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
你可以使用一个安全快速的FormData对象:
// Store the file object when input field is changed
$scope.contentChanged = function(event){
if (!event.files.length)
return null;
$scope.content = new FormData();
$scope.content.append('fileUpload', event.files[0]);
$scope.$apply();
}
// Upload the file over HTTP
$scope.upload = function(){
$http({
method: 'POST',
url: '/remote/url',
headers: {'Content-Type': undefined },
data: $scope.content,
}).success(function(response) {
// Uploading complete
console.log('Request finished', response);
});
}
其他回答
这是
file.html
<html>
<head>
<script src = "https://ajax.googleapis.com/ajax/libs/angularjs/1.3.14/angular.min.js"></script>
</head>
<body ng-app = "app">
<div ng-controller = "myCtrl">
<input type = "file" file-model = "myFile"/>
<button ng-click = "uploadFile()">upload me</button>
</div>
</body>
<script src="controller.js"></script>
</html>
controller.js
var app = angular.module('app', []);
app.service('fileUpload', ['$http', function ($http) {
this.uploadFileToUrl = function(file, uploadUrl){
var fd = new FormData();
fd.append('file', file);
$http.post(uploadUrl, fd, {
transformRequest: angular.identity,
headers: {'Content-Type': undefined}
}).success(function(res){
console.log(res);
}).error(function(error){
console.log(error);
});
}
}]);
app.controller('fileCtrl', ['$scope', 'fileUpload', function($scope, fileUpload){
$scope.uploadFile = function(){
var file = $scope.myFile;
console.log('file is ' );
console.dir(file);
var uploadUrl = "/fileUpload.php"; // upload url stands for api endpoint to handle upload to directory
fileUpload.uploadFileToUrl(file, uploadUrl);
};
}]);
</script>
fileupload.php
<?php
$ext = pathinfo($_FILES['file']['name'],PATHINFO_EXTENSION);
$image = time().'.'.$ext;
move_uploaded_file($_FILES["file"]["tmp_name"],__DIR__. ' \\'.$image);
?>
http://jsfiddle.net/vishalvasani/4hqVu/在chrome和IE中运行良好(如果你在background-image中稍微更新CSS)。 用于更新进度条:
scope.progress = Math.round(evt.loaded * 100 / evt.total)
但是在FireFox中，angular的[percent]数据没有在DOM中成功更新，尽管文件上传成功。
该代码将帮助插入文件
<body ng-app = "myApp">
<form ng-controller="insert_Ctrl" method="post" action="" name="myForm" enctype="multipart/form-data" novalidate>
<div>
<p><input type="file" ng-model="myFile" class="form-control" onchange="angular.element(this).scope().uploadedFile(this)">
<span style="color:red" ng-show="(myForm.myFile.$error.required&&myForm.myFile.$touched)">Select Picture</span>
</p>
</div>
<div>
<input type="button" name="submit" ng-click="uploadFile()" class="btn-primary" ng-disabled="myForm.myFile.$invalid" value="insert">
</div>
</form>
<script src="http://ajax.googleapis.com/ajax/libs/angularjs/1.4.8/angular.min.js"></script>
<script src="insert.js"></script>
</body>
insert.js
var app = angular.module('myApp',[]);
app.service('uploadFile', ['$http','$window', function ($http,$window) {
this.uploadFiletoServer = function(file,uploadUrl){
var fd = new FormData();
fd.append('file', file);
$http.post(uploadUrl, fd, {
transformRequest: angular.identity,
headers: {'Content-Type': undefined}
})
.success(function(data){
alert("insert successfull");
$window.location.href = ' ';//your window location
})
.error(function(){
alert("Error");
});
}
}]);
app.controller('insert_Ctrl', ['$scope', 'uploadFile', function($scope, uploadFile){
$scope.uploadFile = function() {
$scope.myFile = $scope.files[0];
var file = $scope.myFile;
var url = "save_data.php";
uploadFile.uploadFiletoServer(file,url);
};
$scope.uploadedFile = function(element) {
var reader = new FileReader();
reader.onload = function(event) {
$scope.$apply(function($scope) {
$scope.files = element.files;
$scope.src = event.target.result
});
}
reader.readAsDataURL(element.files[0]);
}
}]);
save_data.php
<?php
require "dbconnection.php";
$ext = pathinfo($_FILES['file']['name'],PATHINFO_EXTENSION);
$image = time().'.'.$ext;
move_uploaded_file($_FILES["file"]["tmp_name"],"upload/".$image);
$query="insert into test_table values ('null','$image')";
mysqli_query($con,$query);
?>
<input type=file>元素默认不使用ng-model指令。它需要一个自定义指令:
使用ng-model1的select-ng-files指令的工作演示
