使用AngularJS上传文件

这是我的HTML表单:

<form name="myForm" ng-submit="">
    <input ng-model='file' type="file"/>
    <input type="submit" value='Submit'/>
</form>

我想从本地机器上传一个图像，并想读取上传文件的内容。所有这些我都想用AngularJS来做。

当我试图打印$scope的值时。文件是未定义的。

当前回答

最简单的是使用HTML5 API，即FileReader

HTML非常简单:

<input type="file" id="file" name="file"/>
<button ng-click="add()">Add</button>

在你的控制器中定义'add'方法:

$scope.add = function() {
    var f = document.getElementById('file').files[0],
        r = new FileReader();

    r.onloadend = function(e) {
      var data = e.target.result;
      //send your binary data via $http or $resource or do anything else with it
    }

    r.readAsBinaryString(f);
}

浏览器兼容性

桌面浏览器

Edge 12, Firefox(Gecko) 3.6(1.9.2)， Chrome 7, Opera* 12.02, Safari 6.0.2

移动浏览器

Firefox(壁虎)32, Chrome 3, 歌剧* 11.5, Safari 6.1

注意:readAsBinaryString()方法已弃用，应该使用readAsArrayBuffer()代替。

2014-03-20 16:08:01

其他回答

您可以考虑使用IaaS进行文件上传，例如Uploadcare。有一个针对它的Angular包:https://github.com/uploadcare/angular-uploadcare

从技术上讲，它被实现为一个指令，提供了不同的上传选项，以及小部件中上传图像的操作:

<uploadcare-widget
  ng-model="object.image.info.uuid"
  data-public-key="YOURKEYHERE"
  data-locale="en"
  data-tabs="file url"
  data-images-only="true"
  data-path-value="true"
  data-preview-step="true"
  data-clearable="true"
  data-multiple="false"
  data-crop="400:200"
  on-upload-complete="onUCUploadComplete(info)"
  on-widget-ready="onUCWidgetReady(widget)"
  value="{{ object.image.info.cdnUrl }}"
 />

更多配置选项:https://uploadcare.com/widget/configure/

2014-10-10 07:37:31

下面是文件上传的工作示例:

http://jsfiddle.net/vishalvasani/4hqVu/

在这个函数中

setFiles

从视图更新控制器中的文件数组

你可以使用AngularJS检查jQuery文件上传

http://blueimp.github.io/jQuery-File-Upload/angularjs.html

2013-09-02 10:53:09

我想这是angular文件的上传:

ng-file-upload

用来上传文件的轻量级Angular JS指令。

这里是演示页面。特性

Supports upload progress, cancel/abort upload while in progress, File drag and drop (html5), Directory drag and drop (webkit), CORS, PUT(html5)/POST methods, validation of file type and size, show preview of selected images/audio/videos. Cross browser file upload and FileReader (HTML5 and non-HTML5) with Flash polyfill FileAPI. Allows client side validation/modification before uploading the file Direct upload to db services CouchDB, imgur, etc... with file's content type using Upload.http(). This enables progress event for angular http POST/PUT requests. Seperate shim file, FileAPI files are loaded on demand for non-HTML5 code meaning no extra load/code if you just need HTML5 support. Lightweight using regular $http to upload (with shim for non-HTML5 browsers) so all angular $http features are available

https://github.com/danialfarid/ng-file-upload

2015-05-14 07:30:25

该代码将帮助插入文件

<body ng-app = "myApp">
<form ng-controller="insert_Ctrl"  method="post" action=""  name="myForm" enctype="multipart/form-data" novalidate>
    <div>
        <p><input type="file" ng-model="myFile" class="form-control"  onchange="angular.element(this).scope().uploadedFile(this)">
            <span style="color:red" ng-show="(myForm.myFile.$error.required&&myForm.myFile.$touched)">Select Picture</span>
        </p>
    </div>
    <div>
        <input type="button" name="submit"  ng-click="uploadFile()" class="btn-primary" ng-disabled="myForm.myFile.$invalid" value="insert">
    </div>
</form>
<script src="http://ajax.googleapis.com/ajax/libs/angularjs/1.4.8/angular.min.js"></script> 
<script src="insert.js"></script>
</body>

insert.js

var app = angular.module('myApp',[]);
app.service('uploadFile', ['$http','$window', function ($http,$window) {
    this.uploadFiletoServer = function(file,uploadUrl){
        var fd = new FormData();
        fd.append('file', file);
        $http.post(uploadUrl, fd, {
            transformRequest: angular.identity,
            headers: {'Content-Type': undefined}
        })
        .success(function(data){
            alert("insert successfull");
            $window.location.href = ' ';//your window location
        })
        .error(function(){
            alert("Error");
        });
    }
}]);
app.controller('insert_Ctrl',  ['$scope', 'uploadFile', function($scope, uploadFile){
    $scope.uploadFile = function() {
        $scope.myFile = $scope.files[0];
        var file = $scope.myFile;
        var url = "save_data.php";
        uploadFile.uploadFiletoServer(file,url);
    };
    $scope.uploadedFile = function(element) {
        var reader = new FileReader();
        reader.onload = function(event) {
            $scope.$apply(function($scope) {
                $scope.files = element.files;
                $scope.src = event.target.result  
            });
        }
        reader.readAsDataURL(element.files[0]);
    }
}]);

save_data.php

<?php
    require "dbconnection.php";
    $ext = pathinfo($_FILES['file']['name'],PATHINFO_EXTENSION);
    $image = time().'.'.$ext;
    move_uploaded_file($_FILES["file"]["tmp_name"],"upload/".$image);
    $query="insert into test_table values ('null','$image')";
    mysqli_query($con,$query);
?>

2018-02-19 07:37:39

以上接受的答案不兼容浏览器。如果有人有兼容性问题，试试这个。

小提琴

视图代码

 <div ng-controller="MyCtrl">
      <input type="file" id="file" name="file"/>
      <br>
      <button ng-click="add()">Add</button>
      <p>{{data}}</p>
    </div>

控制器代码

var myApp = angular.module('myApp',[]);

function MyCtrl($scope) {
    $scope.data = 'none';    
    $scope.add = function(){
      var f = document.getElementById('file').files[0],
          r = new FileReader();
      r.onloadend = function(e){        
          var binary = "";
var bytes = new Uint8Array(e.target.result);
var length = bytes.byteLength;

for (var i = 0; i < length; i++) 
{
    binary += String.fromCharCode(bytes[i]);
}

$scope.data = (binary).toString();

          alert($scope.data);
      }
      r.readAsArrayBuffer(f);
    }
}

2015-08-11 22:42:47

使用AngularJS上传文件

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