ASP无限分类数据库版

ASP无限分类数据库版

数据库Access,字段：ClassID（主键）,ParentClassID,ClassName，3个字段都是文本型。

< !DOCTYPE html  PUBLIC   " -//W3C//DTD XHTML 1.0 Transitional//EN "   " http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd " >
< html xmlns = " http://www.w3.org/1999/xhtml " >
     < head >
         < title > ASP无限分类数据库版 </ title >
         < meta http - equiv = " Content-Type "  content = " text/html; charset=gb2312 "   />
         < meta name = " Generator "  content = " EditPlus " >
         < meta name = " Author "  content = " Dicky;QQ:25941 " >
         < meta name = " Keywords "  content = " Dicky;QQ:25941;ASP无限分类数据库版 " >
         < meta name = " Description "  content = " Dicky;QQ:25941;ASP无限分类数据库版 " >
     </ head >

     < body >
         < %
         Const  IsSql  =   0      ' 定义数据库类型,1为SQL Server,0为Access
         Function  OpenConn(Conn)      ' 打开数据库连接
             Dim  ConnStr 
             If  IsSql  =   1   Then   ' 如果是SQL Server数据库 
                 ' SQL Server数据库连接参数:用户名、用户密码、数据库名、连接名（本地用local，外地用IP） 
                 Dim  SqlUsername,SqlPassword,SqlDatabaseName,SqlLocalName 
                SqlUsername  =   " sa "  
                SqlPassword  =   ""  
                SqlDatabaseName  =   " TreeDb "  
                SqlLocalName  =   " (local) "  
                ConnStr  =   " Provider = Sqloledb; User ID =  "   &  SqlUsername  &   " ; Password =  "   &  SqlPassword  &   " ; Initial Catalog =  "   &  SqlDatabaseName  &   " ; Data Source =  "   &  SqlLocalName  &   " ; "  
             Else    ' 如果是Access数据库 
                 Dim  Db 
                 ' 第一次使用请修改本处数据库地址并相应修改数据库名称，如将Dicky.mdb修改为Dicky.asp(防止恶意下载Access数据库) 
                Db  =   " TreeDB.mdb "  
                ConnStr  =   " Provider = Microsoft.Jet.OLEDB.4.0;Data Source =  "   &  Server.MapPath(Db)
             End   If  
             On   Error   Resume   Next  
             Set  Conn  =  Server.CreateObject( " ADODB.Connection " ) 
            Conn.Open ConnStr 
             If  Err  Then  
         '         Err.Clear 
                 Set  Conn  =   Nothing  
                Response.Write  " 数据库连接出错，请检查连接字串。 "  
                Response.End 
             End   If  
         End Function

         Function  CloseConn(Conn)   ' 关闭数据库连接 
             If   IsObject (Conn)  Then
                Conn.Close 
                 Set  Conn  =   Nothing
             End   If
         End Function

         Function  Echo(Str)  ' 输出字符串并换行
            Response.Write Str  &  VbCrlf
         End Function

         Call  OpenConn(Conn)

         ' 定义第一级分类
         Sub  MainFl()
             Dim  Rs
             Set  Rs  =  Conn.Execute( " SELECT ClassID,ClassName FROM Class WHERE ParentClassID IS NULL " )
             If   Not  Rs.Eof  Then
                 Do   While   Not  Rs.Eof
                    Echo( " <div><label id="" "   &   Trim (Rs( " ClassID " ))  &   " "">+ "   &   Trim (Rs( " ClassName " ))  &   " </label> " )
                     Call  Subfl(Rs( " ClassID " ), " |- " )  ' 循环子级分类
                    Echo( " </div> " )
                Rs.MoveNext
                 If  Rs.Eof  Then   Exit   Do   ' 防上造成死循环
                 Loop
             End   If
             Set  Rs  =   Nothing
         End Sub
         ' 定义子级分类
         Sub  SubFl(FID,StrDis)
             Dim  Rs1
             Set  Rs1  =  Conn.Execute( " SELECT ClassID,ClassName FROM Class WHERE ParentClassID = ' "   &  FID  &   " ' " )
             If   Not  Rs1.Eof  Then
                 Do   While   Not  Rs1.Eof
                    Echo( "     <div id="" "   &   Trim (Rs1( " ClassID " ))  &   " ""> "   &  StrDis  &   Trim (Rs1( " ClassName " ))  &   " </div> " )
                     Call  SubFl( Trim (Rs1( " ClassID " )), " |  "   &  Strdis)  ' 递归子级分类
                Rs1.Movenext: Loop
                 If  Rs1.Eof  Then
                    Rs1.Close
                     Exit   Sub
                 End   If
             End   If
             Set  Rs1  =   Nothing
         End Sub

         ' 最后直接调用MainFl()就行了

        MainFl()

         Call  CloseConn(Conn)% >
     </ body >
</ html >