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
上传文件
<input type="file" name="resume" onchange="angular.element(this).scope().uploadResume()" ng-model="fileupload" id="resume" />
$scope.uploadResume = function () {
var f = document.getElementById('resume').files[0];
$scope.selectedResumeName = f.name;
$scope.selectedResumeType = f.type;
r = new FileReader();
r.onloadend = function (e) {
$scope.data = e.target.result;
}
r.readAsDataURL(f);
};
下载文件:
<a href="{{applicant.resume}}" download> download resume</a>
var app = angular.module("myApp", []);
app.config(['$compileProvider', function ($compileProvider) {
$compileProvider.aHrefSanitizationWhitelist(/^\s*(https?|local|data|chrome-extension):/);
$compileProvider.imgSrcSanitizationWhitelist(/^\s*(https?|local|data|chrome-extension):/);
}]);
其他回答
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。
你可以使用flow.js实现良好的文件和文件夹上传。
https://github.com/flowjs/ng-flow
点击这里查看演示
http://flowjs.github.io/ng-flow/
它不支持IE7, IE8, IE9，所以你最终必须使用兼容层
https://github.com/flowjs/fusty-flow.js
简单地说
在Html中-只添加以下代码
<form name="upload" class="form" data-ng-submit="addFile()">
<input type="file" name="file" multiple
onchange="angular.element(this).scope().uploadedFile(this)" />
<button type="submit">Upload </button>
</form>
当你点击“上传文件按钮”时，这个函数被调用。它将上传文件。你可以安慰它。
$scope.uploadedFile = function(element) {
$scope.$apply(function($scope) {
$scope.files = element.files;
});
}
在控制器中添加更多-以下代码添加到函数中。这个函数在你点击按钮时被调用，这个按钮被用来“命中api (POST)”。它将发送文件(上传)和表单数据到后端。
var url = httpURL + "/reporttojson"
var files=$scope.files;
for ( var i = 0; i < files.length; i++)
{
var fd = new FormData();
angular.forEach(files,function(file){
fd.append('file',file);
});
var data ={
msg : message,
sub : sub,
sendMail: sendMail,
selectUsersAcknowledge:false
};
fd.append("data", JSON.stringify(data));
$http.post(url, fd, {
withCredentials : false,
headers : {
'Content-Type' : undefined
},
transformRequest : angular.identity
}).success(function(data)
{
toastr.success("Notification sent successfully","",{timeOut: 2000});
$scope.removereport()
$timeout(function() {
location.reload();
}, 1000);
}).error(function(data)
{
toastr.success("Error in Sending Notification","",{timeOut: 2000});
$scope.removereport()
});
}
在这种情况下…我添加了下面的代码作为表单数据
var data ={
msg : message,
sub : sub,
sendMail: sendMail,
selectUsersAcknowledge:false
};
我们使用了HTML, CSS和AngularJS。下面的例子展示了如何使用AngularJS上传文件。
<html>
<head>
<script src = "https://ajax.googleapis.com/ajax/libs/angularjs/1.3.14/angular.min.js"></script>
</head>
<body ng-app = "myApp">
<div ng-controller = "myCtrl">
<input type = "file" file-model = "myFile"/>
<button ng-click = "uploadFile()">upload me</button>
</div>
<script>
var myApp = angular.module('myApp', []);
myApp.directive('fileModel', ['$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]);
});
});
}
};
}]);
myApp.service('fileUpload', ['$http', function ($http) {
this.uploadFileToUrl = function(file, uploadUrl){
var fd = new FormData();
fd.append('file', file);
$http.post(uploadUrl, fd, {
transformRequest: angular.identity,
headers: {'Content-Type': undefined}
})
.success(function(){
})
.error(function(){
});
}
}]);
myApp.controller('myCtrl', ['$scope', 'fileUpload', function($scope, fileUpload){
$scope.uploadFile = function(){
var file = $scope.myFile;
console.log('file is ' );
console.dir(file);
var uploadUrl = "/fileUpload";
fileUpload.uploadFileToUrl(file, uploadUrl);
};
}]);
</script>
</body>
</html>
app.directive('ngUpload', function () {
return {
restrict: 'A',
link: function (scope, element, attrs) {
var options = {};
options.enableControls = attrs['uploadOptionsEnableControls'];
// get scope function to execute on successful form upload
if (attrs['ngUpload']) {
element.attr("target", "upload_iframe");
element.attr("method", "post");
// Append a timestamp field to the url to prevent browser caching results
element.attr("action", element.attr("action") + "?_t=" + new Date().getTime());
element.attr("enctype", "multipart/form-data");
element.attr("encoding", "multipart/form-data");
// Retrieve the callback function
var fn = attrs['ngUpload'].split('(')[0];
var callbackFn = scope.$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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