Angular文件上传

试试这个

安装

npm install primeng --save

进口

import {FileUploadModule} from 'primeng/primeng';

超文本标记语言

<p-fileUpload name="myfile[]" url="./upload.php" multiple="multiple"
accept="image/*" auto="auto"></p-fileUpload>

下面是一个上传文件到api的例子:

步骤1:HTML模板

定义类型为file的简单输入标记。在(change)-event中添加一个处理选择文件的函数。

<div class="form-group">
<label for="file">Choose File</label>
<input type="file"
id="file"
(change)="handleFileInput($event.target.files)">
</div>

步骤2:在TypeScript中处理上传

为所选文件定义一个默认变量。

fileToUpload: File | null = null;

创建你在文件输入标签的(change)-event中使用的函数:

handleFileInput(files: FileList) {
this.fileToUpload = files.item(0);
}

如果你想处理多文件选择，那么你可以遍历这个文件数组。

现在通过调用file-upload.service创建文件上传函数:

uploadFileToActivity() {
this.fileUploadService.postFile(this.fileToUpload).subscribe(data => {
// do something, if upload success
}, error => {
console.log(error);
});
}

第三步:文件上传服务

通过post方法上传文件，你应该使用FormData，因为这样你可以将文件添加到http请求。

postFile(fileToUpload: File): Observable<boolean> {
const endpoint = 'your-destination-url';
const formData: FormData = new FormData();
formData.append('fileKey', fileToUpload, fileToUpload.name);
return this.httpClient
.post(endpoint, formData, { headers: yourHeadersConfig })
.map(() => { return true; })
.catch((e) => this.handleError(e));
}

所以，这是一个非常简单的工作例子，我每天都在工作中使用。

非常简单和最快的方法是使用ng2-file-upload。

通过npm安装ng2-file-upload。npm i ng2-file-upload --save

首先在模块中导入模块。

import { FileUploadModule } from 'ng2-file-upload';


Add it to [imports] under @NgModule:
imports: [ ... FileUploadModule, ... ]

标记:

<input ng2FileSelect type="file" accept=".xml" [uploader]="uploader"/>

在你的组件中:

import { FileUploader } from 'ng2-file-upload';
...
uploader: FileUploader = new FileUploader({ url: "api/your_upload", removeAfterUpload: false, autoUpload: true });

这是最简单的用法。要了解此函数的所有功能，请参阅演示

postFile(fileToUpload: File): Observable<boolean> {
const endpoint = 'your-destination-url';
return this.httpClient
.post(endpoint, fileToUpload, { headers: yourHeadersConfig })
.map(() => { return true; })
.catch((e) => this.handleError(e));
}

下面几行(formData)对我不起作用。

const formData: FormData = new FormData();
formData.append('fileKey', fileToUpload, fileToUpload.name);

https://github.com/amitrke/ngrke/blob/master/src/app/services/fileupload.service.ts

好的，因为这个线程出现在谷歌的第一个结果中，对于其他有同样问题的用户，你不需要像trueboroda指出的那样重新开始，有ng2-file-upload库，它简化了使用angular 6和7上传文件的过程，你所需要做的是:

安装最新的Angular CLI

yarn add global @angular/cli

出于兼容性考虑，请安装rx-compat

npm install rxjs-compat --save

安装ng2-file-upload

npm install ng2-file-upload --save

在你的模块中导入FileSelectDirective指令。

import { FileSelectDirective } from 'ng2-file-upload';


Add it to [declarations] under @NgModule:
declarations: [ ... FileSelectDirective , ... ]

在你的组件中

import { FileUploader } from 'ng2-file-upload/ng2-file-upload';
...


export class AppComponent implements OnInit {


public uploader: FileUploader = new FileUploader({url: URL, itemAlias: 'photo'});
}

模板

<input type="file" name="photo" ng2FileSelect [uploader]="uploader" />

为了更好地理解，你可以检查这个链接: 如何在Angular 6/7中上传文件 < / p >

使用Angular和nodejs上传文件的完整示例(express)

