ASP在线操作数据库的通用类

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Class RLManDBCls
    Private sDBPath, RLConn, sDBType, sServerName, sUserName, sPassword
    Public Count    
    Private Sub Class_Initialize()
        sDBType = ""
    End Sub    
    Private Sub Class_Terminate()
        If IsObject(RlConn) Then
            RlConn.Close
            Set RlConn = Nothing
        End if
    End Sub    
    Public Property Let DBType(ByVal strVar)
        sDBType = strVar
    End Property
    Public Property Let ServerName(ByVal strVar)
        sServerName = strVar
    End Property
    Public Property Let UserName(ByVal strVar)
        sUserName = strVar
    End Property
    Public Property Let Password(ByVal strVar)
        sPassword = strVar
    End Property
    '设置数据库路径
    Public Property Let DBPath(ByVal strVar)
        sDBPath = strVar
        Select Case sDBType
        Case "SQL"
            StrServer = sServerName '数据库服务器名
            StrUid = sUserName '您的登录帐号
            StrSaPwd = sPassword '您的登录密码
            StrDbName = sDBPath '您的数据库名称            
            sDBPath = "driver={SQL server};server=" & StrServer & ";uid=" & StrUid & ";pwd=" & StrSaPwd & ";database=" & StrDbName
        Case "ACCESS",""
            sDBPath = "Provider = Microsoft.Jet.OLEDB.4.0;Data Source = " & Server.MapPath(sDBPath)
        End Select
        CheckData RLConn,sDbPath
    End Property
    
    '检查数据库链接，（变量名，连接字串）
    Private Sub CheckData(DataConn,ConnStr)
        On Error Resume Next
        Set DataConn = Server.CreateObject("ADODB.Connection")
        DataConn.Open ConnStr
        If Err Then
            Err.Clear
            Set DataConn = Nothing
            ErrMsg("数据库连接出错:" & Replace(ConnStr,"\","\\") & "，\n请检查连接字串，确认您输入的数据库信息是否正确。")
            Response.End
        End If
    End Sub
    '检查表是否存在    
    Function CheckTable(TableName)
        On Error Resume Next
        RLConn.Execute("select * From " & TableName)
        If Err.Number <> 0 Then
            Err.Clear()
            Call ErrMsg("错误提示：" & Err.Description)
            CheckTable = False
        Else
            CheckTable = True
        End If
    End Function
    
    '错误提示信息（消息）
    Private Sub ErrMsg(msg)
        Response.Write msg
        Response.Flush
    End Sub
'---------------------------------------字段值的操作-----------------------------------------------
    '修改字段的值
    Public Sub upColumn(ByVal TableName, ByVal ColumnName, ByVal ValueText,ByVal WhereStr)
        On Error Resume Next
        If WhereStr <> ""  Then
            If InStr(WhereStr,"Where ")<=0 Then
                WhereStr = "Where " & WhereStr
            End if
        Else
            WhereStr = ""
        End if
        RLConn.Execute("update " & TableName & " set " & ColumnName & "=" & ValueText & " " & WhereStr)
        If Err.Number <> 0 Then
            Call ErrMsg("错误提示：" & Err.Description)
            Err.Clear()
        End If
            
    End Sub
    
    '执行SQL语句
    Public Sub Execute(StrSql)
        Set RsCount=Server.CreateObject("ADODB.RecordSet")
        On Error Resume Next
        RsCount = RLConn.Execute(StrSql)
        If Left(StrSql,12) = "Select Count" Then    Count = RsCount(0)
        If Err.Number <> 0 Then
            Call ErrMsg("错误提示：" & Err.Description)
            Err.Clear()
        End If
        RsCount.Close
        Set RsCount = Nothing
    End Sub

程序代码
'---------------------------------------索引(Index),视图（View）,主键操作-----------------------------------------------
    '添加字段索引
    Public Function AddIndex(ByVal TableName, ByVal IndexName, ByVal ValueText)
        On Error Resume Next
        RLConn.Execute("Create INDEX " & IndexName & " ON [" & TableName & "]([" & ValueText & "])")
        If Err.Number <> 0 Then
            Call ErrMsg ("在 " & TableName & " 表新建" & IndexName & "索引错误，原因" &  Err.Description & "请手工修改该索引。")
            Err.Clear()
            AddIndex = False
        Else
            AddIndex = True
        End If
    End Function
    
