首先要查看ds是否存在而且是否有表及數(shù)據(jù)如果都正常則
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應(yīng)該綁定DS里面的某個(gè)表如:ds.Tables(0);
下面作個(gè)簡單示例，與你之上的寫法不足作比較
Dim cc As ComboBox = New ComboBox
cc.Parent = Me
Dim 數(shù)據(jù)表 As New DataSet()
數(shù)據(jù)表.Tables.Add()
Dim aa As DataTable = 數(shù)據(jù)表.Tables(0)
aa.Columns.Add("lb")
aa.Rows.Add("a")
aa.Rows.Add("b")
'Dim dd As BindingSource = New BindingSource()
'dd.DataSource = 數(shù)據(jù)表.Tables(0)
'cc.DataSource = dd
cc.DataSource = 數(shù)據(jù)表.Tables(0)
cc.DisplayMember = "lb"
cc.Text = "a"
下面這段代碼，是我用來計(jì)算每個(gè)月存500元進(jìn)銀行，連續(xù)30年，最后連本帶利能有多少錢。這里面涉及復(fù)利計(jì)算。界面中右邊的文本框用來輸出每一次計(jì)算的結(jié)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(fù)利
? Dim fuli_small As Long '小復(fù)利
? Dim i As Integer '循環(huán)變量
? Dim DATAstring As String '數(shù)據(jù)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(jié)果_TextBox.Text = Str(fuli_big) + "元"
End Sub
需用VB實(shí)現(xiàn)，代碼如下
'定義蛇的運(yùn)動(dòng)速度枚舉值
Private Enum tpsSpeed
QUICKLY = 0
SLOWLY = 1
End Enum
'定義蛇的運(yùn)動(dòng)方向枚舉值
Private Enum tpsDirection
D_UP = 38
D_DOWN = 40
D_LEFT = 37
D_RIGHT = 39
End Enum
'定義運(yùn)動(dòng)區(qū)域4個(gè)禁區(qū)的枚舉值
Private Enum tpsForbiddenZone
FZ_TOP = 30
FZ_BOTTOM = 5330
FZ_LEFT = 30
FZ_RIGHT = 5730
End Enum
'定義蛇頭及身體初始化數(shù)枚舉值
Private Enum tpsSnake
SNAKEONE = 1
SNAKETWO = 2
SNAKETHREE = 3
SNAKEFOUR = 4
End Enum
'定義蛇寬度的常量
Private Const SNAKEWIDTH As Integer = 100
'該過程用于顯示游戲信息
Private Sub Form_Load()
Me.Show
Me.lblTitle = "BS貪食蛇 — (版本 " App.Major "." App.Minor "." App.Revision ")"
Me.Caption = Me.lblTitle.Caption
frmSplash.Show 1
End Sub
'該過程用于使窗體恢復(fù)原始大小
Private Sub Form_Resize()
If Me.WindowState 1 Then
Me.Caption = ""
Me.Height = 6405 '窗體高度為 6405 緹
Me.Width = 8535 '窗體寬度為 8535 緹
Me.Left = (Screen.Width - Width) \ 2
Me.Top = (Screen.Height - Height) \ 2
End If
End Sub
'該過程用于重新開始開始游戲
Private Sub cmdGameStart_MouseDown(Button As Integer, Shift As Integer, X As Single, Y As Single)
Beep
msg = MsgBox("您確認(rèn)要重新開始游戲嗎？", 4 + 32, "BS貪食蛇")
If msg = 6 Then Call m_subGameInitialize
End Sub
'該過程用于暫停/運(yùn)行游戲
Private Sub chkPause_MouseDown(Button As Integer, Shift As Integer, X As Single, Y As Single)
If Me.chkPause.Caption = "暫停游戲(P)" Then
Me.tmrSnakeMove.Enabled = False
Me.tmrGameTime.Enabled = False
Me.picMoveArea.Enabled = False
Me.lblPauseLab.Visible = True
Me.chkPause.Caption = "繼續(xù)游戲(R)"
Else
Me.tmrSnakeMove.Enabled = True
Me.tmrGameTime.Enabled = True
Me.picMoveArea.Enabled = True
Me.lblPauseLab.Visible = False
Me.chkPause.Caption = "暫停游戲(P)"
End If
End Sub
'該過程用于顯示游戲規(guī)則
Private Sub cmdGameRules_MouseDown(Button As Integer, Shift As Integer, X As Single, Y As Single)
Beep
MsgBox " BS貪食蛇：一個(gè)規(guī)則最簡單的趣味游戲，您將用鍵盤" Chr(13) _
"上的4個(gè)方向鍵來控制蛇的運(yùn)動(dòng)方向。在運(yùn)動(dòng)過程中蛇" Chr(13) _
"不能后退，蛇的頭部也不能接觸到運(yùn)動(dòng)區(qū)域的邊線以外" Chr(13) _