HTML代码

            <div class="form-group">
<label for="file">Choose File</label><br/>
<input type="file" id="file" (change)="uploadFile($event.target.files)" multiple>
</div>

TS组件代码

uploadFile(files) {
console.log('files', files)
var formData = new FormData();


for(let i =0; i < files.length; i++){
formData.append("files", files[i], files[i]['name']);
}


this.httpService.httpPost('/fileUpload', formData)
.subscribe((response) => {
console.log('response', response)
},
(error) => {
console.log('error in fileupload', error)
})
}

Node Js代码

fileUpload API控制器

function start(req, res) {
fileUploadService.fileUpload(req, res)
.then(fileUploadServiceResponse => {
res.status(200).send(fileUploadServiceResponse)
})
.catch(error => {
res.status(400).send(error)
})
}


module.exports.start = start

使用multer上传服务

const multer = require('multer') // import library
const moment = require('moment')
const q = require('q')
const _ = require('underscore')
const fs = require('fs')
const dir = './public'


/** Store file on local folder */
let storage = multer.diskStorage({
destination: function (req, file, cb) {
cb(null, 'public')
},
filename: function (req, file, cb) {
let date = moment(moment.now()).format('YYYYMMDDHHMMSS')
cb(null, date + '_' + file.originalname.replace(/-/g, '_').replace(/ /g,     '_'))
}
})


/** Upload files  */
let upload = multer({ storage: storage }).array('files')


/** Exports fileUpload function */
module.exports = {
fileUpload: function (req, res) {
let deferred = q.defer()


/** Create dir if not exist */
if (!fs.existsSync(dir)) {
fs.mkdirSync(dir)
console.log(`\n\n ${dir} dose not exist, hence created \n\n`)
}


upload(req, res, function (err) {
if (req && (_.isEmpty(req.files))) {
deferred.resolve({ status: 200, message: 'File not attached', data: [] })
} else {
if (err) {
deferred.reject({ status: 400, message: 'error', data: err })
} else {
deferred.resolve({
status: 200,
message: 'File attached',
filename: _.pluck(req.files,
'filename'),
data: req.files
})
}
}
})
return deferred.promise
}
}

通过这种方式，我实现了在项目中上传文件到web API。

我为谁分担关心。

const formData: FormData = new FormData();
formData.append('Image', image, image.name);
formData.append('ComponentId', componentId);
return this.http.post('/api/dashboard/UploadImage', formData);

一步一步

ASP。NET Web API

[HttpPost]
[Route("api/dashboard/UploadImage")]
public HttpResponseMessage UploadImage()
{
string imageName = null;
var httpRequest = HttpContext.Current.Request;
//Upload Image
var postedFile = httpRequest.Files["Image"];
//Create custom filename
if (postedFile != null)
{
imageName = new String(Path.GetFileNameWithoutExtension(postedFile.FileName).Take(10).ToArray()).Replace(" ", "-");
imageName = imageName + DateTime.Now.ToString("yymmssfff") + Path.GetExtension(postedFile.FileName);
var filePath = HttpContext.Current.Server.MapPath("~/Images/" + imageName);
postedFile.SaveAs(filePath);
}
}

HTML表单

<form #imageForm=ngForm (ngSubmit)="OnSubmit(Image)">


<img [src]="imageUrl" class="imgArea">
<div class="image-upload">
<label for="file-input">
<img src="upload.jpg" />
</label>


<input id="file-input" #Image type="file" (change)="handleFileInput($event.target.files)" />
<button type="submit" class="btn-large btn-submit" [disabled]="Image.value=='' || !imageForm.valid"><i
class="material-icons">save</i></button>
</div>
</form>

TS文件使用API

OnSubmit(Image) {
this.dashboardService.uploadImage(this.componentId, this.fileToUpload).subscribe(
data => {
console.log('done');
Image.value = null;
this.imageUrl = "/assets/img/logo.png";
}
);
}

