frmmodifycourseinfo.frm

VB类实现学生信息管理系统

      Top             =   360
      Width           =   1212
   End
   Begin VB.Label Label2 
      Caption         =   "课程名称："
      BeginProperty Font 
         Name            =   "宋体"
         Size            =   10.5
         Charset         =   0
         Weight          =   700
         Underline       =   0   'False
         Italic          =   0   'False
         Strikethrough   =   0   'False
      EndProperty
      Height          =   252
      Left            =   3480
      TabIndex        =   6
      Top             =   360
      Width           =   1212
   End
   Begin VB.Label Label3 
      Caption         =   "课程类型："
      BeginProperty Font 
         Name            =   "宋体"
         Size            =   10.5
         Charset         =   0
         Weight          =   700
         Underline       =   0   'False
         Italic          =   0   'False
         Strikethrough   =   0   'False
      EndProperty
      Height          =   252
      Left            =   360
      TabIndex        =   5
      Top             =   1200
      Width           =   1212
   End
   Begin VB.Label Label4 
      Caption         =   "课程描述："
      BeginProperty Font 
         Name            =   "宋体"
         Size            =   10.5
         Charset         =   0
         Weight          =   700
         Underline       =   0   'False
         Italic          =   0   'False
         Strikethrough   =   0   'False
      EndProperty
      Height          =   252
      Left            =   3480
      TabIndex        =   4
      Top             =   1200
      Width           =   1212
   End
End
Attribute VB_Name = "frmModifycourseinfo"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = False
Option Explicit
Dim tmpcolcourse As colcourse '现今class集合
Dim updatecolcourse As colcourse '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
            
        txtCourseno.Enabled = False
        txtCoursename.Enabled = False
        comboCoursetype.Enabled = False
        txtCoursedes.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
           tmpcolcourse.item(indicator).State = 12 '删除标志
           updatecolcourse.add tmpcolcourse.item(indicator) '添加到操作队列中
           
              If tmpcolcourse.remove(indicator) Then
                 MsgBox "remove ok"
              Else
                 MsgBox "remove error"
              End If
         End If
         
         If tmpcolcourse.count > 0 Then
         indicator = 1
         Else
         indicator = 0
         End If
        
        Call viewData
    End If
End Sub

Private Sub editCommand_Click()
    mcclean = False
    Frame2.Enabled = False
    firstCommand.Enabled = False
    previousCommand.Enabled = False
    nextCommand.Enabled = False
    lastCommand.Enabled = False
        
    txtCourseno.Enabled = False
    txtCoursename.Enabled = True
    comboCoursetype.Enabled = True
    txtCoursedes.Enabled = True
    
    comboCoursetype.AddItem "必修"
    comboCoursetype.AddItem "考查"
    
End Sub

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

Private Sub Form_Load()
  
    
    txtCourseno.Enabled = False
    txtCoursename.Enabled = False
    comboCoursetype.Enabled = False
    txtCoursedes.Enabled = False
    
    Set tmpcolcourse = New colcourse
    Set updatecolcourse = New colcourse
    tmpcolcourse.init
    
    If tmpcolcourse.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
       txtCourseno.Text = tmpcolcourse.item(indicator).course_no
       txtCoursename.Text = tmpcolcourse.item(indicator).course_name
       comboCoursetype.Text = tmpcolcourse.item(indicator).course_type
       txtCoursedes.Text = tmpcolcourse.item(indicator).course_des
    Else
       txtCourseno.Text = ""
       txtCoursename.Text = ""
       comboCoursetype.Text = ""
       txtCoursedes.Text = ""
     
    End If
End Sub

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

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

Next
End Sub

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

Private Sub nextCommand_Click()
    If indicator < tmpcolcourse.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(txtCoursename.Text) Then
        MsgBox "请输入课程名称！", vbOKOnly + vbExclamation, "警告"
        txtCoursename.SetFocus
        Exit Sub
    End If
        
    If Not Testtxt(comboCoursetype.Text) Then
        MsgBox "请选择课程类型！", vbOKOnly + vbExclamation, "警告"
        comboCoursetype.SetFocus
        Exit Sub
    End If
    
    If Not Testtxt(txtCoursedes.Text) Then
        MsgBox "请输入课程描述信息！", vbOKOnly + vbExclamation, "警告"
        txtCoursedes.SetFocus
        Exit Sub
    End If
    
    tmpcolcourse.item(indicator).State = 11 '更新操作标志
    tmpcolcourse.item(indicator).course_name = Trim(txtCoursename.Text)
    tmpcolcourse.item(indicator).course_type = Trim(comboCoursetype.Text)
    tmpcolcourse.item(indicator).course_des = Trim(txtCoursedes.Text)
    
    updatecolcourse.add tmpcolcourse.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
        
    txtCourseno.Enabled = False
    txtCoursename.Enabled = False
    comboCoursetype.Enabled = False
    txtCoursedes.Enabled = False
                
    mcclean = True


End Sub