"和蛇自己的身體，否則就游戲失敗。在吃掉隨機(jī)出現(xiàn)的" Chr(13) _
"果子后，蛇的身體會(huì)變長，越長難度越大。祝您好運(yùn)??！", 0 + 64, "游戲規(guī)則"
End Sub
'該過程用于顯示游戲開發(fā)信息
Private Sub cmdAbout_MouseDown(Button As Integer, Shift As Integer, X As Single, Y As Single)
Beep
MsgBox "BS貪食蛇" "(V-" App.Major "." App.Minor "版本)" Chr(13) Chr(13) _
"" Chr(13) Chr(13) _
"由PigheadPrince設(shè)計(jì)制作" Chr(13) _
"CopyRight(C)2002,BestSoft.TCG", 0, "關(guān)于本游戲"
End Sub
'該過程用于退出游戲
Private Sub cmdExit_MouseDown(Button As Integer, Shift As Integer, X As Single, Y As Single)
Beep
msg = MsgBox("您要退出本游戲嗎？", 4 + 32, "BS貪食蛇")
Select Case msg
Case 6
End
Case 7
Me.chkWindowButton(2).Value = 0
Exit Sub
End Select
End Sub
'該過程用于拖動(dòng)窗體_(點(diǎn)擊圖標(biāo))
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
'該共用過程用于處理窗體控制按鈕組的相關(guān)操作_(鎖定、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 '鎖定窗體
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貪食蛇 — (V-" App.Major "." App.Minor "版本)"
Case 2 '退出
Beep
msg = MsgBox("您要退出本游戲嗎？", 4 + 32, "BS貪食蛇")
Select Case msg
Case 6
End
Case 7
Me.chkWindowButton(2).Value = 0
Exit Sub
End Select
End Select
End Sub
'該過程用于設(shè)置蛇運(yùn)動(dòng)速度的快慢
Private Sub hsbGameSpeed_Change()
Me.tmrSnakeMove.Interval = Me.hsbGameSpeed.Value
End Sub
'該過程用于通過鍵盤的方向鍵改變蛇的運(yùn)動(dòng)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
'該計(jì)時(shí)循環(huán)過程用于計(jì)算游戲耗費(fèi)的秒數(shù)并顯示
Private Sub tmrGameTime_Timer()
g_lngGameTime = g_lngGameTime + 1
Me.lblGameTime.Caption = g_lngGameTime "秒"
End Sub
'該計(jì)時(shí)循環(huán)過程用于控制蛇的行動(dòng)軌跡
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
'確認(rèn)蛇頭的運(yùn)動(dòng)方向并獲取新的位置
Select Case g_intDirection
Case D_UP '向上運(yùn)動(dòng)
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 '向下運(yùn)動(dòng)
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 '向左運(yùn)動(dòng)
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 '向右運(yùn)動(dòng)
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
'根據(jù)新的位置繪制蛇頭
lngSnakeX = g_udtSnake(SNAKEONE).Snake_CurX
lngSnakeY = g_udtSnake(SNAKEONE).Snake_CurY
lngSnakeColor = g_udtSnake(SNAKEONE).Snake_Color
Me.picMoveArea.PSet (lngSnakeX, lngSnakeY), lngSnakeColor
'移動(dòng)蛇身體其他部分的位置
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
'更新蛇舊的坐標(biāo)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
'判斷蛇在移動(dòng)中是否到了禁區(qū)而導(dǎo)致游戲失敗
If m_funMoveForbiddenZone(g_udtSnake(SNAKEONE).Snake_CurX, g_udtSnake(SNAKEONE).Snake_CurY) Then
Beep
MsgBox "您的蛇移動(dòng)到了禁區(qū)，游戲失?。?, 0 + 16, "BS貪食蛇"
Me.tmrSnakeMove.Enabled = False
Me.tmrGameTime.Enabled = False
Me.picMoveArea.Visible = False
Exit Sub
End If
'判斷蛇在移動(dòng)中是否碰到了自己的身體而導(dǎo)致游戲失敗
If m_funTouchSnakeBody(g_udtSnake(SNAKEONE).Snake_CurX, g_udtSnake(SNAKEONE).Snake_CurY) Then
Beep
MsgBox "您的蛇在移動(dòng)中碰到了自己的身體，游戲失??！", 0 + 16, "BS貪食蛇"
Me.tmrSnakeMove.Enabled = False
Me.tmrGameTime.Enabled = False
