通过数组给您的文件排序

2018-09-06 10:52

阅读:514

  当您使用FILESYSTEMOBJECT对象获得某个目录下的文件列表的时候,你有没有发现无法控制它们的排序方式,比如按照名字排序,按照扩展名排序,按照文件大小排序等等,让我们试着用数组给它们排排序儿。

如果您想通过名字排序,那将是非常简单的,但是假如你想通过文件大小或者文件创立时间等等来排序的时候,那么将有点麻烦。我们将通过二维数组做到这一点。

下面的代码演示了如何通过选择排序方式达到的我们目的,单击排序,点两次就反着排了。
<HTML>
<HEAD>
<TITLE>文件排序演示</TITLE>
</HEAD>
<BODY>
<%
设定一个演示目录,:)
CONST DIRECTORY = /
用常数定义排序方式
CONST FILE_NAME = 0 按照名字排序……依次类推
CONST FILE_EXT = 1
CONST FILE_TYPE = 2
CONST FILE_SIZE = 3
CONST FILE_CREATED = 4
CONST FILE_MODIFIED = 5
CONST FILE_ACCESSED = 6
获得 排序命令,默认为按照名字排序
req = Request(sortBy)
If Len(req) < 1 Then sortBy = 0 Else sortBy = CInt(req)
req = Request(priorSort)
If Len(req) < 1 Then priorSort = -1 Else priorSort = CInt(req)
设置倒序
If sortBy = priorSort Then
reverse = true
priorSort = -1
Else
reverse = false
priorSort = sortBy
End If
接下来开始我们真正的代码了。。。
path = Server.MapPath(DIRECTORY)
Set fso = CreateObject(Scripting.FileSystemObject)
Set theCurrentFolder = fso.GetFolder(path)
Set curFiles = theCurrentFolder.Files
给这些文件做一个循环
Dim theFiles()
ReDim theFiles(500) 我随便定的一个大小
currentSlot = -1 start before first slot
我们将文件的所有相关信息放到数组里面
For Each fileItem in curFiles
fext = InStrRev(fname, .)
If fext < 1 Then fext = Else fext = Mid(fname,fext+1)
ftype = fileItem.Type
fsize = fileItem.Size
fcreate = fileItem.DateCreated
fmod = fileItem.DateLastModified
faccess = fileItem.DateLastAccessed
currentSlot = currentSlot + 1
If currentSlot > UBound(theFiles) Then
ReDim Preserve theFiles(currentSlot + 99)
End If
放到数组里
theFiles(currentSlot) = Array(fname,fext,ftype,fsize,fcreate,fmod,faccess)
Next
现在都在数组里了,开始下一步
fileCount = currentSlot 文件数量
ReDim Preserve theFiles(currentSlot)
排序
(8 表示 string)
If VarType(theFiles(0)(sortBy)) = 8 Then
If reverse Then kind = 1 Else kind = 2 给字符排序
Else
If reverse Then kind = 3 Else kind = 4 数字、时间。。。
End If
For i = fileCount TO 0 Step -1
minmax = theFiles(0)(sortBy)
minmaxSlot = 0
For j = 1 To i
Select Case kind
Case 1
mark = (strComp(theFiles(j)(sortBy), minmax, vbTextCompare) < 0)
Case 2
mark = (strComp(theFiles(j)(sortBy), minmax, vbTextCompare) > 0)
Case 3
mark = (theFiles(j)(sortBy) < minmax)
Case 4
mark = (theFiles(j)(sortBy) > minmax)
End Select
If mark Then
minmax = theFiles(j)(sortBy)
minmaxSlot = j
End If
Next
If minmaxSlot <> i Then
temp = theFiles(minmaxSlot)
theFiles(minmaxSlot) = theFiles(i)
theFiles(i) = temp
End If
Next
结束
%>
<FORM Name=doSort Method=Get>
<INPUT Type=Hidden Name=priorSort Value=<% = priorSort %>>
<INPUT Type=Hidden Name=sortBy Value=-1>
</FORM>
<SCRIPT Language=JavaScript>
function reSort(which)
{
document.doSort.sortBy.value = which;
document.doSort.submit();
}
</SCRIPT>
<CENTER>
<FONT Size=+2>
显示<% = (fileCount+1) %> 该目录下的文件<% = path %>
</FONT>
<P>
单击排序,再点一次反向排序
<P>
<TABLE Border=1 CellPadding=3>
<TR>
<TH><A HREF=javascript:reSort(0);>文件名</A></TH>
<TH><A HREF=javascript:reSort(1);>扩展名</A></TH>
<TH><A HREF=javascript:reSort(2);>类型</A></TH>
<TH><A HREF=javascript:reSort(3);>大小</A></TH>
<TH><A HREF=javascript:reSort(4);>建立时间</A></TH>
<TH><A HREF=javascript:reSort(5);>上次修改时间</A></TH>
<TH><A HREF=javascript:reSort(6);>上次存取时间</A></TH>
</TR>
<%
For i = 0 To fileCount
Response.Write <TR> & vbNewLine
For j = 0 To UBound(theFiles(i))
Response.Write <TD> & theFiles(i)(j) & </TD> & vbNewLine
Next
Response.Write </TR> & vbNewLine
Next
%>
</TABLE>
</BODY>
</HTML>


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