单个文件上传（带进度条，上传比例）

<script src="~/Scripts/jquery-1.9.1.min.js"></script>
<link href="~/Scripts/1/bootstrap.css" rel="stylesheet" />
<link href="~/Scripts/1/webuploader.css" rel="stylesheet" />

<script src="~/Scripts/1/webuploader.js"></script>
<script src="~/Scripts/1/bootstrap.min.js"></script>
@*<script src="~/Scripts/1/webuploader.js"></script>*@

<div id="uploader" class="wu-example">
    <!--用来存放文件信息-->
    <div id="thelist" class="uploader-list"></div>
    <div class="btns">
        <div id="picker">选择文件</div>
      
    </div>
</div>


<span style="font-size: 14px;">
    <script type="text/javascript">
        $(function () {
            /*init webuploader*/
            var $list = $("#thelist");   //这几个初始化全局的百度文档上没说明。  
            var $btn = $("#ctlBtn");   //开始上传 
            var Size = 0;
            var uploader = WebUploader.create({
                auto: true,
                // swf文件路径
                swf: '/Scripts/1/Uploader.swf',

                // 文件接收服务端。
                server: '/Home/UpLoadProcess/',

                // 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: {
                    id: '#picker',
                    //只能选择一个文件上传
                    multiple: false
                },
                fileSingleSizeLimit: 100*1024*1024,   //设定单个文件大小
                //限制只能上传一个文件
                fileNumLimit: 1,

                // 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,
                chunked: true,//分片上传-大文件的时候分片上传，默认false
                chunkSize:500*1024,
                //// 只允许选择文件。
                //accept: {
                //    title: 'Applications',
                //    extensions: 'xls,xlsx,doc,docx,ppt,pptx',
                //    mimeTypes: 'application/xls,application/xlsx,application/doc,application/docx,application/ppt,application/pptx'
                //}

            });

            
            // 当有文件被添加进队列的时候
            uploader.on('fileQueued', function (file) {
               // 判断当前上传文件的格式
                if (uploader.getFiles()[uploader.getFiles().length - 1].ext.toLowerCase() != "docx" && uploader.getFiles()[uploader.getFiles().length - 1].ext.toLowerCase() != "doc" && uploader.getFiles()[uploader.getFiles().length - 1].ext.toLowerCase() != "xlsx" && uploader.getFiles()[uploader.getFiles().length - 1].ext.toLowerCase() != "xls" && uploader.getFiles()[uploader.getFiles().length - 1].ext.toLowerCase() != "pptx" && uploader.getFiles()[uploader.getFiles().length - 1].ext.toLowerCase() != "ppt" && uploader.getFiles()[uploader.getFiles().length - 1].ext.toLowerCase() != "mp4" && uploader.getFiles()[uploader.getFiles().length - 1].ext.toLowerCase() != "swf" && uploader.getFiles()[uploader.getFiles().length - 1].ext.toLowerCase() != "pdf" && uploader.getFiles()[uploader.getFiles().length - 1].ext.toLowerCase() != "jpg" && uploader.getFiles()[uploader.getFiles().length - 1].ext.toLowerCase() != "png") {
                    alert("上传格式不正确！");
                }
                else {
                    var $li = $('#' + file.id),
                          $percent = $li.find('.info');

                    if (!$percent.length) {
                        $list.html('<div id="' + file.id + '" class="item">' +
                         '<h4 class="info">' + file.name + '</h4>' +
                         '<p class="state">等待上传...</p>' +
                        '</div>' + ' <span id="iid"></span><span id="all"></span>');
                    }
                }
                
            });


            // 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 = $('<div class="progress ctive">' +
                     '<div class="progress-bar" role="progressbar" style=" 0%">' +
                     '</div>' +
                    '</div>').appendTo($li).find('.progress-bar');
                }
               
                $li.find('p.state').text('上传中');
                $percent.css('width', percentage * 100 + '%');//进度条
                //上传期间所上传占总的比例
                var nowSize = 0;//已上传大小
                var gb = Math.pow(1024, 3);
                var mb = Math.pow(1024, 2);
                var kb = 1024;
                var fileSize = uploader.getFiles()[uploader.getFiles().length - 1].size;//总大小
                if (fileSize >= gb) {
                    var fz = (fileSize / gb).toFixed(2);
                    Size = fz + "GB";
                    nowSize = (fz * percentage).toFixed(2) + "GB";
                }
                else if (fileSize >= mb)
                {
                    var fz = (fileSize / mb).toFixed(2);
                    Size = fz + "MB";
                    nowSize = (fz * percentage).toFixed(2) + "MB";
                }
                else if (fileSize >= kb)
                {
                    var fz = (fileSize / kb).toFixed(2);
                    Size = fz + "KB";
                    nowSize = (fz * percentage).toFixed(2) + "KB";
                }
                else
                {
                    var fz = fileSize;
                    Size = fz + "B";
                    nowSize = fz * percentage + "B";
                }
              
                $("#iid").html(nowSize);//已上传大小
                $("#all").html("/"+Size);//总大小
              
                
                
            });
            uploader.on('uploadSuccess', function (file, response) {
                console.log(response._raw);
                $('#' + file.id).find('p.state').text('已完成');
            });

            uploader.on('uploadError', function (file) {
                console.log(file);
                $('#' + file.id).find('p.state').text('上传出错');
            });

            uploader.on('uploadComplete', function (file) {
                //$('#' + file.id).find('.progress').fadeOut();
               
            });

            /**
* 验证文件格式以及文件大小
*/
            uploader.on("error", function (type) {
               
               if (type == "F_EXCEED_SIZE") {
                    alert("文件大小不能超过100M");
                }
                else {
                    alert("上传出错！请检查后重新上传！错误代码" + type);
                }
            });
        });
    </script>
</span>