服务TS

uploadImage(componentId, image) {
const formData: FormData = new FormData();
formData.append('Image', image, image.name);
formData.append('ComponentId', componentId);
return this.http.post('/api/dashboard/UploadImage', formData);
}

就我个人而言，我使用ngx-material-file-input作为前端，重火力点作为后端。更准确地说，C用于Firebase的大声存储用于后端与Cloud Firestore结合。下面是一个示例，它限制文件不大于20 MB，并且只接受某些文件扩展名。我还使用云Firestore来存储到上传文件的链接，但你可以跳过这个。

contact.component.html

<mat-form-field>
<!--
Accept only files in the following format: .doc, .docx, .jpg, .jpeg, .pdf, .png, .xls, .xlsx. However, this is easy to bypass, Cloud Storage rules has been set up on the back-end side.
-->
<ngx-mat-file-input
[accept]="[
'.doc',
'.docx',
'.jpg',
'.jpeg',
'.pdf',
'.png',
'.xls',
'.xlsx'
]"
(change)="uploadFile($event)"
formControlName="fileUploader"
multiple
aria-label="Here you can add additional files about your project, which can be helpeful for us."
placeholder="Additional files"
title="Additional files"
type="file"
>
</ngx-mat-file-input>
<mat-icon matSuffix>folder</mat-icon>
<mat-hint
>Accepted formats: DOC, DOCX, JPG, JPEG, PDF, PNG, XLS and XLSX,
maximum files upload size: 20 MB.
</mat-hint>
<!--
Non-null assertion operators are required to let know the compiler that this value is not empty and exists.
-->
<mat-error
*ngIf="contactForm.get('fileUploader')!.hasError('maxContentSize')"
>
This size is too large,
<strong
>maximum acceptable upload size is
\{\{
contactForm.get('fileUploader')?.getError('maxContentSize')
.maxSize | byteFormat
}}</strong
>
(uploaded size:
\{\{
contactForm.get('fileUploader')?.getError('maxContentSize')
.actualSize | byteFormat
}}).
</mat-error>
</mat-form-field>

contact.component.ts(大小验证器部分)

import { FileValidator } from 'ngx-material-file-input';
import { FormBuilder, FormGroup, Validators } from '@angular/forms';


/**
* @constructor
* @description Creates a new instance of this component.
* @param  {formBuilder} - an abstraction class object to create a form group control for the contact form.
*/
constructor(
private angularFirestore: AngularFirestore,
private angularFireStorage: AngularFireStorage,
private formBuilder: FormBuilder
) {}


public maxFileSize = 20971520;
public contactForm: FormGroup = this.formBuilder.group({
fileUploader: [
'',
Validators.compose([
FileValidator.maxContentSize(this.maxFileSize),
Validators.maxLength(512),
Validators.minLength(2)
])
]
})

contact.component.ts(文件上传器部分)

import { AngularFirestore } from '@angular/fire/firestore';
import {
AngularFireStorage,
AngularFireStorageReference,
AngularFireUploadTask
} from '@angular/fire/storage';
import { catchError, finalize } from 'rxjs/operators';
import { throwError } from 'rxjs';


public downloadURL: string[] = [];
/**
* @description Upload additional files to Cloud Firestore and get URL to the files.
* @param {event} - object of sent files.
* @returns {void}
*/
public uploadFile(event: any): void {
// Iterate through all uploaded files.
for (let i = 0; i < event.target.files.length; i++) {
const randomId = Math.random()
.toString(36)
.substring(2); // Create random ID, so the same file names can be uploaded to Cloud Firestore.


const file = event.target.files[i]; // Get each uploaded file.


