www.pudn.com > cjg2.rar > frmSelect.frm
VERSION 5.00
Begin VB.Form SelectOne
BorderStyle = 1 'Fixed Single
Caption = "单项选择题题库管理"
ClientHeight = 6270
ClientLeft = 45
ClientTop = 330
ClientWidth = 7545
LinkTopic = "Form1"
MaxButton = 0 'False
MDIChild = -1 'True
MinButton = 0 'False
ScaleHeight = 6270
ScaleWidth = 7545
Begin VB.OptionButton optC
Caption = "C"
Height = 180
Left = 2391
TabIndex = 28
Top = 3435
Width = 420
End
Begin VB.OptionButton optD
Caption = "D"
Height = 180
Left = 2850
TabIndex = 27
Top = 3435
Width = 420
End
Begin VB.TextBox txtD
Height = 270
Left = 1117
TabIndex = 26
Top = 2945
Width = 5805
End
Begin VB.TextBox txtC
Height = 270
Left = 1117
TabIndex = 25
Top = 2595
Width = 5805
End
Begin VB.TextBox txtB
Height = 270
Left = 1125
TabIndex = 24
Top = 2229
Width = 5805
End
Begin VB.TextBox txtA
Height = 270
Left = 1117
TabIndex = 23
Top = 1871
Width = 5805
End
Begin VB.OptionButton optB
Caption = "B"
Height = 180
Left = 1934
TabIndex = 2
Top = 3435
Width = 420
End
Begin VB.OptionButton optA
Caption = "A"
Height = 180
Left = 1477
TabIndex = 1
Top = 3435
Width = 420
End
Begin VB.TextBox txtPoint
Height = 270
Left = 4747
MaxLength = 1
TabIndex = 3
Text = "1"
Top = 3390
Width = 630
End
Begin VB.TextBox txtParse
Height = 1065
Left = 622
MaxLength = 200
MultiLine = -1 'True
TabIndex = 4
Top = 4065
Width = 6300
End
Begin VB.TextBox txtQuestion
Height = 1080
Left = 622
MaxLength = 100
MultiLine = -1 'True
TabIndex = 0
Top = 585
Width = 6300
End
Begin VB.CommandButton cmdSave
Caption = "保存"
Height = 300
Left = 3780
TabIndex = 7
Top = 5430
Width = 735
End
Begin VB.CommandButton cmdExit
Cancel = -1 'True
Caption = "退出"
Height = 300
Left = 4515
TabIndex = 8
Top = 5430
Width = 735
End
Begin VB.CommandButton cmdDelete
Caption = "删除"
Height = 300
Left = 3030
TabIndex = 6
Top = 5430
Width = 735
End
Begin VB.CommandButton cmdAdd
Caption = "添加"
Height = 300
Left = 2295
TabIndex = 5
Top = 5430
Width = 735
End
Begin VB.PictureBox picNavigation
AutoSize = -1 'True
BorderStyle = 0 'None
Height = 350
Left = 2700
ScaleHeight = 345
ScaleWidth = 2415
TabIndex = 13
Top = 5745
Width = 2410
Begin VB.CommandButton cmdMove
Height = 270
Index = 1
Left = 270
Picture = "frmSelect.frx":0000
Style = 1 'Graphical
TabIndex = 10
Top = 0
Width = 300
End
Begin VB.CommandButton cmdMove
Height = 270
Index = 0
Left = -15
Picture = "frmSelect.frx":0044
Style = 1 'Graphical
TabIndex = 9
Top = 0
Width = 300
End
Begin VB.CommandButton cmdMove
Height = 270
Index = 3
Left = 2010
Picture = "frmSelect.frx":0091
Style = 1 'Graphical
TabIndex = 12
Top = -15
Width = 300
End
Begin VB.CommandButton cmdMove
Height = 270
Index = 2
Left = 1725
Picture = "frmSelect.frx":00DD
Style = 1 'Graphical
TabIndex = 11
Top = -15
Width = 300
End
Begin VB.TextBox txtNews
Height = 270
Left = 555
Locked = -1 'True
TabIndex = 14
TabStop = 0 'False
Top = 0
Width = 1185
