在线管理数据库类

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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
'---------------------------------------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 " & ColumnName & " 字段建立，属性为 "&ColumnType& "，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 " & ColumnName & " 字段更改为 " & ColumnType & " 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 " & ColumnName & " 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 " & oldName & " 表名更改为 " & newName & "，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 " & TableName&" 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

'---------------------------------------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 " & Err.number & " " & 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 & " ")
 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 & " ")
 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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