asp.net读取磁盘文件、删除实例代码

    protected void readfile()     //读取文件夹，文件
    {
        string savepath = @"common";
        stringbuilder outstring = new stringbuilder();
        string abssavepath = server.mappath(savepath);
        string[] directorys = directory.getdirectories(abssavepath + @"/" + page.user.identity.name);
        //for (int i = 0; i < directorys.length; i++)
        //{
        //    response.write(directorys[i] + " <br/ >");
        //}
        //response.write("directorys count：" + directorys.length + "个  <br/ >--------- <br >");
        string[] files = directory.getfiles(abssavepath + @"" + page.user.identity.name, "*");
        outstring.append("<ul>");
        for (int i = 0; i < files.length; i++)
        {
            if (path.getfilename(files[i]) != "thumbs.db")
            {
                outstring.append("<li><img src=/"common/" + path.getfilename(files[i]) + "/" style=/"width:100px;height:100px;/" /><br/><input type=/"checkbox/" value=/"common/" + path.getfilename(files[i]) + "/" name=/"picname/" onclick=/"getpicid();/" id=/"imgid" + i.tostring() + "/" /><label for=/"imgid" + i.tostring() + "/">" + path.getfilename(files[i]) + "</label></li>");
            }
        }
        outstring.append("</ul>");
        response.write(outstring.tostring());
    }

//删除文件
        string[] strpicname = request["imgids"].split(new char[] { ',' });
        for (int i = 0; i < strpicname.length; i++)
        {
            file.delete(server.mappath(strpicname[i].tostring()));
        }

//循环遍历复选框
<script language="javascript" type="text/javascript" defer="defer">
    var imgnum = document.getelementsbytagname("input");
    var imgids = "";
    function getpicid()
    {
        document.getelementbyid("hidimgid").value = "";
        for (var i=0;i<imgnum.length;i++)
        {
            if ( imgnum[i].type == "checkbox" && imgnum[i].name == "picname" && imgnum[i].checked)
            {
                imgids += imgids == "" ? imgnum[i].value : "," + imgnum[i].value;
            }
        }
        document.getelementbyid("hidimgid").value = imgids;
    }
    </script>