frmmodifyclassinfo.frm

VB类实现学生信息管理系统

   Begin VB.Label Label2 
      Caption         =   "年级："
      BeginProperty Font 
         Name            =   "宋体"
         Size            =   10.5
         Charset         =   134
         Weight          =   700
         Underline       =   0   'False
         Italic          =   0   'False
         Strikethrough   =   0   'False
      EndProperty
      Height          =   252
      Left            =   3720
      TabIndex        =   6
      Top             =   600
      Width           =   732
   End
   Begin VB.Label Label3 
      Alignment       =   2  'Center
      Caption         =   "班主任："
      BeginProperty Font 
         Name            =   "宋体"
         Size            =   10.5
         Charset         =   134
         Weight          =   700
         Underline       =   0   'False
         Italic          =   0   'False
         Strikethrough   =   0   'False
      EndProperty
      Height          =   252
      Left            =   960
      TabIndex        =   5
      Top             =   1320
      Width           =   972
   End
   Begin VB.Label Label4 
      Caption         =   "教室："
      BeginProperty Font 
         Name            =   "宋体"
         Size            =   10.5
         Charset         =   134
         Weight          =   700
         Underline       =   0   'False
         Italic          =   0   'False
         Strikethrough   =   0   'False
      EndProperty
      Height          =   252
      Left            =   3720
      TabIndex        =   4
      Top             =   1320
      Width           =   732
   End
End
Attribute VB_Name = "frmModifyclassinfo"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = False
Option Explicit
Dim tmpcolclass As colclass '现今class集合
Dim updatecolclass As colclass '要进行操作的class集合
Dim mcclean As Boolean '修改标记
Dim indicator As Integer '集合指示器

Private Sub cancelCommand_Click()
    If Not mcclean Then
        Frame2.Enabled = True
        firstCommand.Enabled = True
        previousCommand.Enabled = True
        nextCommand.Enabled = True
        lastCommand.Enabled = True
            
        txtClassno.Enabled = False
        comboGrade.Enabled = False
        txtDirector.Enabled = False
        txtClassroom.Enabled = False
        
        Call viewData
    Else
        MsgBox "什么都没有修改，有什么好取消的！", vbOKOnly + vbExclamation, "警告"
    End If
End Sub

Private Sub deleteCommand_Click()
Dim str2 As Integer
    
    str2 = MsgBox("是否删除当前记录？", vbOKCancel, "删除当前记录")
    If str2 = vbOK Then
        If indicator > 0 Then '有记录
           tmpcolclass.item(indicator).State = 12 '删除标志
           updatecolclass.add tmpcolclass.item(indicator) '添加到操作队列中
           
              If tmpcolclass.remove(indicator) Then
                 MsgBox "remove ok"
              Else
                 MsgBox "remove error"
              End If
         End If
         If tmpcolclass.count > 0 Then
         indicator = 1
         Else
         indicator = 0
         End If
         Call viewData
    End If
End Sub

Private Sub editCommand_Click()
    mcclean = False '修改标志
    
    Frame2.Enabled = False
    firstCommand.Enabled = False
    previousCommand.Enabled = False
    nextCommand.Enabled = False
    lastCommand.Enabled = False
        
    txtClassno.Enabled = False
    comboGrade.Enabled = True
    txtDirector.Enabled = False
    txtClassroom.Enabled = True
    
    comboGrade.AddItem "小学一年级"
    comboGrade.AddItem "小学二年级"
    comboGrade.AddItem "小学三年级"
    comboGrade.AddItem "小学四年级"
    comboGrade.AddItem "小学五年级"
    comboGrade.AddItem "小学六年级"
    comboGrade.AddItem "初中一年级"
    comboGrade.AddItem "初中二年级"
    comboGrade.AddItem "初中三年级"
    comboGrade.AddItem "高中一年级"
    comboGrade.AddItem "高中二年级"
    comboGrade.AddItem "高中三年级"
    
    
    
End Sub

Private Sub firstCommand_Click()
    If indicator > 1 Then
       indicator = 1
       Call viewData
    End If
End Sub

Private Sub Form_Load()
    Dim txtSQL As String
    Dim MsgText As String
    
    txtClassno.Enabled = False
    comboGrade.Enabled = False
    txtDirector.Enabled = False
    txtClassroom.Enabled = False
    
    Set tmpcolclass = New colclass
    Set updatecolclass = New colclass
    tmpcolclass.init
    If tmpcolclass.count < 1 Then
       indicator = 0
        Frame2.Enabled = False
        Frame3.Enabled = False
    Else
       indicator = 1
    End If
    
    Call viewData
    mcclean = True
End Sub

Public Sub viewData()
    If indicator > 0 Then
        txtClassno.Text = tmpcolclass.item(indicator).class_no
        comboGrade.Text = tmpcolclass.item(indicator).Grade
        txtDirector.Text = tmpcolclass.item(indicator).director
        txtClassroom.Text = tmpcolclass.item(indicator).classroom
    Else
        txtClassno.Text = ""
        comboGrade.Text = ""
        txtDirector.Text = ""
        txtClassroom.Text = ""
    End If
End Sub

Private Sub Form_Unload(Cancel As Integer)
Dim I As Integer

For I = 1 To updatecolclass.count
     
     If updatecolclass.item(I).State = 11 Then 'update
        updatecolclass.item(I).update
     End If
        
     If updatecolclass.item(I).State = 12 Then
        updatecolclass.item(I).delete
     End If
     

Next

End Sub

Private Sub lastCommand_Click()
    If indicator > 0 Then '有记录
       indicator = tmpcolclass.count
       Call viewData
    End If
End Sub

Private Sub nextCommand_Click()
    If indicator < tmpcolclass.count And indicator > 0 Then
       indicator = indicator + 1
       Call viewData
    End If
    
End Sub

Private Sub previousCommand_Click()
    If indicator > 1 Then
    indicator = indicator - 1
    Call viewData
    End If
End Sub

Private Sub updateCommand_Click()
    
    If Not Testtxt(comboGrade.Text) Then
        MsgBox "请选择年级！", vbOKOnly + vbExclamation, "警告"
        comboGrade.SetFocus
        
        Exit Sub
    End If
   
    If Not Testtxt(txtClassroom.Text) Then
        MsgBox "请输入教室号码！", vbOKOnly + vbExclamation, "警告"
        txtClassroom.SetFocus
        Exit Sub
    End If
    
    tmpcolclass.item(indicator).State = 11 '更新操作标志
    tmpcolclass.item(indicator).classroom = Trim(txtClassroom.Text)
    tmpcolclass.item(indicator).Grade = Trim(comboGrade.Text)
    
    updatecolclass.add tmpcolclass.item(indicator) '添加到操作队列中
    
    MsgBox "修改班级信息成功！", vbOKOnly + vbExclamation, "警告"
      
    Call viewData
    Frame2.Enabled = True
    firstCommand.Enabled = True
    previousCommand.Enabled = True
    nextCommand.Enabled = True
    lastCommand.Enabled = True
        
    txtClassno.Enabled = False
    comboGrade.Enabled = False
    txtDirector.Enabled = False
    txtClassroom.Enabled = False
                
    mcclean = True
    
End Sub