Javascript 使用AngularJS上传文件
我是新手。我正在尝试构建一个功能,从angular UI上传excel工作表,并将其数据传递给REST API以进一步处理它。 请在下面找到我的代码 Dashboard.jsp 我试图使文件对象处于警报状态,但它给我以下错误Javascript 使用AngularJS上传文件,javascript,angularjs,excel,Javascript,Angularjs,Excel,我是新手。我正在尝试构建一个功能,从angular UI上传excel工作表,并将其数据传递给REST API以进一步处理它。 请在下面找到我的代码 Dashboard.jsp 我试图使文件对象处于警报状态,但它给我以下错误 TypeError: Cannot read property 'files' of undefined at ChildScope.$scope.fileChanged (script.js:25) at fn (eval at compile (angu
TypeError: Cannot read property 'files' of undefined
at ChildScope.$scope.fileChanged (script.js:25)
at fn (eval at compile (angular.js:15156), <anonymous>:4:153)
at callback (angular.js:26744)
at ChildScope.$eval (angular.js:17972)
at ChildScope.$apply (angular.js:18072)
at HTMLButtonElement.<anonymous> (angular.js:26749)
at defaultHandlerWrapper (angular.js:3613)
at HTMLButtonElement.eventHandler (angular.js:3601)
TypeError:无法读取未定义的属性“文件”
在ChildScope.$scope.fileChanged(script.js:25)
在fn(编译时求值(angular.js:15156),:4:153)
回调时(angular.js:26744)
在ChildScope.$eval(angular.js:17972)
在ChildScope.$apply(angular.js:18072)
在HTMLButtoneElement。(angular.js:26749)
在defaultHandlerWrapper(angular.js:3613)
在HTMLButtonElement.eventHandler(angular.js:3601)
我不懂JSP,所以我可以用HTML简单地编写代码。这可能有助于解决您的问题。我可以试着指导你解决一个问题。请复习这篇文章,可能会对你有所帮助
HTML
将指令“fileInput”放在何处?上载我并尝试使用:$scope.files=elm.target.files不作为elm值工作是未定义的。我不明白为什么“elm”的值在控制器块中是未定义的,并且链接块中的“elm”有一些值出现警报。非常感谢Dipak…这是一个很大的帮助…我做了一些更改,现在我将文件作为对象获取。
var msaApp1 = angular.module("msaApp",[]);
msaApp1.directive('fileInput',['$parse',function($parse)
{
return{
restrict:'A',
link:function(scope,elm,attrs)
{
alert(elm);
elm.bind('change',function()
{
$parse(attrs.fileInput)
.assign(scope,elm[0].files)
scope.$apply()
})
}
}
}]).controller('fileController' , ['$scope','$http', function($scope,$http)
{
$scope.fileChanged=function(elm)
{
alert(elm);
$scope.files=elm.files
$scope.apply();
alert($scope.files);
}
}])
TypeError: Cannot read property 'files' of undefined
at ChildScope.$scope.fileChanged (script.js:25)
at fn (eval at compile (angular.js:15156), <anonymous>:4:153)
at callback (angular.js:26744)
at ChildScope.$eval (angular.js:17972)
at ChildScope.$apply (angular.js:18072)
at HTMLButtonElement.<anonymous> (angular.js:26749)
at defaultHandlerWrapper (angular.js:3613)
at HTMLButtonElement.eventHandler (angular.js:3601)
<html ng-app="fUploadApp">
<head><title>File upload</title></head>
<body>
<div ng-controller = "myCtrl">
<input type = "file" file-model = "myFile"/>
<button ng-click = "uploadFile()">Upload File</button>
</div>
<script src="angular.min.js"></script>
<script src="app.js"></script>
</body>
</html>
var fUploadApp = angular.module('fUploadApp', []);
fUploadApp.directive('fileModel', ['$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]);
});
});
}
};
}]);
fUploadApp.service('fileUpload', ['$http', function ($http) {
this.uploadFileToUrl = function(file, uploadUrl){
var fd = new FormData();
fd.append('file', file);
$http.post(uploadUrl, fd, {
transformRequest: angular.identity,
headers: {'Content-Type': undefined}
})
.success(function(){
})
.error(function(){
});
}
}]);
fUploadApp.controller('myCtrl', ['$scope', 'fileUpload', function($scope, fileUpload){
$scope.uploadFile = function(){
var file = $scope.myFile;
var uploadUrl = "/savedata";
fileUpload.uploadFileToUrl(file, uploadUrl);
};
}]);