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

简单的指令

Html:

<input type="file" file-upload multiple/>

JS:

app.directive('fileUpload', function () {
return {
    scope: true,        //create a new scope
    link: function (scope, el, attrs) {
        el.bind('change', function (event) {
            var files = event.target.files;
            //iterate files since 'multiple' may be specified on the element
            for (var i = 0;i<files.length;i++) {
                //emit event upward
                scope.$emit("fileSelected", { file: files[i] });
            }                                       
        });
    }
};

在指令中,我们确保创建了一个新的作用域,然后监听对文件输入元素所做的更改。当检测到更改时,以文件对象作为参数向所有祖先作用域(向上)发出事件。

在你的控制器中:

$scope.files = [];

//listen for the file selected event
$scope.$on("fileSelected", function (event, args) {
    $scope.$apply(function () {            
        //add the file object to the scope's files collection
        $scope.files.push(args.file);
    });
});

然后在ajax调用中:

data: { model: $scope.model, files: $scope.files }

http://shazwazza.com/post/uploading-files-and-json-data-in-the-same-request-with-angular-js/

其他回答

我知道这是一个较晚的条目,但我已经创建了一个简单的上传指令。你可以在任何时间工作!

<input type="file" multiple ng-simple-upload web-api-url="/api/Upload" callback-fn="myCallback" />

在Github上上传更多使用Web API的示例。

上传文件

<input type="file" name="resume" onchange="angular.element(this).scope().uploadResume()" ng-model="fileupload" id="resume" />


        $scope.uploadResume = function () { 
            var f = document.getElementById('resume').files[0];
            $scope.selectedResumeName = f.name;
            $scope.selectedResumeType = f.type;
            r = new FileReader();

            r.onloadend = function (e) { 
                $scope.data = e.target.result;
            }

            r.readAsDataURL(f);

        };

下载文件:

          <a href="{{applicant.resume}}" download> download resume</a>

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

            app.config(['$compileProvider', function ($compileProvider) {
                $compileProvider.aHrefSanitizationWhitelist(/^\s*(https?|local|data|chrome-extension):/);
                $compileProvider.imgSrcSanitizationWhitelist(/^\s*(https?|local|data|chrome-extension):/);

            }]);

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。

我们使用了HTML, CSS和AngularJS。下面的例子展示了如何使用AngularJS上传文件。

<html>

   <head>
      <script src = "https://ajax.googleapis.com/ajax/libs/angularjs/1.3.14/angular.min.js"></script>
   </head>

   <body ng-app = "myApp">

      <div ng-controller = "myCtrl">
         <input type = "file" file-model = "myFile"/>
         <button ng-click = "uploadFile()">upload me</button>
      </div>

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

         myApp.directive('fileModel', ['$parse', function ($parse) {
            return {
               restrict: 'A',
               link: function(scope, element, attrs) {
                  var model = $parse(attrs.fileModel);
                  var modelSetter = model.assign;

                  element.bind('change', function(){
                     scope.$apply(function(){
                        modelSetter(scope, element[0].files[0]);
                     });
                  });
               }
            };
         }]);

         myApp.service('fileUpload', ['$http', function ($http) {
            this.uploadFileToUrl = function(file, uploadUrl){
               var fd = new FormData();
               fd.append('file', file);

               $http.post(uploadUrl, fd, {
                  transformRequest: angular.identity,
                  headers: {'Content-Type': undefined}
               })

               .success(function(){
               })

               .error(function(){
               });
            }
         }]);

         myApp.controller('myCtrl', ['$scope', 'fileUpload', function($scope, fileUpload){
            $scope.uploadFile = function(){
               var file = $scope.myFile;

               console.log('file is ' );
               console.dir(file);

               var uploadUrl = "/fileUpload";
               fileUpload.uploadFileToUrl(file, uploadUrl);
            };
         }]);

      </script>

   </body>
</html>

简单的指令

Html:

<input type="file" file-upload multiple/>

JS:

app.directive('fileUpload', function () {
return {
    scope: true,        //create a new scope
    link: function (scope, el, attrs) {
        el.bind('change', function (event) {
            var files = event.target.files;
            //iterate files since 'multiple' may be specified on the element
            for (var i = 0;i<files.length;i++) {
                //emit event upward
                scope.$emit("fileSelected", { file: files[i] });
            }                                       
        });
    }
};

在指令中,我们确保创建了一个新的作用域,然后监听对文件输入元素所做的更改。当检测到更改时,以文件对象作为参数向所有祖先作用域(向上)发出事件。

在你的控制器中:

$scope.files = [];

//listen for the file selected event
$scope.$on("fileSelected", function (event, args) {
    $scope.$apply(function () {            
        //add the file object to the scope's files collection
        $scope.files.push(args.file);
    });
});

然后在ajax调用中:

data: { model: $scope.model, files: $scope.files }

http://shazwazza.com/post/uploading-files-and-json-data-in-the-same-request-with-angular-js/