如何限制AngularJS中附件(文件上传)的大小?
我想用AngularJS加载图像来上传文件的最佳方式。同时,我想将大小限制为10MB如何限制AngularJS中附件(文件上传)的大小?,angularjs,angularjs-directive,angularjs-scope,angularjs-ng-repeat,angular-ui,Angularjs,Angularjs Directive,Angularjs Scope,Angularjs Ng Repeat,Angular Ui,我想用AngularJS加载图像来上传文件的最佳方式。同时,我想将大小限制为10MB 请给出实现这一目标的最佳方法?看看这个例子,你会有一些想法 HTML代码: <form class="upload-form"> <input class="upload-file" data-max-size="2048" type="file" > <input type=submit> </form> 虽然这个
请给出实现这一目标的最佳方法?看看这个例子,你会有一些想法 HTML代码:
<form class="upload-form">
<input class="upload-file" data-max-size="2048" type="file" >
<input type=submit>
</form>
虽然这个问题有点老了,但我仍然认为为那些寻求答案的人提供最好的答案是值得的。上面的答案依赖于jQuery的表面特性,但是让我们使用适合角度开发的样式 在这里,当我被问到同样的问题时,我引用了,根据上面问题中所问的尺寸修改它:
uploader = new FileUploader();
//...
uploader.filters.push({
'name': 'enforceMaxFileSize',
'fn': function (item) {
return item.size <= 10485760; // 10 MiB to bytes
}
});
uploader=newfileuploader();
//...
uploader.filters.push({
'name':'enforceMaxFileSize',
“fn”:函数(项){
return item.size您可以使用此库:
这是我用来将文件拉入Angulars范围、验证文件大小和验证扩展名的指令
var fileUpload = () => {
return {
scope: {
file: '='
},
require: 'ngModel',
link(scope, el, attrs, ctrl) {
el.bind('change', (event) => {
var file = event.target.files[0];
var extn = file.name.split(".").pop().toLowerCase();
if (attrs.validExtensions != null) {
const extensions = attrs.validExtensions.split(',');
var validExtension = false;
extensions.forEach((x) => {
if (x === extn) {
validExtension = true;
}
});
ctrl.$setValidity('type', validExtension);
}
if (attrs.maxSize != null) {
var maxSize = attrs.maxSize;
var valid = (file.size / 1024) <= maxSize;
ctrl.$setValidity('size', valid);
} else {
console.log('max size ScriptNotifyEvent set');
}
scope.file = file ? file : undefined;
scope.$apply();
});
}
};
};
var fileUpload=()=>{
返回{
范围:{
文件:'='
},
要求:'ngModel',
链接(范围、el、属性、ctrl){
el.bind('变更',(事件)=>{
var file=event.target.files[0];
var extn=file.name.split(“.”.pop().toLowerCase();
如果(attrs.validExtensions!=null){
const extensions=attrs.validExtensions.split(',');
var validExtension=false;
extensions.forEach((x)=>{
如果(x==extn){
validExtension=true;
}
});
ctrl.$setValidity('type',validExtension);
}
如果(attrs.maxSize!=null){
var maxSize=attrs.maxSize;
var valid=(file.size/1024)使用指令
ngApp.directive('fileModel', ['$parse', function ($parse) {
return {
restrict: 'A',
link: function (scope, element, attrs) {
var model = $parse(attrs.fileModel);
var modelSetter = model.assign;
element.bind('change', function () {
var fileSize = this.files[0].size / 1024;
if (fileSize > 600) {
alert("File size is larze; maximum file size 600 KB");
} else {
scope.$apply(function () {
modelSetter(scope, element[0].files[0]);
});
}
});
}
};
}]);
嗯……仔细想想,上面的例子中的uploader
到底是什么,或者至少你应该在哪里。推过滤器?!@Campbeln很抱歉模糊不清。uploader
是FileUploader
a lauploader=newfileuploader();
。将更新示例。@Campbeln还更新了我的代码示例,以反映对angular file uploadFileUploader\filters
API的更改。
var fileUpload = () => {
return {
scope: {
file: '='
},
require: 'ngModel',
link(scope, el, attrs, ctrl) {
el.bind('change', (event) => {
var file = event.target.files[0];
var extn = file.name.split(".").pop().toLowerCase();
if (attrs.validExtensions != null) {
const extensions = attrs.validExtensions.split(',');
var validExtension = false;
extensions.forEach((x) => {
if (x === extn) {
validExtension = true;
}
});
ctrl.$setValidity('type', validExtension);
}
if (attrs.maxSize != null) {
var maxSize = attrs.maxSize;
var valid = (file.size / 1024) <= maxSize;
ctrl.$setValidity('size', valid);
} else {
console.log('max size ScriptNotifyEvent set');
}
scope.file = file ? file : undefined;
scope.$apply();
});
}
};
};
<input type="file" file="File1" id="File1" name="File1" ng-model="File1" valid-extensions="doc,docx,xls,xlsx,pdf,tiff,zip,ppt,pptx" max-size="20000" />
<div class="alert alert-danger" ng-show="form.File1.$error.type && (form.File1.$touched || Submitted)" Role="alert">This form only allows the following file types: *.doc, *.docx, *.xls, *.xlsx, *.ppt, *.pptx, *.pdf, *.tiff, *.zip</div>
<div class="alert alert-danger" ng-show="form.File1.$error.size && (form.File1.$touched || Submitted)" Role="alert">The file is too large to send to us, please limit indivudual files to 20 megabytes.</div>
ngApp.directive('fileModel', ['$parse', function ($parse) {
return {
restrict: 'A',
link: function (scope, element, attrs) {
var model = $parse(attrs.fileModel);
var modelSetter = model.assign;
element.bind('change', function () {
var fileSize = this.files[0].size / 1024;
if (fileSize > 600) {
alert("File size is larze; maximum file size 600 KB");
} else {
scope.$apply(function () {
modelSetter(scope, element[0].files[0]);
});
}
});
}
};
}]);