JS gets the contents of the uploaded file

<div>    Upload file: <input type= "file" name = "file" id = "FileId"/>     <button  type = "Submit" name = "  BTN "value =" commit "id =" Btnid "onclick=" check () "/> Submit </div><script>    function Check () {         var objfile = document.getElementById ("FileId");        if (Objfile.value = = "") {            alert ("Cannot be Empty")        }        Console.log (Objfile.files[0]); File information        var files = $ (' #fileId '). Prop (' files ');//Get to File list        if (files.length = = 0) {            alert (' Select File ');        } else{            var reader = new FileReader ();//Create a new FileReader            Reader.readastext (files[0], "UTF-8");//Read File             Reader.onload = function (evt) {//After reading the file will come back here                var filestring = Evt.target.result;//Read file contents        }    }   }

Note: This content is from http://www.cnblogs.com/chenmo-xpw/p/5629917.html

JS gets the contents of the uploaded file