<script type="text/javascript">

    var applicationPath = window.applicationPath === "" ? "" : window.applicationPath || "../../";

    var GUID = WebUploader.Base.guid();//一个GUID

    $(function () {

        var $ = jQuery;

        var uploader = WebUploader.create({

            // 选完文件后，是否自动上传。

            auto: false,

            // swf文件路径

            swf: applicationPath + './Content/Scripts/webuploader/Uploader.swf',

            // 文件接收服务端。

            server: applicationPath + '/QuotationModule/PQuotation_Offer/Upload',

            // 选择文件的按钮。可选。

            // 内部根据当前运行是创建，可能是input元素，也可能是flash.

            pick: '#uploadify',

            chunked: true,//开始分片上传

            chunkSize: 2048000,//每一片的大小

            formData: {

                guid: GUID //自定义参数，待会儿解释

            },

            // 不压缩image, 默认如果是jpeg，文件上传前会压缩一把再上传！

            resize: false

        });

        // 当有文件被添加进队列的时候

        uploader.on('fileQueued', function (file) {

            //$list.append('<div id="' + file.id + '" class="item">' +

            //    '<h4 class="info">' + file.name + '</h4>' +

            //    '<p class="state">等待上传...</p>' +

            //    '</div>');

            //alert(11);

            var name = file.name;    //文件名

            var type = fileType(file.name);    //文件类型，获取的是文件的后缀

            var volume = bytesToSize(file.size);    //文件大小格式化

            document.getElementById("tt").style.display = "block";

            document.getElementById("tt").innerHTML = name + type + "等待上传。。。";

            //var oTr = $("<tr></tr>");

            //var str = '<td><cite title="' + name + '">' + name + '</cite></td>';

            //str += '<td>' + type + '</td>';

            //str += '<td>' + volume + '</td>';

            //str += '<td id="jintutiao">';

            //str += '<span id="baifenbi"></span>0%';

            //str += '</td>';

            //str += '<td id="uploding">等待上传</td>';

            //$(".fileList").html(str)

        });

        var aa = 1;

        // 文件上传过程中创建进度条实时显示。

        uploader.on('uploadProgress', function (file, percentage) {

            //var $li = $('#' + file.id),

            //    $percent = $li.find('.progress .progress-bar');

            //// 避免重复创建

            //if (!$percent.length) {

            //    $percent = $('<div class="progress progress-striped active">' +

            //        '<div class="progress-bar" role="progressbar" style="width: 0%">' +

            //        '</div>' +

            //        '</div>').appendTo($li).find('.progress-bar');

            //}

            //$li.find('p.state').text('上传中');

            //$("#uploding").html("上传中");

            //$percent.css('width', percentage * 100 + '%');

            //if (percentage == 1) {

            //    aa++;

            //}

            //if (aa <= 2) {

            //    var shuzi = percentage * 100;

            //    $("#baifenbi").html(shuzi.toFixed(2));

            //}

        });

        // 文件上传成功，给item添加成功class, 用样式标记上传成功。

        uploader.on('uploadSuccess', function (file, response) {

            //$('#' + file.id).find('p.state').text('已上传');

            $.post('/QuotationModule/PQuotation_Offer/Merge', { guid: GUID, fileName: file.name }, function (data) {

                //console.log(data);

                //alert(data.filepath);

                alert("上传成功!");

                Loading(false, "文件上传中！");

                var address = data.filepath;

                $("#attach").val(data.filepath);

                $("#attachName").val(data.fileName);

                //alert($("#offerAttach").val());

                address = address.replace('~', '../../../../');

                document.getElementById("tt").style.display = "block";

                document.getElementById("tt").innerHTML = "<a href=\"" + address + "\" download=\"" + data.fileName + "\">" + data.fileName + "</a>";

            });

        });

        // 文件上传失败，显示上传出错。

        uploader.on('uploadError', function (file) {

            alert('上传出错');

        });

        // 完成上传完了，成功或者失败，先删除进度条。

        uploader.on('uploadComplete', function (file) {

            //$('#' + file.id).find('.progress').fadeOut();