    '删除表索引
    Public Function DelIndex(ByVal TableName, ByVal IndexName)
        On Error Resume Next
        RLConn.Execute("drop空格INDEX [" & TableName & "]." & IndexName)
        If Err.Number <> 0 Then
            Call ErrMsg ("在 " & TableName & " 表删除" & IndexName & "索引错误，原因" &  Err.Description & "请手工删除该索引。")
            Err.Clear()
            DelIndex = False
        Else
            DelIndex = True
        End If
    End Function    
    '更改表TableName的定义把字段ColumnName设为主键
    Public Function AddPRIMARYKEY(ByVal TableName, ByVal ColumnName)
        On Error Resume Next
        TableName = Replace(Replace(TableName,"[",""),"]","")
        RLConn.Execute("Alter TABLE "& TableName & " ADD CONSTRAINT PK_"&TableName&" PRIMARY KEY (" & ColumnName & ")")
        If Err.Number <> 0 Then
            Call ErrMsg ("在 " & TableName & " 将字段" & ColumnName & " 添加为主键时出错，原因 " & Err.Description & "请手工修改该字段属性。")
            Err.Clear()
            AddPRIMARYKEY = False
        Else
            AddPRIMARYKEY = True
        End If
    End Function    
    '更改表TableName的定义把字段ColumnName主键的定义删除
    Public Function DelPRIMARYKEY(ByVal TableName, ByVal ColumnName)
        On Error Resume Next
        RLConn.Execute("Alter TABLE "& TableName & " drop空格PRIMARY KEY (" & ColumnName & ")")
        If Err.Number <> 0 Then
            Call ErrMsg ("在 " & TableName & " 将字段" & ColumnName & " 主键的定义删除时出错，原因" & Err.Description & "请手工修改该字段属性。")
            Err.Clear()
            DelPRIMARYKEY = False
        Else
            DelPRIMARYKEY = True
        End If
    End Function    
    '检查主键是否存在，返回该表的主键名
    Function GetPrimaryKey(TableName)
        on error Resume Next
        Dim RsPrimary
        GetPrimaryKey = ""
        Set RsPrimary = RLConn.OpenSchema(28,Array(Empty,Empty,TableName))
        If Not RsPrimary.Eof Then GetPrimaryKey = RsPrimary("COLUMN_NAME")
        Set RsPrimary = Nothing
        If Err.Number <> 0 Then
            Call ErrMsg("数据库不支持检测数据表 " & TableName & " 的主键。原因 ：" & Err.Description)
            Err.Clear()
        End If
    End Function
'---------------------------------------表结构操作-----------------------------------------------
    '添加新字段
    Public Function AddColumn(TableName,ColumnName,ColumnType)
        On Error Resume Next
        RLConn.Execute("Alter Table [" & TableName & "] Add [" & ColumnName & "] " & ColumnType & "")
        If Err Then
            ErrMsg ("新建 " & TableName & " 表中字段错误，请手动将数据库中 <B>" &  ColumnName & "</B> 字段建立，属性为 <B>"&ColumnType& "</B>，原因" & Err.Description)
            Err.Clear
            AddColumn = False
        Else
            AddColumn = True
        End If
    End Function
    '更改字段通用函数
    Public Function ModColumn(TableName,ColumnName,ColumnType)
        On Error Resume Next
        RLConn.Execute("Alter Table [" & TableName & "] Alter Column [" & ColumnName & "] " & ColumnType & "")
        If Err Then
            Call ErrMsg ("更改 " & TableName & " 表中字段属性错误，请手动将数据库中 <B>" &  ColumnName & "</B> 字段更改为 <B>" & ColumnType &  "</B> 属性，原因" & Err.Description)
            Err.Clear
            ModColumn = False
        Else
            ModColumn = True
        End If
    End Function    
    '删除字段通用函数
    Public Function DelColumn(TableName,ColumnName)
        On Error Resume Next
        If sDBType = "SQL" THen
            RLConn.Execute("Alter Table [" & TableName & "] drop空格Column [" & ColumnName & "]")
        Else
            RLConn.Execute("Alter Table [" & TableName & "] drop空格[" & ColumnName & "]")
        End if
        If Err Then
            Call ErrMsg ("删除 " & TableName & " 表中字段错误，请手动将数据库中 <B>" &  ColumnName & "</B> 字段删除，原因" & Err.Description)
            Err.Clear
            DelColumn = False
        Else
            DelColumn = True
        End If
    End Function
'---------------------------------------表操作---------------------------------------------------
    '打开表名对象
    Private Sub ReNameTableConn()
        On Error Resume Next
        Set objADOXDatabase = Server.CreateObject("ADOX.Catalog")
        objADOXDatabase.ActiveConnection = ConnStr
        If Err Then
            ErrMsg("建立更改表名对象出错，您所要升级的空间不支持此对象，您很可能需要手动更改表名，原因" & Err.Description)
            Response.End
            Err.Clear
        End If
    End Sub
    '关闭表名对象
    Private Sub CloseReNameTableConn()
        Set objADOXDatabase = Nothing
        Conn.Close
        Set Conn=Nothing
    End Sub
    '更改数据库表名，入口参数：老表名、新表名
    Public Function RenameTable(oldName, newName)
        On Error Resume Next
        Call ReNameTableConn
        objADOXDatabase.Tables(oldName).Name = newName
        If Err Then
            Call ErrMsg ("更改表名错误，请手动将数据库中 <B>" & oldName & "</B> 表名更改为 < B>" & newName & "</B>，原因" & Err.Description)
            Err.Clear
            RenameTable = False
        Else
            RenameTable = True
        End If
        Call CloseReNameTableConn
    End Function
    '删除表通用函数
    Public Function DelTable(TableName)
        On Error Resume Next
        RLConn.Execute("drop空格Table [" & TableName & "]")
        If Err Then
            ErrMsg ("删除 " & TableName & " 表错误，请手动将数据库中 <B>" &  TableName&"</B> 表删除，原因" & Err.Description)
            Err.Clear
            DelTable = False
        Else
            DelTable = True
        End If
    End Function
    
