端先創建一個程序可以生成XML文件，以返回客戶端，（getfolder.ASP）
<%
@#written by Linzhang Chen ,2003-4-20
@# 轉載請注明出處和保留此版權信息
response.write "<?XML version=""1.0"" encoding=""GB2312""?>"&chr(13)
response.write "<mediafile>"&chr(13)
folders=request("folder")
if folders="/" then
folders=""
end if
dim count
count=0
folders=replace(folders,"..","")
basefolder="../media/"@#基准的文件夾路徑
newfolder=basefolder&folders
Set fso =server.CreateObject("Scripting.FileSystemObject")
set f=fso.getfolder(server.mappath(newfolder))
set sf=f.subfolders
for each fd in sf@#返回指定路徑下面的文件夾列表
response.write "<file>"&chr(13)
response.write "<ftype>folder</ftype>"&chr(13)
response.write "<fname>"&fd.name&"</fname>"&chr(13)
response.write "</file>"&chr(13)
count=count+1
next
set sf=nothing
set ff=f.Files
for each fi in ff
fname=fi.name
if instr("asf,wma,wmv",lcase(mid(fname,instrrev(fname,".")+1)))>0 then@#設定允許返回的文件類型，防止源碼洩露
response.write "<file>"&chr(13)
response.write "<ftype>file</ftype>"&chr(13)
response.write "<fname>"&fname&"</fname>"&chr(13)
response.write "</file>"&chr(13)
count=count+1
end if
next
@#如果該目錄下沒有文件，就發一個空元素
if count=0 then
response.write "<file>"&chr(13)
response.write "<ftype>empty</ftype>"&chr(13)
response.write "<fname>0</fname>"&chr(13)
response.write "</file>"&chr(13)
end if
response.write "</mediafile>"
set ff=nothing
set f=nothing
set fso=nothing
%>
下面就是客戶端的JS的功夫了(selectfile.ASP)
<!DOCTYPE HTML PUBLIC "-//W3C//DTD Html 4.0 Transitional//EN">
<Html>
<HEAD>
<TITLE> 選擇視頻文件 </TITLE>
<style>
td{font-size:9pt}
select{width:210}
.s2{width:250}
</style>
<SCRIPT LANGUAGE="Javascript">
<!--
/*written by Linzhang Chen ,2003-4-20
轉載請注明出處和保留此版權信息 */
//預裝載圖片
var imgback = new Image();
imgback.src = "images/arrow.gif";
var imgbackgray = new Image();
imgbackgray.src = "images/grayarrow.gif";
var imgfolder = new Image();
imgfolder.src = "images/folder.gif";
var imggrayfolder = new Image();
imggrayfolder.src = "images/grayfolder.gif";
//歷史記錄數組棧
var arrhistory=new Array();
var hisi=0;
//用來確定要返回文件名
function check()
{
if (document.all.filename.value=="")
{
alert("請先選擇文件");
return false;
}
else
{
window.returnValue =document.f1.folder.value+document.all.filename.value;
window.close();
}
}
//取得XML文件的內容
function getuserlist(url)
{ var oXMLDoc = new ActiveXObject(@#MSXML@#);
oXMLDoc.url = url;
var ooRoot=oXMLDoc.root;
return ooRoot;
}
//當選中一個文件時，把這個值返回給文本框
function addfile(txt)
{
document.all.filename.value=txt;
}
var first=1;//定義一個全局變量
function userlist(folders,ti)//列出所選框
{document.f1.folder.value=folders;
filebox.document.body.innerHtml="正在加載文件，請稍侯...";
var strshow="";
var timeoutid=null;
var newfolder="";
var arrfolder=new Array();
var arrff=new Array();
var blankstr="";
var oItem;
//確定歷史狀態
hisi+=ti;
arrhistory[hisi]=folders;
if (hisi==0)
{
arrow.innerHtml="<img src=\"images/grayarrow.gif\">";
}
else
{
arrow.innerHtml="<img src=\"images/arrow.gif\" border=0 style=\"cursor:hand\" onclick=\"userlist(@#"+arrhistory[hisi-1]+"@#,-1)\" onmouseover=\"this.src=@#images/arrow_over.gif@#\" onmouSEOut=\"this.src=@#images/arrow.gif@#\">";
}
//確定當前的文件夾
if (document.f1.folder.value=="")
{
folderid.innerHtml="<img src=\"images/grayfolder.gif\">"
}
else
{newsfolder=checkfolder(document.f1.folder.value)
folderid.innerHtml="<img src=\"images/folder.gif\" border=0 style=\"cursor:hand\" onclick=\"userlist(@#"+newsfolder+"@#,1)\" onmouseover=\"this.src=@#images/folder_over.gif@#\" onmouSEOut=\"this.src=@#images/folder.gif@#\">"
}
//給下拉框賦值
document.all.select.options.length=0;
newfolder=folders;
folderstr=""
var _obj=document.all.select;
var _o=document.createElement("Option");
_o.text="選擇文件夾";
_o.value="";
_obj.add(_o);
if (newfolder!="")
{arrfolder=newfolder.split("/")
for(var i=0;i<arrfolder.length-1;i++)
{blankstr+=" ";
folderstr+=arrfolder[i]+"/";
_o=document.createElement("Option");
_o.text=blankstr+arrfolder[i];
_o.value=folderstr;
_obj.add(_o);
}
}
document.all.select.options[document.all.select.options.length-1].selected=true;
url="getfolder.ASP.gl?folder="+folders;
oRoot=getuserlist(url)