// Get file reference.
const fileRef: AngularFireStorageReference = this.angularFireStorage.ref(
randomId
);


// Create upload task.
const task: AngularFireUploadTask = this.angularFireStorage.upload(
randomId,
file
);


// Upload file to Cloud Firestore.
task
.snapshotChanges()
.pipe(
finalize(() => {
fileRef.getDownloadURL().subscribe((downloadURL: string) => {
this.angularFirestore
.collection(process.env.FIRESTORE_COLLECTION_FILES!) // Non-null assertion operator is required to let know the compiler that this value is not empty and exists.
.add({ downloadURL: downloadURL });
this.downloadURL.push(downloadURL);
});
}),
catchError((error: any) => {
return throwError(error);
})
)
.subscribe();
}
}

storage.rules

rules_version = '2';
service firebase.storage {
match /b/{bucket}/o {
match /{allPaths=**} {
allow read; // Required in order to send this as attachment.
// Allow write files Firebase Storage, only if:
// 1) File is no more than 20MB
// 2) Content type is in one of the following formats: .doc, .docx, .jpg, .jpeg, .pdf, .png, .xls, .xlsx.
allow write: if request.resource.size <= 20 * 1024 * 1024
&& (request.resource.contentType.matches('application/msword')
|| request.resource.contentType.matches('application/vnd.openxmlformats-officedocument.wordprocessingml.document')
|| request.resource.contentType.matches('image/jpg')
|| request.resource.contentType.matches('image/jpeg')
|| request.resource.contentType.matches('application/pdf')
|| request.resource.contentType.matches('image/png')
|| request.resource.contentType.matches('application/vnd.ms-excel')
|| request.resource.contentType.matches('application/vnd.openxmlformats-officedocument.spreadsheetml.sheet'))
}
}
}

1. 超文本标记语言

<div class="form-group">
<label for="file">Choose File</label><br /> <input type="file" id="file" (change)="uploadFiles($event.target.files)">
</div>


<button type="button" (click)="RequestUpload()">Ok</button>

2. ts文件

public formData = new FormData();
ReqJson: any = {};


uploadFiles( file ) {
console.log( 'file', file )
for ( let i = 0; i < file.length; i++ ) {
this.formData.append( "file", file[i], file[i]['name'] );
}
}


RequestUpload() {
this.ReqJson["patientId"] = "12"
this.ReqJson["requesterName"] = "test1"
this.ReqJson["requestDate"] = "1/1/2019"
this.ReqJson["location"] = "INDIA"
this.formData.append( 'Info', JSON.stringify( this.ReqJson ) )
this.http.post( '/Request', this.formData )
.subscribe(( ) => {
});
}

3. 后端Spring(java文件)

import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;


import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.multipart.MultipartFile;


@Controller
public class Request {
private static String UPLOADED_FOLDER = "c://temp//";


@PostMapping("/Request")
@ResponseBody
public String uploadFile(@RequestParam("file") MultipartFile file, @RequestParam("Info") String Info) {
System.out.println("Json is" + Info);
if (file.isEmpty()) {
return "No file attached";
}
try {
// Get the file and save it somewhere
byte[] bytes = file.getBytes();
Path path = Paths.get(UPLOADED_FOLDER + file.getOriginalFilename());
Files.write(path, bytes);
} catch (IOException e) {
e.printStackTrace();
}
return "Succuss";
}
}

我们必须在C驱动器中创建一个文件夹“temp”，然后这段代码将在控制台中打印Json并将上传的文件保存在创建的文件夹中

在角7/8/9

来源Link . Link . Link

使用引导形式

<form>
<div class="form-group">
<fieldset class="form-group">


<label>Upload Logo</label>
\{\{imageError}}
<div class="custom-file fileInputProfileWrap">
<input type="file" (change)="fileChangeEvent($event)" class="fileInputProfile">
<div class="img-space">


<ng-container *ngIf="isImageSaved; else elseTemplate">
<img [src]="cardImageBase64" />
</ng-container>
<ng-template #elseTemplate>


<img src="./../../assets/placeholder.png" class="img-responsive">
</ng-template>


</div>


</div>
</fieldset>
</div>
<a class="btn btn-danger" (click)="removeImage()" *ngIf="isImageSaved">Remove</a>
</form>