    '建立新表
    Public Function CreateTable(ByVal TableName,ByVal FieldList)
        Dim StrSql
        If sDBType = "SQL" THen
            StrSql = "Create TABLE [" & TableName & "]( " & FieldList & ")"
        Else
            StrSql = "Create TABLE [" & TableName & "]"
        End if
        RLConn.Execute(StrSql)
        If Err.Number <> 0 Then
            Call ErrMsg("新建 " & TableName & " 表错误，原因" & Err.Description & "")
            Err.Clear()
            CreateTable = False
        Else
            CreateTable = True
        End If
    End Function





程序代码
'---------------------------------------数据库操作-----------------------------------------------
    
    '建立数据库文件
    Public function CreateDBfile(byVal dbFileName,byVal SavePath)
        On error resume Next
        SavePath = Replace(SavePath,"/","\")
        If Right(SavePath,1)<>"\" or Right(SavePath,1)<>"/" Then SavePath = Trim(SavePath) & "\"
        If Left(dbFileName,1)="\" or Left(dbFileName,1)="/" Then dbFileName = Trim(Mid(dbFileName,2,Len(dbFileName)))
        If DbExists(AppPath() & SavePath & dbFileName) Then
            ErrMsg("对不起，该数据库已经存在!" & AppPath() & SavePath & dbFileName)
            CreateDBfile = False
        Else
            Response.Write  AppPath() & SavePath & dbFileName
            Dim Ca
            Set Ca = Server.CreateObject("ADOX.Catalog")
            If Err.number<>0 Then
                ErrMsg("无法建立，请检查错误信息<br>" & Err.number & "<br>" & Err.Description)
                Err.Clear
                CreateDBfile = False
                Exit function
            End If
            call Ca.Create("Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" & AppPath() & SavePath & dbFileName)
            Set Ca = Nothing
            CreateDBfile = True
        End If
    End function
    