End
End
Begin VB.Label Label8
AutoSize = -1 'True
Caption = "试题解析"
Height = 180
Left = 622
TabIndex = 22
Top = 3795
Width = 720
End
Begin VB.Label Label7
AutoSize = -1 'True
Caption = "参考分数"
Height = 180
Left = 3915
TabIndex = 21
Top = 3435
Width = 720
End
Begin VB.Label Label6
AutoSize = -1 'True
Caption = "参考答案"
Height = 180
Left = 615
TabIndex = 20
Top = 3435
Width = 720
End
Begin VB.Label Label5
AutoSize = -1 'True
Caption = "选项D"
Height = 180
Left = 622
TabIndex = 19
Top = 2990
Width = 450
End
Begin VB.Label Label3
AutoSize = -1 'True
Caption = "选项B"
Height = 180
Left = 622
TabIndex = 18
Top = 2274
Width = 450
End
Begin VB.Label Label4
AutoSize = -1 'True
Caption = "选项C"
Height = 180
Left = 622
TabIndex = 17
Top = 2632
Width = 450
End
Begin VB.Label Label1
AutoSize = -1 'True
Caption = "题干内容"
Height = 180
Left = 622
TabIndex = 16
Top = 315
Width = 720
End
Begin VB.Label Label2
AutoSize = -1 'True
Caption = "选项A"
Height = 180
Left = 622
TabIndex = 15
Top = 1916
Width = 450
End
End
Attribute VB_Name = "SelectOne"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = False
Option Explicit
Dim isAdding As Boolean '定义操作状态标志
Dim objSelect As Recordset '用于保存单项选择题数据表记录
Dim objCn As Connection '用于建立数据库联接
Private Sub cmdExit_Click()
Unload Me '关闭单项选择题管理窗体
End Sub
Private Sub Form_Load()
'建立数据库联接
Set objCn = New Connection '实例化联接对象
With objCn '建立数据库联接
.Provider = "SQLOLEDB"
.ConnectionString = "User ID=sa;PWD=123;Data Source=(local);" & _
"Initial Catalog=自测考试"
.Open
End With
'获取单项选择题记录
Set objSelect = New Recordset '实例化objSelect对象
With objSelect
Set .ActiveConnection = objCn
.CursorLocation = adUseClient '指定使用客户端游标
.CursorType = adOpenStatic '指定使用静态游标
.LockType = adLockOptimistic
.Open "SELECT * FROM 选择题" '获取单项选择题数据
End With
cmdMove(0).Value = True '触发按钮单击事件，显示第一个记录
End Sub
Private Sub cmdMove_Click(Index As Integer)
With objSelect
Select Case Index '切换当前记录
Case 0 '使第一个记录成为当前记录
If .RecordCount > 0 And Not .BOF Then .MoveFirst
Case 1 '使上一个记录成为当前记录
If .RecordCount > 0 And Not .BOF Then
.MovePrevious
If .BOF Then .MoveFirst
End If
Case 2 '使下一个记录成为当前记录
If .RecordCount > 0 And Not .EOF Then
.MoveNext
If .EOF Then .MoveLast
End If
Case 3 '使最后一个记录成为当前记录
If .RecordCount > 0 And Not .EOF Then .MoveLast
End Select
Show_Data
End With
If isAdding Then isAdding = False
End Sub
Private Sub cmdAdd_Click()
txtNews = "添加新记录"
txtQuestion = ""
txtA = "": txtB = ""
txtC = "": txtD = ""
optA = True
txtPoint = "1"
txtParse = ""
isAdding = True
txtQuestion.SetFocus
End Sub
Private Sub cmdDelete_Click()
'根据是否处于添加记录状态执行不同的操作
If isAdding Then
'退出添加记录状态，显示当前记录
isAdding = False
If objSelect.RecordCount <= 0 Then
txtNews = "记录：无" '显示无记录提示
Else
Show_Data '显示当前记录数据
End If
Else
If objSelect.RecordCount > 0 Then
If MsgBox("是否删除当前记录？", vbYesNo + vbQuestion, _
"单项选择题管理") = vbYes Then
objSelect.Delete '执行删除当前记录操作
cmdMove(2).Value = True '显示下一记录数据
