javascript单击按钮浏览文件夹并获得路径

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解决方案1:
调用windows 的shell,但会有安全问题.
* browseFolder.js
* 该文件定义了BrowseFolder()函数,它将提供一个文件夹选择对话框
* 以供用户实现对系统文件夹选择的功能
* 文件夹选择对话框起始目录由
* Shell.BrowseForFolder(WINDOW_HANDLE, Message, OPTIONS, strPath)函数
* 的strPath参数设置
* 例如:0x11--我的电脑
* 0 --桌面
* "c:"--系统C盘
*
* 用如下代码把该函数应用到一个HTML文件中:
* <script src="browseFolder.js"></script>
* 或把下面代码直接COPY到<script language="javascript">...</script>标签中;
* 特别注意的是,由于安全方面的问题,你还需要如下设置才能使本JS代码正确运行,
* 否者会出现"没有权限"的问题.
*
* 1、设置可信任站点(例如本地的可以为:http://localhost)
* 2、其次:可信任站点安全级别自定义设置中:设置下面的选项
* "对没有标记为安全的ActiveX控件进行初始化和脚本运行"----"启用"
browserFolder.js:

JScript code

/**//***path 要显示值的对象id****/function browseFolder(path) {try {var Message = "/u8bf7/u9009/u62e9/u6587/u4ef6/u5939"; //选择框提示信息var Shell = new ActiveXObject("Shell.Application");var Folder = Shell.BrowseForFolder(0, Message, 64, 17); //起始目录为:我的电脑//var Folder = Shell.BrowseForFolder(0,Message,0); //起始目录为:桌面if (Folder != null) {Folder = Folder.items(); // 返回 FolderItems 对象Folder = Folder.item(); // 返回 Folderitem 对象Folder = Folder.Path; // 返回路径if (Folder.charAt(Folder.length - 1) != "") {Folder = Folder + "";}document.getElementById(path).value = Folder;return Folder;}}catch (e) {alert(e.message);}}


使用的时候:

HTML code

<td><input type="text" name="path" /></td><td><input type="button" onclick="browseFolder('path')"value="选择生成路径" /></td>

 

 

我查了一下写成如下就不会出错了:
var   objSrc   =   new   ActiveXObject( "Shell.Application ").BrowseForFolder(0, '请选择导出路径: ',0x0040,0x11);     //0, ' '  
后面两个参数表示什么意思呢?

BrowseForFolder(Hwnd,title,Options,[RootFolder])
上网查了一下参数含义如下:
                              Options,浏览方式,见下:|-P  
                              0x0001     For   finding   a   folder   to   start   document   searchingE{vDe
                              0x0002     For   starting   the   Find   Computerrzksq^
                              0x0004     对话框加宽  
                              0x0008     确定按钮变灰失效> A3v,W
                              0x0010     在对话框顶部加入编辑框~=#g[1
                              0x0020     insist   on   valid   result   (or   CANCEL)ge01
                              0x1000     确定按钮变灰失效9 <
                              0x2000     可选当前文件,不包括子目录文件,确定按钮变灰失效,(可同时选0x0001使确定按钮有效)F
                              0x4000     浏览所有项,可选文件或文件夹
                          RootFolder,起始根目录,可选项,可以自己指定目录字符串,也可以是系统目录的数字表示,数字含义见下:G
                              0x0000                 桌面
                              0x0001                 IE浏览器hrzo
                              0x0002                 C:/WINDOWS/Start   Menu/Programs目录m
                              0x0003                 控制面板j}
                              0x0004                 打印机Ln/(
                              0x0005                 我的文档0sm
                              0x0006                 收藏U
                              0x0007                 启动*oyh
                              0x0008                 Recent文档9OB
                              0x0009                 发送到5cO
                              0x000a                 回收站,/a
                              0x000b                 开始菜单ZKS
                              0x000c                 桌面(打开在我的电脑)                
                              0x0010                 C:/WINDOWS/Desktop桌面目录K+*fg
                              0x0011                 我的电脑(包括所有驱动器)N`T
                              0x0012                 整个网络Y5Swh
                              0x0013                 NetHood%O~64
                              0x0014                 字体目录(ObtHd
                              0x0015                 C:/WINDOWS/ShellNew目录Byo!)v
                              0x001a                 C:/WINDOWS/Application   Data目录q
                              0x001b     printHoodS]pW2
                              0x0020                 C:/WINDOWS/Temporary   Internet   Files目录
                              0x0021                 cookie目录
                              0x0022                 IE浏览历史

2.解决方案二:
自己写一个js读取本地硬盘的选择框, 缺点是外观上较上一个差一些.