在组件类

fileChangeEvent(fileInput: any) {
this.imageError = null;
if (fileInput.target.files && fileInput.target.files[0]) {
// Size Filter Bytes
const max_size = 20971520;
const allowed_types = ['image/png', 'image/jpeg'];
const max_height = 15200;
const max_width = 25600;


if (fileInput.target.files[0].size > max_size) {
this.imageError =
'Maximum size allowed is ' + max_size / 1000 + 'Mb';


return false;
}


if (!_.includes(allowed_types, fileInput.target.files[0].type)) {
this.imageError = 'Only Images are allowed ( JPG | PNG )';
return false;
}
const reader = new FileReader();
reader.onload = (e: any) => {
const image = new Image();
image.src = e.target.result;
image.onload = rs => {
const img_height = rs.currentTarget['height'];
const img_width = rs.currentTarget['width'];


console.log(img_height, img_width);




if (img_height > max_height && img_width > max_width) {
this.imageError =
'Maximum dimentions allowed ' +
max_height +
'*' +
max_width +
'px';
return false;
} else {
const imgBase64Path = e.target.result;
this.cardImageBase64 = imgBase64Path;
this.isImageSaved = true;
// this.previewImagePath = imgBase64Path;
}
};
};


reader.readAsDataURL(fileInput.target.files[0]);
}
}


removeImage() {
this.cardImageBase64 = null;
this.isImageSaved = false;
}

首先，你需要在你的Angular项目中设置HttpClient。

打开src/app/app.module。导入HttpClientModule并将其添加到模块的imports数组中，如下所示:

import { BrowserModule } from '@angular/platform-browser';
import { NgModule } from '@angular/core';
import { AppRoutingModule } from './app-routing.module';
import { AppComponent } from './app.component';
import { HttpClientModule } from '@angular/common/http';


@NgModule({
declarations: [
AppComponent,
],
imports: [
BrowserModule,
AppRoutingModule,
HttpClientModule
],
providers: [],
bootstrap: [AppComponent]
})
export class AppModule { }

接下来，生成一个组件:

$ ng generate component home

接下来，生成一个上传服务:

$ ng generate service upload

接下来，打开src/app/upload.service。Ts文件如下:

import { HttpClient, HttpEvent, HttpErrorResponse, HttpEventType } from  '@angular/common/http';
import { map } from  'rxjs/operators';


@Injectable({
providedIn: 'root'
})
export class UploadService {
SERVER_URL: string = "https://file.io/";
constructor(private httpClient: HttpClient) { }
public upload(formData) {


return this.httpClient.post<any>(this.SERVER_URL, formData, {
reportProgress: true,
observe: 'events'
});
}
}

接下来，打开src/app/home/home.component.ts文件，开始添加以下导入:

import { Component, OnInit, ViewChild, ElementRef  } from '@angular/core';
import { HttpEventType, HttpErrorResponse } from '@angular/common/http';
import { of } from 'rxjs';
import { catchError, map } from 'rxjs/operators';
import { UploadService } from  '../upload.service';

接下来，定义fileUpload和files变量，并注入UploadService，如下所示:

@Component({
selector: 'app-home',
templateUrl: './home.component.html',
styleUrls: ['./home.component.css']
})
export class HomeComponent implements OnInit {
@ViewChild("fileUpload", {static: false}) fileUpload: ElementRef;files  = [];
constructor(private uploadService: UploadService) { }

接下来，定义uploadFile()方法:

uploadFile(file) {
const formData = new FormData();
formData.append('file', file.data);
file.inProgress = true;
this.uploadService.upload(formData).pipe(
map(event => {
switch (event.type) {
case HttpEventType.UploadProgress:
file.progress = Math.round(event.loaded * 100 / event.total);
break;
case HttpEventType.Response:
return event;
}
}),
catchError((error: HttpErrorResponse) => {
file.inProgress = false;
return of(`${file.data.name} upload failed.`);
})).subscribe((event: any) => {
if (typeof (event) === 'object') {
console.log(event.body);
}
});
}

接下来，定义uploadFiles()方法，该方法可用于上传多个图像文件:

private uploadFiles() {
this.fileUpload.nativeElement.value = '';
this.files.forEach(file => {
this.uploadFile(file);
});
}