        });

        //所有文件上传完毕

        uploader.on("uploadFinished", function () {

            //提交表单

        });

        //开始上传

        $("#ctlBtn").click(function () {

            Loading(true, "文件上传中！");

            uploader.upload();

        });

    });

    //字节大小转换，参数为b

    function bytesToSize(bytes) {

        var sizes = ['Bytes', 'KB', 'MB', 'G'];

        if (bytes == 0) return 'n/a';

        var i = parseInt(Math.floor(Math.log(bytes) / Math.log(1024)));

        return (bytes / Math.pow(1024, i)).toFixed(1) + ' ' + sizes[i];

    };

    //通过文件名，返回文件的后缀名

    function fileType(name) {

        var nameArr = name.split(".");

        return nameArr[nameArr.length - 1].toLowerCase();

    }

</script>

        [HttpPost]

        public ActionResult Upload()

        {

            string fileName = Request["name"];

            string fileRelName = fileName.Substring(, fileName.LastIndexOf('.'));//设置临时存放文件夹名称

            int index = Convert.ToInt32(Request["chunk"]);//当前分块序号

            var guid = Request["guid"];//前端传来的GUID号

            var dir = Server.MapPath("~/Upload");//文件上传目录

            dir = Path.Combine(dir, fileRelName);//临时保存分块的目录

            if (!System.IO.Directory.Exists(dir))

                System.IO.Directory.CreateDirectory(dir);

            string filePath = Path.Combine(dir, index.ToString());//分块文件名为索引名，更严谨一些可以加上是否存在的判断，防止多线程时并发冲突

            var data = Request.Files["file"];//表单中取得分块文件

            string extension = data.FileName.Substring(data.FileName.LastIndexOf(".") + ,

                (data.FileName.Length - data.FileName.LastIndexOf(".") - ));//获取文件扩展名

            //if (data != null)//为null可能是暂停的那一瞬间

            //{

            data.SaveAs(filePath + fileName);

            //}

            return Json(new { erron =  });//Demo，随便返回了个值，请勿参考

        }

        public ActionResult Merge()

        {

            var guid = Request["guid"];//GUID

            var uploadDir = Server.MapPath("~/Upload");//Upload 文件夹

            var fileName = Request["fileName"];//文件名

            string fileRelName = fileName.Substring(, fileName.LastIndexOf('.'));

            var dir = Path.Combine(uploadDir, fileRelName);//临时文件夹

            var files = System.IO.Directory.GetFiles(dir);//获得下面的所有文件

            string fileGuid = CommonHelper.GetGuid;

            string extension = fileName.Substring(fileName.LastIndexOf(".") + ,

                (fileName.Length - fileName.LastIndexOf(".") - ));//获取文件扩展名

            string uploadDate = DateTime.Now.ToString("yyyyMMdd");

            //string UserId = ManageProvider.Provider.Current().UserId;

            string virtualPath = string.Format("~/Resource/Document/NetworkDisk/{0}/{1}/{2}{3}", "Offer", uploadDate, fileGuid, "."+extension);

            var finalPath = Server.MapPath(virtualPath);//最终的文件名（demo中保存的是它上传时候的文件名，实际操作肯定不能这样）

            //创建文件夹，保存文件

            string path = Path.GetDirectoryName(finalPath);

            Directory.CreateDirectory(path);

            var fs = new FileStream(finalPath, FileMode.Create);

            foreach (var part in files.OrderBy(x => x.Length).ThenBy(x => x))//排一下序，保证从0-N Write

            {

                var bytes = System.IO.File.ReadAllBytes(part);

                fs.Write(bytes, , bytes.Length);

                bytes = null;

                System.IO.File.Delete(part);//删除分块

            }

            fs.Flush();

            fs.Close();

            System.IO.Directory.Delete(dir);//删除文件夹

            return Json(new { filepath = virtualPath, fileName = fileRelName });//返回文件存储的路径，以及文件原来的名称

        }