 

HTML code
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
<title>无标题文档</title>
</head>
<body>
<table border="0" cellpadding="0" width="100%" id="tb_show">
<tr>
<td width="18%">文件保存位置:</td>
<td width="82%">
<%--<html:file property="file" size="40" styleClass="inputbox"/>--%>
<input name="backDir" type="text" value ="C:" size="100" width="500">
</td>
</tr>

<tr>
<td>目录位置:</td>
<td>
<select name="tables_drive" id="tables_drives" onchange="get_drives()" ></select>
</td>
</tr>

<tr>
<td colspan="2">
<select name="table_folder" id="table_folder" size="10" multiple ondblclick="get_file()"></select>
</td>
</tr>

<tr>
<td colspan="2">
<font color="red">说明:双击列表框的一个选项,就将该文件夹下面的文件夹显示在该列表框中。第一个就是根目录</font>
</td>
</tr>
</table>
</body>
</html>
<script>
/**//*
*初始化,将系统所有的驱动器放入table_drives列表
*/
window.onload = new function init()
{
var fso, s, n, e, x;
fso = new ActiveXObject("Scripting.FileSystemObject");
e = new Enumerator(fso.Drives);
s = "";
for (; !e.atEnd(); e.moveNext())
{
x = e.item();
s = s + x.DriveLetter;
s += ":";
if (x.DriveType == 3)
n = x.ShareName;
else if (x.IsReady)
n = x.VolumeName;
else
n = "[驱动器未就绪]";
s += n + ",";
}
var drives = s.split(",");
var tableDrives = document.getElementById("tables_drives");
for ( var i = 0; i < drives.length-1; i++ )
{
var option = document.createElement("OPTION");
drives[i].split(":");
option.value = "["+drives[i].split(":")[0]+":]"+drives[i].split(":")[1];
option.text = "["+drives[i].split(":")[0]+":]"+drives[i].split(":")[1];
tableDrives.add(option);
}
}

/**//*
*tables_drives列表中选中的驱动器上所有文件夹放入table_folder列表中
*/
function get_drives()
{
var tableDrives = document.getElementById("tables_drives");
var tableFolders = document.getElementById("table_folder");
for ( var i = 0; i < tableDrives.options.length; i++ )
{
if ( tableDrives.options[i].selected == true )
{
var fso, f, fc, s;
var drive = tableDrives.options[i].value.split(":")[0].substring(1,tableDrives.options[i].value.split(":")[0].length);
document.getElementById("backDir").value = drive + ":";
fso = new ActiveXObject("Scripting.FileSystemObject");
if (fso.DriveExists(drive))
{
d = fso.GetDrive(drive);
if ( d.IsReady )
{
f = fso.GetFolder(d.RootFolder);
fc = new Enumerator(f.SubFolders);
s = "";
for (; !fc.atEnd(); fc.moveNext())
{
s += fc.item();
s += ",";
}

var len = tableFolders.options.length;
while(len >= 0)
{
tableFolders.options.remove(len);
len--;
}
var option = document.createElement("OPTION");
option.value = drive + ":";
option.text = drive + ":";
tableFolders.add(option);
var folders = s.split(",");
for ( j = 0; j < folders.length -1; j++)
{
option = document.createElement("OPTION");
option.value = folders[j];
option.text = folders[j];
tableFolders.add(option);
}
}
else
{
alert("无法改变当前内容!")
}
}
else
return false;
}
}
}

/**//*
*table_folder双击选项中的一个选项,就将该文件夹下面的文件夹显示在table_folder列表中。
*/
function get_file()
{
var tableFolders = document.getElementById("table_folder");
var tableDrives = document.getElementById("tables_drives");
for ( var i = 0; i < tableFolders.options.length; i++ )
{
if ( tableFolders.options[i].selected == true )
{
var fso, f, fc, s;
var folderpath = tableFolders.options[i].value.substring(0,tableFolders.options[i].value.length);
if ( folderpath.charAt(folderpath.length-1) == "" )
{
document.getElementById("backDir").value = folderpath;
}
else
{
document.getElementById("backDir").value = folderpath + "";
}


fso = new ActiveXObject("Scripting.FileSystemObject");
f = fso.GetFolder(folderpath);
fc = new Enumerator(f.SubFolders);
s = "";
for (; !fc.atEnd(); fc.moveNext())
{
s += fc.item();
s += ",";
}
var len = tableFolders.options.length;
while(len >= 0)
{
tableFolders.options.remove(len);
len--;
}
var opt = "";
var opt1 = "";
for ( j = 0; j < folderpath.split("").length; j++ )
{
var option = document.createElement("OPTION");
opt = opt + folderpath.split("")[j]+"";
if ( j > 0)
{
opt1 = opt;
option.value = opt1.substring(0,opt1.length-1);
option.text = opt1.substring(0,opt1.length-1);
tableFolders.add(option);
}
else
{
option.value = opt;
option.text = opt;
tableFolders.add(option);
}

}
if ( tableFolders.options[0].value == tableFolders.options[1].value )
{
tableFolders.options.remove(1);
}
if ( s != "" )
{
var folders = s.split(",");
for ( j = 0; j < folders.length -1; j++)
{
option = document.createElement("OPTION");
option.value = folders[j];
option.text = folders[j];
tableFolders.add(option);
}
}
}
}
}
</script>

 

 

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