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

使用简单指令的示例(ng-file-model):

.directive("ngFileModel", [function () {
  return {
      $scope: {
          ngFileModel: "="
      },
      link: function ($scope:any, element, attributes) {
          element.bind("change", function (changeEvent:any) {
              var reader = new FileReader();
              reader.onload = function (loadEvent) {
                  $scope.$apply(function () {
                      $scope.ngFileModel = {
                          lastModified: changeEvent.target.files[0].lastModified,
                          lastModifiedDate: changeEvent.target.files[0].lastModifiedDate,
                          name: changeEvent.target.files[0].name,
                          size: changeEvent.target.files[0].size,
                          type: changeEvent.target.files[0].type,
                          data: changeEvent.target.files[0]
                      };
                  });
              }
              reader.readAsDataURL(changeEvent.target.files[0]);
          });
      }
  }
}])

并使用FormData在函数中上传文件。

var formData = new FormData();
 formData.append("document", $scope.ngFileModel.data)
 formData.append("user_id", $scope.userId)

所有学分都归 https://github.com/mistralworks/ng-file-model

我遇到了一个小问题,你可以在这里查看: https://github.com/mistralworks/ng-file-model/issues/7

最后,这里是一个分叉的回购:https://github.com/okasha93/ng-file-model/blob/patch-1/ng-file-model.js

其他回答

您的文件和json数据同时上传。

// FIRST SOLUTION var _post = function (file, jsonData) { $http({ url: your url, method: "POST", headers: { 'Content-Type': undefined }, transformRequest: function (data) { var formData = new FormData(); formData.append("model", angular.toJson(data.model)); formData.append("file", data.files); return formData; }, data: { model: jsonData, files: file } }).then(function (response) { ; }); } // END OF FIRST SOLUTION // SECOND SOLUTION // If you can add plural file and If above code give an error. // You can try following code var _post = function (file, jsonData) { $http({ url: your url, method: "POST", headers: { 'Content-Type': undefined }, transformRequest: function (data) { var formData = new FormData(); formData.append("model", angular.toJson(data.model)); for (var i = 0; i < data.files.length; i++) { // add each file to // the form data and iteratively name them formData.append("file" + i, data.files[i]); } return formData; }, data: { model: jsonData, files: file } }).then(function (response) { ; }); } // END OF SECOND SOLUTION

使用简单指令的示例(ng-file-model):

.directive("ngFileModel", [function () {
  return {
      $scope: {
          ngFileModel: "="
      },
      link: function ($scope:any, element, attributes) {
          element.bind("change", function (changeEvent:any) {
              var reader = new FileReader();
              reader.onload = function (loadEvent) {
                  $scope.$apply(function () {
                      $scope.ngFileModel = {
                          lastModified: changeEvent.target.files[0].lastModified,
                          lastModifiedDate: changeEvent.target.files[0].lastModifiedDate,
                          name: changeEvent.target.files[0].name,
                          size: changeEvent.target.files[0].size,
                          type: changeEvent.target.files[0].type,
                          data: changeEvent.target.files[0]
                      };
                  });
              }
              reader.readAsDataURL(changeEvent.target.files[0]);
          });
      }
  }
}])

并使用FormData在函数中上传文件。

var formData = new FormData();
 formData.append("document", $scope.ngFileModel.data)
 formData.append("user_id", $scope.userId)

所有学分都归 https://github.com/mistralworks/ng-file-model

我遇到了一个小问题,你可以在这里查看: https://github.com/mistralworks/ng-file-model/issues/7

最后,这里是一个分叉的回购:https://github.com/okasha93/ng-file-model/blob/patch-1/ng-file-model.js

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。

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);
    }
}

HTML

<html>
    <head></head>

<body ng-app = "myApp">

  <form ng-controller = "myCtrl">
     <input type = "file" file-model="files" multiple/>
     <button ng-click = "uploadFile()">upload me</button>
     <li ng-repeat="file in files">{{file.name}}</li>
  </form>

脚本

  <script src = 
     "http://ajax.googleapis.com/ajax/libs/angularjs/1.3.14/angular.min.js"></script>
  <script>
    angular.module('myApp', []).directive('fileModel', ['$parse', function ($parse) {
        return {
           restrict: 'A',
           link: function(scope, element, attrs) {
              element.bind('change', function(){
              $parse(attrs.fileModel).assign(scope,element[0].files)
                 scope.$apply();
              });
           }
        };
     }]).controller('myCtrl', ['$scope', '$http', function($scope, $http){


       $scope.uploadFile=function(){
       var fd=new FormData();
        console.log($scope.files);
        angular.forEach($scope.files,function(file){
        fd.append('file',file);
        });
       $http.post('http://localhost:1337/mediaobject/upload',fd,
           {
               transformRequest: angular.identity,
               headers: {'Content-Type': undefined}                     
            }).success(function(d)
                {
                    console.log(d);
                })         
       }
     }]);

  </script>