<input type="file" name="f" id="f" value="上传文件"/> <input type="button" value="获取上传图片的大小" id="g"/> @section scripts {     <script type="text/javascript">         $(function() {             $('#g').on("click", function() {                 getFileSize("f");             });         });         function getFileSize(eleId) {             try {                 var size = 0;                                if ($.browser.msie) {//ie旧版浏览器                     var fileMgr = new ActiveXObject("Scripting.FileSystemObject");                     var filePath = $('#' + eleId)[0].value;                     var fileObj = fileMgr.getFile(filePath);                     size = fileObj.size; //byte                     size = size / 1024;//kb                     //size = size / 1024;//mb                 } else {//其它浏览器                     size = $('#' + eleId)[0].files[0].size;//byte                     size = size / 1024;//kb                     //size = size / 1024;//mb                 }                 alert('上传文件大小为' + size + 'kb');             } catch (e) {                 alert("错误：" + e);             }         }     </script> }