文件夹选择对话框 JS实现的两种方案

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文件夹选择对话框 JS实现的两种方案

/**
 * 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；
 *
 * 用一般的触发函数均可在HTML文件中使用该函数
 * 例如：<input type="button" onclick="BrowseFolder()" />
 * 注意：请定义NAME为savePath的输入框接收或显示返回的值，例如：
 *    <input type="text" name="savePath" /> 
 *
 * <SPAN style="COLOR: #ff0000">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,</SPAN>
 * <SPAN style="COLOR: #ff0000">否者会出现"没有权限"的问题.</SPAN>
 *
 * 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"  
 */ 
function BrowseFolder(){
 try{
  var Message = "请选择文件夹";  //选择框提示信息
  var Shell = new ActiveXObject( "Shell.Application" );
  var Folder = Shell.BrowseForFolder(0,Message,0x0040,0x11);//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.all.savePath.value=Folder;
  
    document.getElementById("savePath").value=Folder;//savePath是指输出的控件id。
  
    return Folder;
  }
 }catch(e){ 
  alert(e.message);
 }
}

另外一种不存在安全问题的方法是使用js自己来实现文件夹选择，会丑一些。

<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></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>

原文地址 http://www.cnblogs.com/jiji262/archive/2012/06/08/2541837.html

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