Using the new Angular 4.3 HttpClient, how can I upload and access files in an ASP.NET Core 2.0 Controller while reporting upload progress to the client?
asked Sep 13, 2017 at 20:51
Matthew Steven Monkan
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2 Answers
Here is a working example to get started:
HTML
<input #file type="file" multiple (change)="upload(file.files)" />
<span *ngIf="uploadProgress > 0 && uploadProgress < 100">
{{uploadProgress}}%
</span>
TypeScript
import { Component } from '@angular/core';
import { HttpClient, HttpRequest, HttpEventType, HttpResponse } from '@angular/common/http'
@Component({
selector: 'files',
templateUrl: './files.component.html',
})
export class FilesComponent {
public uploadProgress: number;
constructor(private http: HttpClient) { }
upload(files) {
if (files.length === 0)
return;
const formData = new FormData();
for (let file of files)
formData.append(file.name, file);
const req = new HttpRequest('POST', `api/files`, formData, {
reportProgress: true,
});
this.http.request(req).subscribe(event => {
if (event.type === HttpEventType.UploadProgress)
this.uploadProgress = Math.round(100 * event.loaded / event.total);
else if (event instanceof HttpResponse)
console.log('Files uploaded!');
});
}
}
Controller
[HttpPost, DisableRequestSizeLimit, Route("api/files")]
public async Task UploadFiles()
{
var files = Request.Form.Files; // now you have them
}
answered Sep 13, 2017 at 20:51
Matthew Steven Monkan
9,2406 gold badges56 silver badges74 bronze badges
2 Comments
Jason Foglia
I was almost done with my own solution and got stuck, replaced with this awesomeness. Thank you
Isuru
I can not find @angular/common/http
You could use the interface Microsoft.AspNetCore.Http.IFormFile that represents a file sent with the HttpRequest to simplify the access to file.
[HttpPost, DisableRequestSizeLimit, Route("api/files")]
public async Task UploadFiles(IFormFile file){
//your file stream
var stream = file.OpenReadStream();
}
