Javascript 以角度js将值返回给控制器
我想将数据从服务发送回我的控制器,如果文件扩展数据块的大小如何实现,这里是我的代码Javascript 以角度js将值返回给控制器,javascript,angularjs,angular-services,angular-controller,Javascript,Angularjs,Angular Services,Angular Controller,我想将数据从服务发送回我的控制器,如果文件扩展数据块的大小如何实现,这里是我的代码 myApp.service('fileUpload', ['$http', function ($http) { this.uploadFileToUrl = function (fileData, uploadUrl) { if (fileData.size > 50000000) { var fd = new FormData(); fd.append('file'
myApp.service('fileUpload', ['$http', function ($http) {
this.uploadFileToUrl = function (fileData, uploadUrl) {
if (fileData.size > 50000000) {
var fd = new FormData();
fd.append('file', fileData);
$http.post(uploadUrl, fd, {
transformRequest: angular.identity,
headers: { 'Content-Type': undefined }
})
.success(function () {
})
.error(function () {
});
}
else {
return "Image size is more than 5MB";
}
}
}]);
您应该使用$q服务来延迟执行请求,如-
myApp.service('fileUpload', ['$http','$q', function ($http,$q) {
this.uploadFileToUrl = function (fileData, uploadUrl) {
if (fileData.size > 50000000) {
var fd = new FormData();
fd.append('file', fileData);
var deferred = $q.defer();
$http.post(uploadUrl, fd, {
transformRequest: angular.identity,
headers: { 'Content-Type': undefined }
})
.then(function (result) {
deffered.resolve(result);
},function(error) {
deffered.reject();
});
return deferred.promise;
}
else {
return "Image size is more than 5MB";
}
}
}]);
有关更多信息,请查看以下链接-
$q
使用
回调
,因为这是异步操作…您可以编写解决方案plz吗