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10-02
25

javascript文件夹选择框的两种解决方案

作者:Java伴侣 日期:2010-02-25

字体大小: 小 中 大
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:
复制内容到剪贴板程序代码 程序代码
/**//***
    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:
复制内容到剪贴板程序代码 程序代码

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


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.
复制内容到剪贴板程序代码 程序代码

<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
*/
[code]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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[本日志由 blurxx 于 2010-02-25 01:59 PM 编辑]
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