Me.picMoveArea.Visible = False
Exit Sub
End If
'判斷蛇是否吃到了果子
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顯示
g_intPlayerScore = g_intPlayerScore + 1
Me.lblYourScore.Caption = g_intPlayerScore "分"
Call m_subAddSnake '加長蛇的身體
Call m_subGetPoint '獲取下一個(gè)果子的位置和顏色
Else
'繪制果子
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
'該私有子過程用于初始化游戲
Private Sub m_subGameInitialize()
Erase g_udtSnake '清空蛇的結(jié)構(gòu)數(shù)組
g_intPlayerScore = 0 '清空玩家的得分
g_lngGameTime = 0 '清空游戲耗費(fèi)的秒數(shù)
g_intDirection = D_DOWN '設(shè)定蛇的初始運(yùn)動(dòng)方向?yàn)橄?/p>
g_intSnakeLength = 4 '設(shè)定蛇的初始長度
ReDim g_udtSnake(1 To g_intSnakeLength) '重新定義蛇的長度
'定義蛇頭部的數(shù)據(jù)
With g_udtSnake(SNAKEONE)
.Snake_OldX = 530
.Snake_OldY = 530
.Snake_Color = vbBlack
End With
'定義蛇身第2節(jié)的數(shù)據(jù)
With g_udtSnake(SNAKETWO)
.Snake_OldX = 530
.Snake_OldY = 430
.Snake_Color = vbGreen
End With
'定義蛇身第3節(jié)的數(shù)據(jù)
With g_udtSnake(SNAKETHREE)
.Snake_OldX = 530
.Snake_OldY = 330
.Snake_Color = vbYellow
End With
'定義蛇身第4節(jié)的數(shù)據(jù)
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 '獲取第一個(gè)果子的位置和顏色
End Sub
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(qǐng)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(diǎn)，以顯示所找到的內(nèi)容Search = InputBox("請(qǐng)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(shè)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(cè)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(diǎn)
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(hào)1.0" Chr(13) "由西南財(cái)經(jīng)大學(xué)天府學(xué)院" Chr(13) Space(5) "肖忠 開發(fā)" Chr(13) Space(2) "copyright:天府學(xué)院"
End Sub
Private Sub allMenu_Click()
Text1.SelStart = 0
Text1.SelLength = Len(Text1.Text)
End Sub
Private Sub backcolorMenu_Click() '設(shè)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 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.Print Text1.Text
Next
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 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
Dim url As String=" 網(wǎng)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 ' 獲取或設(shè)置一個(gè)值，該值指示是否與
Internet資源建立持久連接。
Dim reader As StreamReader = _
New StreamReader(httpResp.GetResponseStream,
System.Text.Encoding.GetEncoding(-0))
Dim respHTML As String = reader.ReadToEnd() 'respHTML就是網(wǎng)頁源代碼
Delphi代碼如下：
procedure?TForm1.Button1Click(Sender:?TObject);
var
購物總價(jià):Integer;
折扣:Extended;
begin
購物總價(jià):=StrToInt(Edit1.Text);
if?購物總價(jià)250?then
begin
折扣:=0;
end
else?if?購物總價(jià)500?then
begin
折扣:=0.05;
end
else?if?購物總價(jià)1000?then
begin
折扣:=0.075;
end
else?if?購物總價(jià)2000?then
begin
折扣:=0.1;
end
{
此段的折扣是多少？
else?if?購物總價(jià)3000?then
begin
折扣:=0.05;
end
}
else?if?購物總價(jià)=3000?then
begin
折扣:=0.15;
end;
ShowMessage('您享受的折扣是：'+FloatToStr(折扣)
+'?原價(jià)：'+IntToStr(購物總價(jià))
+'?折后總價(jià)：'+FloatToStr(購物總價(jià)*(1-折扣)));
end;
重慶分公司
重慶分公司
