub

Private Sub Form1_MouseClick(ByVal sender As Object, ByVal e As

System.Windows.Forms.MouseEventArgs) Handles Me.MouseClick

End

End Sub

End Class

15-10 檔案總管




第 79頁/共 85頁

程式碼：

Public Class Form2

Private Sub Form1_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles

Me.Load

TextBox1.Text = CurDir() '傳回當前路徑

TextBox1.SelectionStart = Len(TextBox1.Text)

TextBox1.Focus()

End Sub

Function formatDir(ByVal strDir As String)

If Microsoft.VisualBasic.Right(strDir, 1) <> "\" Then

strDir &= "\"

End If

Return strDir

End Function

Sub Display()

ChDir(TextBox1.Text) '先讀取路徑

Dim strItem$



strItem = Dir("*.*", 18) '連資料夾(16)和隱藏檔(2)都讀取

Do Until strItem = ""

If (GetAttr(strItem) And vbDirectory) = 16 Then

ListBox1.Items.Add(strItem)




第 80頁/共 85頁

Else

ListBox2.Items.Add(strItem)

End If

strItem = Dir()

Loop

End Sub



Display()

End Sub



Try

MkDir(TextBox1.Text)


MsgBox("該目錄已存在！", 0 + 48, "")

End Try

End Sub



ChDir("..")

TextBox1.Text = CurDir()

Display()

End Sub



TextBox1.Text = formatDir(TextBox1.Text)

Dim CurDir$

CurDir = TextBox1.Text & ListBox1.SelectedItem

My.Computer.FileSystem.DeleteDirectory(CurDir,

FileIO.DeleteDirectoryOption.DeleteAllContents)

Display()

End Sub







第 81頁/共 85頁

Dim CurFile$

CurFile = TextBox1.Text & ListBox2.SelectedItem

Try

My.Computer.FileSystem.DeleteFile(CurFile)


MsgBox("錯誤: 檔案已不存在或無法刪除！", 0 + 48, "")

End Try

Display()

End Sub

Private Sub ListBox1_DoubleClick(ByVal sender As Object, ByVal e As System.EventArgs)

Handles ListBox1.DoubleClick


TextBox1.Text = TextBox1.Text & ListBox1.SelectedItem

Display()

End Sub




ToolStripStatusLabel1.Text = "檔案大小：" & FileLen(TextBox1.Text & ListBox2.SelectedItem)

& " Bytes "

ToolStripStatusLabel2.Text = "修改日期：" & FileDateTime(TextBox1.Text &

ListBox2.SelectedItem)

Select Case GetAttr(TextBox1.Text & ListBox2.SelectedItem)

Case 39

Label4.Text = "檔案屬性：一般、系統、隱藏、唯讀"

Case 36

Label4.Text = "檔案屬性：一般、系統"

Case 35

Label4.Text = "檔案屬性：一般、隱藏、唯讀"

Case 34

Label4.Text = "檔案屬性：一般、隱藏"

Case 32

Label4.Text = "檔案屬性：一般"

Case 7

Label4.Text = "檔案屬性：系統、隱藏、唯讀"

Case 6

Label4.Text = "檔案屬性：系統、隱藏"

Case 5




第 82頁/共 85頁

Label4.Text = "檔案屬性：系統、唯讀"

Case 4

Label4.Text = "檔案屬性：系統"

Case 3

Label4.Text = "檔案屬性：隱藏、唯讀"

Case 2

Label4.Text = "檔案屬性：隱藏"

Case 1

Label4.Text = "檔案屬性：唯讀"

End Select

End Sub

End Class

15-11 便利貼

程式碼：

Public Class Form3

Dim filename As String = "note.txt"



FileOpen(1, filename, OpenMode.Binary)

FilePut(1, TextBox1.Text)

FileClose(1)

End Sub


MyBase.Load

Dim len%

FileOpen(1, filename, OpenMode.Binary)

len = LOF(1)

Dim content As New String("", len)

FileGet(1, content)

FileClose(1)

TextBox1.Text = content




第 83頁/共 85頁

TextBox1.SelectionStart = len

TextBox1.SelectionLength = 0

My.Computer.FileSystem.DeleteFile(filename)

End Sub

Private Sub 字型ToolStripMenuItem_Click(ByVal sender As System.Object, ByVal e As

System.EventArgs) Handles 字型ToolStripMenuItem.Click

FontDialog1.ShowColor = True

If FontDialog1.ShowDialog() = Windows.Forms.DialogResult.OK Then

TextBox1.Font = FontDialog1.Font

TextBox1.ForeColor = FontDialog1.Color

End If

End Sub

Private Sub 背景顏色ToolStripMenuItem_Click(ByVal sender As System.Object, ByVal e As

System.EventArgs) Handles 背景顏色ToolStripMenuItem.Click

ColorDialog1.AllowFullOpen = False

ColorDialog1.ShowHelp = False

If ColorDialog1.ShowDialog() = Windows.Forms.DialogResult.OK Then

TextBox1.BackColor = ColorDialog1.Color

End If

End Sub

End Class

15-12 求互質&畫數字三角形&數字部份加總&身分證

字號驗算




第 84頁/共 85頁

程式碼：

Public Class Form1

Private Sub GroupBox1_Enter(ByVal sender As System.Object, ByVal e As System.EventArgs)

Handles GroupBox1.Enter

End Sub



Dim i%, n%

Label5.Text = ""

n = Val(TextBox1.Text)

For i = 2 To n - 1

If (gcd(i, n) = 1) Then

Label5.Text &= i & " "

End If




第 85頁/共 85頁

Next

End Sub

Function gcd(ByVal a, ByVal b) As ULong '遞迴解法

If b = 0 Then

Return a

Else

Return gcd(b, a Mod b)

End If

End Function



Dim i%, j%, n%

Label6.Text = ""

n = Val(TextBox2.Text)

For i = 1 To n

For j = 1 To i

Label6.Text &= j

Next

Label6.Text &= vbCrLf

Next

End Sub

End Class




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