Else
Show_Data '显示当前记录数据
End If
End If
End If
End Sub
Private Sub cmdSave_Click()
Dim objCopy As New Recordset
'在当前表中无数据和不是添加记录时，不执行保存操作
If Not isAdding And objSelect.RecordCount < 1 Then Exit Sub
If Trim(txtQuestion) = "" Then
MsgBox "题干不能为空！", vbCritical, "单项选择题管理"
txtQuestion.SetFocus: txtQuestion = ""
ElseIf Trim(txtA) = "" Then
MsgBox "请输入选项A！", vbCritical, "单项选择题管理"
txtA.SetFocus: txtA = ""
ElseIf Trim(txtB) = "" Then
MsgBox "请输入选项B！", vbCritical, "单项选择题管理"
txtB.SetFocus: txtB = ""
ElseIf Trim(txtC) = "" Then
MsgBox "请输入选项C！", vbCritical, "单项选择题管理"
txtC.SetFocus: txtC = ""
ElseIf Trim(txtD) = "" Then
MsgBox "请输入选项D！", vbCritical, "单项选择题管理"
txtD.SetFocus: txtD = ""
ElseIf Not txtPoint Like "[1-9]" Then
MsgBox "请输入有效的分数！", vbCritical, "单项选择题管理"
txtPoint.SetFocus
txtPoint.SelStart = 0: txtPoint.SelLength = Len(txtPoint)
Else
Set objCopy = objSelect.Clone
With objCopy
If .RecordCount > 0 Then
'检查题干是否重复
.MoveFirst
.Find "题干='" & Trim(txtQuestion) & "'"
If (isAdding And Not .EOF) Or _
(Not isAdding And Not .EOF And _
.AbsolutePosition <> objSelect.AbsolutePosition) Then
MsgBox "试题重复，请修改！", vbCritical, "单项选择题管理"
txtQuestion.SetFocus
txtQuestion.SelStart = 0
txtQuestion.SelLength = Len(txtQuestion)
Exit Sub
End If
If isAdding Then objSelect.AddNew '添加新记录
Else
If isAdding Then objSelect.AddNew '添加新记录
End If
objSelect.Fields("题干") = Trim(txtQuestion)
objSelect.Fields("选项a") = Trim(txtA)
objSelect.Fields("选项b") = Trim(txtB)
objSelect.Fields("选项c") = Trim(txtC)
objSelect.Fields("选项d") = Trim(txtD)
objSelect.Fields("分数") = Trim(txtPoint)
objSelect.Fields("答案") = Switch(optA, "A", optB, "B", optC, "C", optD, "D")
If Trim(txtParse) <> "" Then objSelect.Fields("解析") = Trim(txtParse)
objSelect.Update
MsgBox "数据保存成功！", vbInformation, "单项选择题管理"
isAdding = False
'显示当前记录编号和记录总数
txtNews = "记录：" & objSelect.AbsolutePosition & "/" & objSelect.RecordCount
End With
End If
End Sub
Private Sub Form_Unload(Cancel As Integer)
objCn.Close '关闭数据联接
Set objCn = Nothing '释放数据库联接
Set objSelect = Nothing '释放记录集对象
End Sub
'限制分数输入
Private Sub txtPoint_KeyPress(KeyAscii As Integer)
If Not (Chr(KeyAscii) Like "[1-9]" Or KeyAscii = vbKeyBack) Then
KeyAscii = 0 '输入不是数字或退格键，取消输入
End If
End Sub
Private Sub Show_Data()
Dim i%
With objSelect
If .RecordCount < 1 Then
txtNews = "记录：无" '显示无记录提示
'清除显示数据
txtQuestion = "": txtPoint = "": txtParse = ""
txtA = "": txtB = "": txtC = "": txtD = ""
Else
'显示当前记录数据
txtQuestion = .Fields("题干"): txtPoint = .Fields("分数")
If IsNull(.Fields("解析")) Then
txtParse = ""
Else
txtParse = .Fields("解析")
End If
txtA = .Fields("选项a"): txtB = .Fields("选项b")
txtC = .Fields("选项c"): txtD = .Fields("选项d")
'显示参考答案
Select Case .Fields("答案")
Case "A"
optA = True
Case "B"
optB = True
Case "C"
optC = True
Case "D"
optD = True
End Select
'显示当前记录编号和记录总数
txtNews = "记录：" & .AbsolutePosition & "/" & .RecordCount
End If
End With
End Sub