membertype.cls

详细介绍车辆租赁管理系统,有详细的注释,可下载学习或直接使用.

VERSION 1.0 CLASS
BEGIN
  MultiUse = -1  'True
  Persistable = 0  'NotPersistable
  DataBindingBehavior = 0  'vbNone
  DataSourceBehavior  = 0  'vbNone
  MTSTransactionMode  = 0  'NotAnMTSObject
END
Attribute VB_Name = "MemberType"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = True
Attribute VB_PredeclaredId = False
Attribute VB_Exposed = False
'1 Id 数字 长整型 分类编号
'2 TypeName  文本 长度 50  分类名称
'3 Rate  数字 单精度 享受折扣

Public Id As Long
Public TypeName As String
Public Rate As Double

Public Sub Init()
  TypeName = ""
  Rate = 1
End Sub

'删除会员类型信息
Public Sub Delete(ByVal TmpId As Long)
  SqlStmt = "DELETE FROM MemberType WHERE Id=" + Trim(TmpId)
  SQLExt (SqlStmt)
End Sub

Public Function In_DB(ByVal TmpTypeName As String) As Boolean
  Dim rs As New ADODB.Recordset
  
  SqlStmt = "SELECT * FROM MemberType WHERE TypeName='" _
          + Trim(TmpTypeName) + "'"
  Set rs = QueryExt(SqlStmt)
  If rs.EOF = True Then
    In_DB = False
  Else
    In_DB = True
  End If
End Function
Public Function GetInfo(ByVal TmpId As Long) As Boolean
  Dim rs As New ADODB.Recordset
  
  '设置SELECT语句，读取编号为TmpId的记录
  SqlStmt = "SELECT * FROM MemberType WHERE Id=" + Trim(TmpId)
  '将结果集读取到rs中
  Set rs = QueryExt(SqlStmt)

  If rs.EOF Then
    '如果结果集为空，则初始化
    Init
    GetInfo = False
  Else
    '将结果集中的数据赋值到成员变量中
    If IsNull(rs.Fields(0)) Then
      Id = 0
    Else
      Id = rs.Fields(0)
    End If
   
    If IsNull(rs.Fields(1)) Then
      TypeName = ""
    Else
      TypeName = rs.Fields(1)
    End If
    If IsNull(rs.Fields(2)) Then
      Rate = 1
    Else
      Rate = rs.Fields(2)
    End If
    GetInfo = True
  End If
End Function

'插入分类
Public Sub Insert()
  SqlStmt = "INSERT INTO MemberType(TypeName,Rate) " _
          + "VALUES('" + Trim(TypeName) + "'," + Trim(Rate) + ")"
  SQLExt (SqlStmt)
End Sub
'更新数据
Public Sub Update(ByVal TmpId As Long)
   SqlStmt = "UPDATE MemberType SET TypeName='" + Trim(TypeName) _
          + "',Rate='" + Trim(Rate) + "' Where Id = " + Trim(TmpId)
  SQLExt (SqlStmt)
End Sub