function filesModelDirective(){
  return {
    controller: function($parse, $element, $attrs, $scope){
      var exp = $parse($attrs.filesModel);
      $element.on('change', function(){
        exp.assign($scope, this.files[0]);
        $scope.$apply();
      });
    }
  };
}
app.directive('filesModel', filesModelDirective);

试试这个，这在angular JS中对我有用

    let fileToUpload = `${documentLocation}/${documentType}.pdf`;
    let absoluteFilePath = path.resolve(__dirname, fileToUpload);
    console.log(`Uploading document ${absoluteFilePath}`);
    element.all(by.css("input[type='file']")).sendKeys(absoluteFilePath);

对于使用lodash或下划线输入的多个文件:

.directive("fileread", [function () {
    return {
        scope: {
            fileread: "="
        },
        link: function (scope, element, attributes) {
            element.bind("change", function (changeEvent) {
                return _.map(changeEvent.target.files, function(file){
                  scope.fileread = [];
                  var reader = new FileReader();
                  reader.onload = function (loadEvent) {
                      scope.$apply(function () {
                          scope.fileread.push(loadEvent.target.result);
                      });
                  }
                  reader.readAsDataURL(file);
                });
            });
        }
    }
}]);

我创建了一个指令并在bower上注册。

这个库将帮助您建模输入文件，不仅返回文件数据，而且还返回文件dataurl或base64。

{
    "lastModified": 1438583972000,
    "lastModifiedDate": "2015-08-03T06:39:32.000Z",
    "name": "gitignore_global.txt",
    "size": 236,
    "type": "text/plain",
    "data": "data:text/plain;base64,DQojaWdub3JlIHRodW1ibmFpbHMgY3JlYXRlZCBieSB3aW5kb3dz…xoDQoqLmJhaw0KKi5jYWNoZQ0KKi5pbGsNCioubG9nDQoqLmRsbA0KKi5saWINCiouc2JyDQo="
}

https://github.com/mistralworks/ng-file-model/

我用指令创建了一个变通方法:

.directive("fileread", [function () {
    return {
        scope: {
            fileread: "="
        },
        link: function (scope, element, attributes) {
            element.bind("change", function (changeEvent) {
                var reader = new FileReader();
                reader.onload = function (loadEvent) {
                    scope.$apply(function () {
                        scope.fileread = loadEvent.target.result;
                    });
                }
                reader.readAsDataURL(changeEvent.target.files[0]);
            });
        }
    }
}]);

input标签变成:

<input type="file" fileread="vm.uploadme" />

或者如果只需要文件定义:

.directive("fileread", [function () {
    return {
        scope: {
            fileread: "="
        },
        link: function (scope, element, attributes) {
            element.bind("change", function (changeEvent) {
                scope.$apply(function () {
                    scope.fileread = changeEvent.target.files[0];
                    // or all selected files:
                    // scope.fileread = changeEvent.target.files;
                });
            });
        }
    }
}]);

或者你可以获取输入并设置onchange函数:

<input type="file" id="myFileInput" />

document.getElementById("myFileInput").onchange = function (event) {
   console.log(event.target.files);                        
};