strshow="<table class=file cellspacing=0 cellpadding=0>";
len=oRoot.children.length;
if (len==1)
{oItem = oRoot.children.item(0);
if(oItem.children.item(0).text=="empty")
strshow="沒有文件和文件夾了";
else
{
if(oItem.children.item(0).text=="folder")
{
strshow+="<tr><td><A href=\"Javascript:parent.userlist(@#"+folders+oItem.children.item(1).text+"/"+"@#,1)\"><img src=\"images/mediafolder.gif\" border=0 >"+oItem.children.item(1).text+"</A></td></tr>";
}
else
{
strshow+="<tr><td><a href=\"Javascript:parent.addfile(@#"+oItem.children.item(1).text+"@#)\" ><img src=\"images/mediafile.gif\" border=0>"+oItem.children.item(1).text+"</A></td></tr>";
}
}
strshow+="</table>"
}
else{
//數據入棧
for(i=0;i<len;i++)
{ oItem = oRoot.children.item(i);
if(oItem.children.item(0).text=="folder")
{
arrff[i]="<A href=\"Javascript:parent.userlist(@#"+folders+oItem.children.item(1).text+"/"+"@#,1)\"><img src=\"images/mediafolder.gif\" border=0>"+oItem.children.item(1).text+"</A>";
}
else
{
arrff[i]="<A href=\"Javascript:parent.addfile(@#"+oItem.children.item(1).text+"@#)\"><img src=\"images/mediafile.gif\" border=0 height=12>"+oItem.children.item(1).text+"</A>";
}
}
//取得要輸出的列數
if (len<=6)
{x=1;
y=6;}
else
{x=len/6;
y=6;}
for(var i=0;i<y;i++)
{strshow+="<tr>"
for(var j=0;j<x;j++)
{ponits=j*y+i;
if (ponits>=len)
{
strshow+="<td> </td>";
}
else
{
strshow+="<td>"+arrff[ponits]+"</td>";
}
}
strshow+="</tr>"
}
strshow+="</table>"
}
filebox.document.body.innerHtml=strshow;
}
//-->
</SCRIPT>
<script LANGUAGE="vbscript">
function checkfolder(folderstr)
if (folderstr="" or instr(folderstr,"/")=instrrev(folderstr,"/")) then
checkfolder=""
else
nfolder=left(folderstr,len(folderstr)-1)
checkfolder=left(nfolder,instrrev(nfolder,"/"))
end if
end function
</script>
</HEAD>
<BODY style="margin:0" bgColor=menu onload="Javascript:userlist(@#@#,0)">
<table width="443" border="0" cellspacing="0">
<tr>
<td height="36"><table width="409" border="0">
<tr>
<td width="73" align="right">查找范圍(<u>I</u>):</td>
<td width="214"><select name="select" id="select" size="1" onchange="Javascript:userlist(this.value,1);">
</select></td>
<td width="22" valign="baseline" id="arrow" align=right></td>
<td width="20" valign="middle" id="folderid"></td>
<td width="20" align="left"><img src="images/md.gif" width="16" height="15"></td>
<td width="28" align="left"><img src="images/vIEwtype.gif" width="23" height="14"></td>
</tr>
</table></td>
</tr>
<tr>
<td height="120"><table width="100%" height="100%" border="0">
<tr>
<td width="9"> </td>
<td >
<iframe src="blank.htm" width=415 height=120 id="filebox"></iframe></td>
<td width=";13"> </td>
</tr>
</table></td>
</tr>
<tr>
<td height="60"><table width="100%" border="0">
<FORM METHOD=POST ACTION="" name="f1">
<input type="hidden" name="folder" value="">
<tr>
<td width="85" align="right">文件名(<u>N</u>): </td>
<td width="254"><input type="text" id="filename" size="34"></td>
<td><button onclick="Javascript:return check()"> 打開(<u>O</U>)</button></td>
</tr>
</FORM>
<tr>
<td align="right">文件類型(<u>T</u>):</td>
<td><select name="select2" class=s2>
<option>流媒體文件(*.asf,*.wmv,*.wma)</option>
</select></td>
<td><input type="button" name="Submit" value=" 取消 " onclick="window.close();"></td>
</tr>
</table></td>
</tr>
</table>
</BODY>
</Html>
裡面還有一個小文件blank.htm用來定義文件和文件夾顯示的樣式
<!DOCTYPE HTML PUBLIC "-//W3C//DTD Html 4.0 Transitional//EN">
<Html>
<HEAD>
<TITLE> New Document </TITLE>
<style>
td{font-size:9pt}
body{font-size:9pt}
.file A{COLOR: #000000; TEXT-DECORATION: none;font-size:9pt}
.file A:visited{COLOR: #000000; TEXT-DECORATION: none;font-size:9pt}
.file A:hover {COLOR: #000000; TEXT-DECORATION: none;font-size:9pt}
</style>
</HEAD>
<BODY style="margin: 0pt">
</BODY>
</Html>
調用的時候用以下函數，就可以實現以假亂真的服務器端選擇文件的效果
function selectfile()
{
var arr = showModalDialog("selectfile.ASP?temp="+Math.random(), "", "dialogWidth:453px; dialogHeight:252px; status:0;help:1");
if (arr != null)
{
return arr
}
}
該函數最後返回的是選中的文件名,函數裡面所使用的幾張圖片大家就自已從文件選擇框上抓了：）
估計在使用過程中可能還會遇到各種未知的BUG歡迎大家和我來交流:E_mail:clzwin@sina.com