angular.module("app",[]); angular.module("app").directive("selectNgFiles", function() { return { require: "ngModel", link: function postLink(scope,elem,attrs,ngModel) { elem.on("change", function(e) { var files = elem[0].files; ngModel.$setViewValue(files); }) } } }); <script src="//unpkg.com/angular/angular.js"></script> <body ng-app="app"> <h1>AngularJS Input `type=file` Demo</h1> <input type="file" select-ng-files ng-model="fileList" multiple> <h2>Files</h2> <div ng-repeat="file in fileList"> {{file.name}} </div> </body>
美元http。从FileList中post
$scope.upload = function(url, fileList) {
var config = { headers: { 'Content-Type': undefined },
transformResponse: angular.identity
};
var promises = fileList.map(function(file) {
return $http.post(url, file, config);
});
return $q.all(promises);
};
当发送带有File对象的POST时，重要的是设置'Content-Type': undefined。然后XHR发送方法将检测File对象并自动设置内容类型。
app.directive('ngUpload', function () {
return {
restrict: 'A',
link: function (scope, element, attrs) {
var options = {};
options.enableControls = attrs['uploadOptionsEnableControls'];
// get scope function to execute on successful form upload
if (attrs['ngUpload']) {
element.attr("target", "upload_iframe");
element.attr("method", "post");
// Append a timestamp field to the url to prevent browser caching results
element.attr("action", element.attr("action") + "?_t=" + new Date().getTime());
element.attr("enctype", "multipart/form-data");
element.attr("encoding", "multipart/form-data");
// Retrieve the callback function
var fn = attrs['ngUpload'].split('(')[0];
var callbackFn = scope.$eval(fn);
if (callbackFn == null || callbackFn == undefined || !angular.isFunction(callbackFn))
{
var message = "The expression on the ngUpload directive does not point to a valid function.";
// console.error(message);
throw message + "\n";
}
// Helper function to create new i frame for each form submission
var addNewDisposableIframe = function (submitControl) {
// create a new iframe
var iframe = $("<iframe id='upload_iframe' name='upload_iframe' border='0' width='0' height='0' style='width: 0px; height: 0px;
border: none; display: none' />");
// attach function to load event of the iframe
iframe.bind('load', function () {
// get content - requires jQuery
var content = iframe.contents().find('body').text();
// execute the upload response function in the active scope
scope.$apply(function () { callbackFn(content, content !== "" /* upload completed */); });
// remove iframe
if (content != "") // Fixes a bug in Google Chrome that dispose the iframe before content is ready.
setTimeout(function () { iframe.remove(); }, 250);
submitControl.attr('disabled', null);
submitControl.attr('title', 'Click to start upload.');
});
// add the new iframe to application
element.parent().append(iframe);
};
// 1) get the upload submit control(s) on the form (submitters must be decorated with the 'ng-upload-submit' class)
// 2) attach a handler to the controls' click event
$('.upload-submit', element).click(
function () {
addNewDisposableIframe($(this) /* pass the submit control */);
scope.$apply(function () { callbackFn("Please wait...", false /* upload not completed */); });
var enabled = true;
if (options.enableControls === null || options.enableControls === undefined || options.enableControls.length >= 0) {
// disable the submit control on click
$(this).attr('disabled', 'disabled');
enabled = false;
}
$(this).attr('title', (enabled ? '[ENABLED]: ' : '[DISABLED]: ') + 'Uploading, please wait...');
// submit the form
$(element).submit();
}
).attr('title', 'Click to start upload.');
}
else
alert("No callback function found on the ngUpload directive.");
}
};
});
<form class="form form-inline" name="uploadForm" id="uploadForm"
ng-upload="uploadForm12" action="rest/uploadHelpFile" method="post"
enctype="multipart/form-data" style="margin-top: 3px;margin-left:
6px"> <button type="submit" id="mbUploadBtn" class="upload-submit"
ng-hide="true"></button> </form>
@RequestMapping(value = "/uploadHelpFile", method =
RequestMethod.POST) public @ResponseBody String
uploadHelpFile(@RequestParam(value = "file") CommonsMultipartFile[]
file,@RequestParam(value = "fileName") String
fileName,@RequestParam(value = "helpFileType") String
helpFileType,@RequestParam(value = "helpFileName") String
helpFileName) { }
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