无限级目录数据库结构与方法一例

类别:Asp 点击:0 评论:0 推荐:

Folder 表:
Folderid:目录ID,自动编号
FolderParentID:上级目录ID,Int
FolderName:目录名称,Varchar
FolderDescription:目录说明,Varchar

File 表:
FileID:文档ID,自动编号
FileFolderID:所属目录ID,Int
FileName:文档名称,Varchar
FileDescription:文档内容,Varchar或备注(ntext)

function GetAllChildID(id)
    '取得FolderID为id的目录下所有子目录的FolderID,以半角逗号分开
    dim arrID
    arrID = id
    Set rsdir = Conn.Execute("Select FolderID,FolderParentID from [Folder] where FolderParentID = " & id & "")
    if rsdir.eof and rsdir.bof then
        set rsdir = nothing
        GetAllChildID = arrID
        exit function
    else
        while not rsdir.eof
            arrID = arrID & "," & GetAllChildID(rsdir("FolderID"))
        rsdir.movenext
        wend
    end if
    set rsdir = nothing
    GetAllChildID = arrID
end function


'从表File中取得某个目录下所有文档的Sql
dim AllChildID
AllChildID = GetAllChildID(5)    '取得FolderID为5下所有目录的FolderID
AllfileSql = "Select FileID,FileName from [File] where FileFolderID in ("& AllChildID &")"?

function FolderPath(id)
    '得到一个目录的完整路径
    dim Pathstr,NewPathstr
    Set rsdir = Conn.Execute("Select FolderID,FolderName,FolderParentID from [Folder] where FolderID = " & id)
    if rsdir.bof and rsdir.eof then
        Pathstr = ""
    else
        Pathstr = "<a href=""Folder.asp?FolderID=" & rsdir("FolderID") &""">" & rsdir("FolderName") & "</a> > " & Pathstr
        if rsdir("FolderParentID") <> 0 then
            Pathstr = FolderPath(rsdir("FolderParentID")) & Pathstr
        end if
    end if

    NewPathstr = Pathstr
    set rsdir = nothing
    FolderPath = NewPathstr
end function

dim folderpathstr
folderpathstr = FolderPath(67)
response.write folderpathstr '输出 (技术文档 > Web开发 > ASP > Code Sample > 表单 > )

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