Access file upload data on ngform submit function in angular 5?

Question

I am having a ngform with file input along with other input fields. Currently I am passing data to the component using ngmodel on submit. But I don't know how to perform the file upload with ngmodel.In the backend I am using Laravel.

Currently I am able to get the file data in the component function handleFileInput.I want to pass this data along with other form input fields.How do I achieve that?

Template code

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

Component code

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

onSubmit Method

onSubmit() {
        this.loading = true;
        this._dataService.create(this.model, company_url).subscribe(data => {
            this.submitted = true;
            this.loading = false;
            this.companyForm.reset();
        },
            error => {
                this.loading = false; console.log(error);
                this.error_message = error;
            });
    }

Kakashi · Accepted Answer · 2019-06-15 18:56:42Z

2

The part you are doing with change detection is right.

Just you will have to create a formdata and submit that formdata with your post request. You dont have to set the content type on your angular side, Angular does that job for you.

I am providing you my angular + node example hope this helps you.

I have used multer in my example to store the file.

Example

Angular component

// Create Variable for your file and formdata.
selectedFile: File = null;
fd = new FormData();

constructor(private http: HttpClient){}

// Once the file change is detected append your file to your formdata and on submit post the request.
handleFileInput(event) {
      this.selectedFile = <File>event.target.files[0];
      this.fd.append('file', this.selectedFile, this.selectedFile.name);
    }

onSubmit() {
    this.http.post(url, this.fd)
    .subscribe((data)=>{console.log(data);});
}

Node route file.

var multer = require("multer");
const storage = multer.diskStorage({
    destination: function (req, file, cb) {
        cb(null, './upload')
    },
    filename: function (req, file, cb) {
        cb(null, file.originalname)
    }
})
const upload = multer({
    storage: storage
});
var fs = require('fs');

router.post('/uploadprofile', auth, upload.single('image'), (req, res) => {
   res.send('file uploaded');
});

edited Jun 15, 2019 at 18:56

Kakashi

3192 silver badges12 bronze badges

answered May 16, 2018 at 6:45

faizan baig

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1 Comment

Harikrishnan Over a year ago

thank you for your response.Currently I am passing data using ngmodel inside onSubmit and my content type is application/json.I have edited the question and added my onSubmit method.please check it.

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