    '查找数据库文件是否存在
    Private function DbExists(byVal dbPath)
        On Error resume Next
        Dim c
        Set c = Server.CreateObject("ADODB.Connection")
        c.Open "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" & dbPath
        If Err.number<>0 Then
            Err.Clear
            DbExists = false
        else
            DbExists = True
        End If
        set c = nothing
    End function
    '取当前真实路径
    Private function AppPath()
        AppPath = Server.MapPath("./")
        If Right(AppPath,1) = "\" THen
            AppPath = AppPath
        ELse
            AppPath = AppPath & "\"
        End if
    End function
    
    '删除一个数据库文件
    Public function DeleteDBFile(filespec)
        filespec = AppPath() & filespec
        Dim fso
        Set fso = CreateObject("Scripting.FileSystemObject")
        If Err.number<>0 Then
            ErrMsg("删除文件发生错误!请查看错误信息：" & Err.number & " " & Err.Description & "<br>")
            Err.Clear
            DeleteDBFile = False
        End If
        If DbExists(filespec) THen
            call fso.DeleteFile(filespec)
            DeleteDBFile = True
        Else
            ErrMsg("删除文件发生错误!请查看错误信息:" & Err.number & " " & Err.Description & "<br>")
            DeleteDBFile = False
            Exit Function
        End if
        Set fso = Nothing
    End function
    
    '修改一个数据库名
    Public function RenameDBFile(filespec1,filespec2)
        filespec1 = AppPath() & filespec1:filespec2 = AppPath() & filespec2
        Dim fso
        Set fso = CreateObject("Scripting.FileSystemObject")
        If Err.number<>0 Then
            ErrMsg("修改文件名时发生错误!请查看错误信息:" & Err.number & " " & Err.Description)
            Err.Clear
            RenameDBFile = False
        End If
        If DbExists(filespec1) THen
            call fso.CopyFile(filespec1,filespec2,True)
            call fso.DeleteFile(filespec1)
            RenameDBFile = True
        Else
            ErrMsg("源文件不存在！！！")
            RenameDBFile = False
            Exit Function
        End if
        Set fso = Nothing
    End function
    '压缩数据库
    Public Function CompactDBFile(strDBFileName)
        Dim Jet_Conn_Partial
        Dim SourceConn
        Dim DestConn
        Dim oJetEngine
        Dim oFSO
        
        Jet_Conn_Partial = "Provider=Microsoft.Jet.OLEDB.4.0; Data source="
                
        SourceConn = Jet_Conn_Partial &  AppPath() &  strDBFileName
        DestConn = Jet_Conn_Partial &  AppPath() & "Temp" & strDBFileName
        Set oFSO = Server.CreateObject("Scripting.FileSystemObject")
        Set oJetEngine = Server.CreateObject("JRO.JetEngine")
        
        With oFSO
            If Not .FileExists( AppPath() & strDBFileName) Then
                ErrMsg ("数据库文件未找到！！！！" )
                Stop
                CompactDBFile = False
                Exit Function
            Else
                If .FileExists( AppPath() & "Temp" & strDBFileName) Then
                    ErrMsg("不知道的错误！！！")
                    .DeleteFile ( AppPath() & "Temp" & strDBFileName)
                    CompactDBFile = False
                    Exit Function
                End If
            End If
        End With
    
        With oJetEngine
            .CompactDatabase SourceConn, DestConn
        End With
        
        oFSO.DeleteFile  AppPath() & strDBFileName
        oFSO.MoveFile  AppPath() & "Temp" & strDBFileName,AppPath() & strDBFileName
        