接下来，定义onClick()方法:

onClick() {
const fileUpload = this.fileUpload.nativeElement;fileUpload.onchange = () => {
for (let index = 0; index < fileUpload.files.length; index++)
{
const file = fileUpload.files[index];
this.files.push({ data: file, inProgress: false, progress: 0});
}
this.uploadFiles();
};
fileUpload.click();
}

接下来，我们需要创建图像上传UI的HTML模板。打开src/app/home/home.component.html文件，添加以下内容:

<div [ngStyle]="{'text-align':center; 'margin-top': 100px;}">
<button mat-button color="primary" (click)="fileUpload.click()">choose file</button>
<button mat-button color="warn" (click)="onClick()">Upload</button>
<input [hidden]="true" type="file" #fileUpload id="fileUpload" name="fileUpload" multiple="multiple" accept="image/*" />
</div>

看看这个教程和这个帖子

app
|-----uploadcomponent
|-----uploadcomponent.module.ts
|-----uploadcomponent.html
|-----app.module.ts
|-----app.component.ts
|-----app.service.ts

uploadcomponent.html

<div>
<form [formGroup]="form" (ngSubmit)="onSubmit()">
<input type="file" name="profile"  enctype="multipart/form-data" accept=".xlsm,application/msexcel" (change)="onChange($event)" />
<button type="submit">Upload Template</button>
<button id="delete_button" class="delete_button" type="reset"><i class="fa fa-trash"></i></button>
</form>
</div>

uploadcomponent.ts

    import { FormBuilder, FormGroup, ReactiveFormsModule } from '@angular/forms';
import { Component, OnInit } from '@angular/core';
....
export class UploadComponent implements OnInit {
form: FormGroup;
constructor(private formBuilder: FormBuilder, private uploadService: AppService) {}
ngOnInit() {
this.form = this.formBuilder.group({
profile: ['']
});
}


onChange(event) {
if (event.target.files.length > 0) {
const file = event.target.files[0];


this.form.get('profile').setValue(file);
console.log(this.form.get('profile').value)
}
}


onSubmit() {
const formData = new FormData();
formData.append('file', this.form.get('profile').value);


this.uploadService.upload(formData).subscribe(
(res) => {
this.response = res;


console.log(res);


},
(err) => {
console.log(err);
});
}
}

app.service.ts

    upload(formData) {
const endpoint = this.service_url+'upload/';
const httpOptions = headers: new HttpHeaders({    <<<< Changes are here
'Authorization': 'token xxxxxxx'})
};
return this.http.post(endpoint, formData, httpOptions);
}

from __future__ import unicode_literals
from django.db import models
from django.db import connection
from django_mysql.models import JSONField, Model
import uuid
import os




def change_filename(instance, filename):
extension = filename.split('.')[-1]
file_name = os.path.splitext(filename)[0]
uuid_name = uuid.uuid4()
return file_name+"_"+str(uuid_name)+"."+extension


class UploadTemplate (Model):
id = models.AutoField(primary_key=True)
file = models.FileField(blank=False, null=False, upload_to=change_filename)


def __str__(self):
return str(self.file.name)

views.py。

class UploadView(APIView):
serializer_class = UploadSerializer
parser_classes = [MultiPartParser]


def get_queryset(self):
queryset = UploadTemplate.objects.all()
return queryset


def post(self, request, *args, **kwargs):
file_serializer = UploadSerializer(data=request.data)
status = None
message = None
if file_serializer.is_valid():
file_serializer.save()
status = "Success"
message = "Success"
else:
status = "Failure"
message = "Failure!"
content = {'status': status, 'message': message}
return Response(content)

serializers.py。

from uploadtemplate.models import UploadTemplate
from rest_framework import serializers


class UploadSerializer(serializers.ModelSerializer):
class Meta:
model = UploadTemplate
fields = '__all__'

urls . py。

router.register(r'uploadtemplate', uploadtemplateviews.UploadTemplateView,
base_name='UploadTemplate')
urlpatterns = [
....
url(r'upload/', uploadtemplateviews.UploadTemplateView.as_view()),
] + static(settings.STATIC_URL, document_root=settings.STATIC_ROOT)


if settings.DEBUG:
urlpatterns += static(settings.MEDIA_URL, document_root=settings.MEDIA_ROOT)

