colcourse.cls

VB类实现学生信息管理系统

VERSION 1.0 CLASS
BEGIN
  MultiUse = -1  'True
  Persistable = 0  'NotPersistable
  DataBindingBehavior = 0  'vbNone
  DataSourceBehavior  = 0  'vbNone
  MTSTransactionMode  = 0  'NotAnMTSObject
END
Attribute VB_Name = "colcourse"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = True
Attribute VB_PredeclaredId = False
Attribute VB_Exposed = False
Option Explicit
Private mcolcourse As New Collection
    
Public Property Get count() As Long
count = mcolcourse.count
End Property

Public Sub add(tmpcourse As course)
   mcolcourse.add tmpcourse
End Sub

Public Function remove(tmp_index As Integer) As Boolean
   If mcolcourse.count >= 1 Then
      mcolcourse.remove (tmp_index)
      remove = True
   Else
      remove = False
   End If
End Function

Public Function item(ByVal index As Variant) As course
Set item = mcolcourse.item(index)
End Function

Public Sub init()
  Dim SQLstmt As String    '存放SQL语句的字符串
  Dim msg_error As String
  Dim tmp_res As ADODB.Recordset
  Dim tmp_course As course
  
  
  If db.db_state > 0 Then
  
    SQLstmt = "select * FROM course_info " '执行SQL语句"
    Set tmp_res = db.ExecuteSQL(SQLstmt, msg_error)
    
    
    
    If InStr(msg_error, "query_ok") > 0 Then 'have record
        While (tmp_res.EOF = False)
                     Set tmp_course = New course
                     tmp_course.State = 1 '有 课程存在
                     tmp_course.course_no = tmp_res.Fields("course_no")
                     tmp_course.course_name = tmp_res.Fields("course_name")
                     tmp_course.course_type = tmp_res.Fields("course_type")
                     tmp_course.course_des = tmp_res.Fields("course_des")
                     mcolcourse.add tmp_course
                     Set tmp_course = Nothing
                     tmp_res.MoveNext
                     
         Wend
    
    End If
   
 End If
 
     Set tmp_res = Nothing
    
End Sub