        Set oFSO = Nothing
        Set oJetEngine = Nothing
        CompactDBFile = True
    End Function
End Class
Dim ManDb
Set ManDb = New RLManDBCls
'//---------连接SQL数据库--------------
'ManDb.DBType = "SQL"
'ManDb.ServerName = "TAO-KUIZU"
'ManDb.UserName = "sa"
'ManDb.Password = "123456"
'ManDb.DBPath = "hhstuss"
'ManDb.CreateTable "cexo255","id int Not Null PRIMARY KEY, Name varchar(20) Not Null"    '建立表（表名）
'ManDb.ReNameTable "cexo255","cexo2552"                                                    '表改名（旧表名，新表名）(用组件)
'ManDb.DelTable "cexo255"                                                                '删除表（表名）
'ManDb.AddColumn "cexo255", "Sex", "varchar(2) null"                        '建立表结构（表名，字段名，数据类型）
'ManDb.ModColumn "cexo255", "name", "int Not null"                            '修改表结构（表名，字段名，新数据类型）_
'ManDb.DelColumn "cexo255", "Sex"                                            '删除表结构（表名，字段名）
'ManDb.AddIndex "cexo255", "i_ID", "ID"                    '建立表索引（表名，索引名，索引字段名）
'ManDb.DelIndex "cexo255", "i_ID"                        '删除表索引（表名，索引名）
'ManDb.AddPRIMARYKEY "cexo255","name"                    '建立表主键（表名，主键字段名）
'ManDb.DelPRIMARYKEY "cexo255","name"                    '删除表主键（表名，主键字段名）_
'Response.Write  ManDb.GetPrimaryKey("cexo255")            '取表的主键（表名）
'ManDb.upColumn "cexo255","id",12345,"name = 1"                                    '修改字段的值
'ManDb.Execute "insert空格into cexo255(id,Name) values (2,2)"                        '添加记录
'ManDb.Execute "Update cexo255 Set id = 3 Where Name = 2"                        '修改记录
'ManDb.Execute "delete空格From cexo255 Where Name = 2"                                '删除记录
'ManDb.Execute("Select Count(*) From cexo255"):Response.Write ManDb.Count        '统计记录个数
'If ManDb.CheckTable("StudInfo") THen Response.Write "StudInfo表存在！！！" Else Response.Write "StudInfo表不存在！！！"
'//-----------End--------------------------
'//---------连接Access数据库--------------
ManDb.DBType = "ACCESS"
ManDb.DBPath = "test.mdb"
'ManDb.CreateDBfile "test2.mdb",""                '建立数据库（数据库名，保存路径）
'ManDb.DeleteDBFile("test2.mdb")                '删除数据库（数据库名）
'ManDb.RenameDBFile "test2.mdb","test3.mdb"        '数据库改名（旧数据库名，新数据库名）
'ManDb.CompactDBFile("test3.mdb")                '压缩数据库（数据库名）
'ManDb.CreateTable "dw",""                        '建立表（表名）
'ManDb.ReNameTable "dw","dw2"                    '表改名（旧表名，新表名）(用组件)_
'ManDb.DelTable "dw"                            '删除表（表名）
'ManDb.AddColumn "cexo255", "name", "varchar(255) Not null"                    '建立表结构（表名，字段名，数据类型）
'ManDb.ModColumn "cexo255", "name", "int Not null"                            '修改表结构（表名，字段名，新数据类型）
'ManDb.DelColumn "cexo255", "name"                                            '删除表结构（表名，字段名）
'ManDb.AddIndex "cexo255", "UserID", "ID"            '建立表索引（表名，索引名，索引字段名）
'ManDb.DelIndex "cexo255", "UserID"                    '删除表索引（表名，索引名）_
'ManDb.AddPRIMARYKEY "cexo255","id"                    '建立表主键（表名，主键字段名）
'ManDb.DelPRIMARYKEY "cexo255","id"                    '删除表主键（表名，主键字段名）_
'Response.Write  ManDb.GetPrimaryKey("cexo255")        '取表的主键（表名）
'ManDb.upColumn "cexo255","id","12345","id = '12'"                            '修改字段的值
'ManDb.Execute "insert空格into cexo255(id) values ('789')"                        '添加记录
'ManDb.Execute "Update cexo255 Set id = 'wxf' Where id = '789'"                '修改记录
'ManDb.Execute "delete空格From cexo255 Where id = 'wxf'"                        '删除记录
ManDb.Execute("Select Count(*) From cexo255"):Response.Write ManDb.Count    '统计记录个数
'If ManDb.CheckTable("StudInfo") THen Response.Write "StudInfo表存在！！！" Else Response.Write "StudInfo表不存在！！！"
'//-----------End--------------------------
Set ManDb = Nothing
%>

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