MEDIA_URL和MEDIA_ROOT在项目的settings.py中定义。

谢谢!

if (request.body instanceof FormData) {
request = request.clone({ headers: request.headers.delete('Content-Type', 'application/json') });
}


if (request.body instanceof FormData) {
request = request.clone({ headers: request.headers.delete('Accept', 'application/json')});
}

create-profile.html

<body>
<h1 class="font-weight-bold" >Create Advertistment</h1>
<hr />
<form [formGroup]="form" (submit)="onSubmit()">
<div>
<label class="font-weight-bold">Insert Subject name</label>
<br>
<input formControlName="name" type="text" placeholder="Enter name..." />
</div>
<div>
<br>
<label class="font-weight-bold">Select the Advertistment</label>
<br>
<input (change)="onFileSelect($event)" type="file" />
</div>
<br>
<!--<div *ngIf="imageData">
<img [src]="imageData" [alt]="form.value.name" />
</div>-->
<div>


<label class="font-weight-bold">Upload the Advertistment</label>
<br>
<button type="submit" class="btn btn-success" >Upload Advertistment</button>
</div>
</form>


</body>

create-profile.ts

import { Component, OnInit } from "@angular/core";
import { FormGroup, FormControl } from "@angular/forms";


import { Profile } from "../../models/Profile";
import { ProfileService } from "src/app/services/profile.service";


@Component({
selector: "app-create-profile",
templateUrl: "./create-profile.component.html",
styleUrls: ["./create-profile.component.css"],
})
export class CreateProfileComponent implements OnInit {
form: FormGroup;
profile: Profile;
imageData: string;


constructor(private profileService: ProfileService) {}


ngOnInit(): void {
this.form = new FormGroup({
name: new FormControl(null),
image: new FormControl(null),
});
}


onFileSelect(event: Event) {
const file = (event.target as HTMLInputElement).files[0];
this.form.patchValue({ image: file });
const allowedMimeTypes = ["image/png", "image/jpeg", "image/jpg"];
if (file && allowedMimeTypes.includes(file.type)) {
const reader = new FileReader();
reader.onload = () => {
this.imageData = reader.result as string;
};
reader.readAsDataURL(file);
}
}


onSubmit() {
this.profileService.addProfile(this.form.value.name, this.form.value.image);
this.form.reset();
this.imageData = null;
}
}

profile.service.ts

import { Injectable } from "@angular/core";
import { HttpClient } from "@angular/common/http";


import { map } from "rxjs/operators";


import { Profile } from "../models/Profile";
import { Subject } from "rxjs";


@Injectable({
providedIn: "root",
})
export class ProfileService {
private profiles: Profile[] = [];
private profiles$ = new Subject<Profile[]>();
readonly url = "http://localhost:3000/api/profiles";


constructor(private http: HttpClient) {}


getProfiles() {
this.http
.get<{ profiles: Profile[] }>(this.url)
.pipe(
map((profileData) => {
return profileData.profiles;
})
)
.subscribe((profiles) => {
this.profiles = profiles;
this.profiles$.next(this.profiles);
});
}


getProfilesStream() {
return this.profiles$.asObservable();
}


addProfile(name: string, image: File): void {
const profileData = new FormData();
profileData.append("name", name);
profileData.append("image", image, name);
this.http
.post<{ profile: Profile }>(this.url, profileData)
.subscribe((profileData) => {
const profile: Profile = {
_id: profileData.profile._id,
name: name,
imagePath: profileData.profile.imagePath,
};
this.profiles.push(profile);
this.profiles$.next(this.profiles);
});
}
}

Profile.ts

export interface Profile {
_id: string;
name: string;
imagePath: string;
}