Angular multiple file upload using reactive forms

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I'm trying to upload multiple files in my Angular Application using ngx-material-file-input since my form is made with angular material and it doesn't support input type file by default. I'm using reactive forms but for some reason, the files are not getting uploaded. Check out my code below for further details. Any sort of assistance is appreciated.

What I have tried:

HTML:

<form fxLayout="row wrap" [formGroup]="productForm" (ngSubmit)="onProductSubmit()" enctype="multipart/form-data">
<div fxFlex="100" fxFlex.gt-sm="100" class="px-1" ngClass.sm="mt-1" ngClass.xs="mt-1" method="post">
              <label>Upload Image</label>
              <mat-form-field class="w-100 form-group">
              <ngx-mat-file-input multiple type="file" formControlName="imagePath" name="imagePath" placeholder="PDF file only" (change)="onSelectedFileMultiple($event)" [accept]="'application/x-zip-compressed,image/*'"></ngx-mat-file-input>
              <mat-icon class="btn-project" mat-raised-button color="accent">folder</mat-icon>
            </mat-form-field>
            </div>
<div class="button-wrap" fxFlex="100" fxFlex.gt-sm="100" class="px-1" ngClass.sm="mt-1" ngClass.xs="mt-1">
              <button class="btn-project" mat-raised-button color="accent" type="submit">Post Product</button>
            </div>
          </form>

typescript:

 productForm: FormGroup;
 public imagePath;
constructor(public productService: ProductService, private formBuilder: FormBuilder) { }
  ngOnInit() {

    this.productForm = this.formBuilder.group({
      imagePath: ['']
   })
  }

  public onSelectedFileMultiple(event) {
    if (event.target.files.length > 0) {
      const files = event.target.files;
      this.productForm.get('imagePath').setValue(files);
      console.log(files)
    }
  }
public onProductSubmit(): any {

    const formData = new FormData();
    formData.append('imagePath', this.productForm.get('imagePath').value);

   this.httpClient.post('http://localhost:4000/api/v1' + '/post-product', formData);
           }

Posted 11-Aug-20 23:12pm

Tridib Chatterjee

Updated 13-Aug-20 15:07pm

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Comments

Sandeep Mewara 12-Aug-20 5:19am

If there was an error, it would be helpful.

Tridib Chatterjee 12-Aug-20 6:12am

no error is coming. when logging the data in console, [object FileList] value is shown for imagePath key. But for some reason nothing gets posted

1 solution

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Tridib Chatterjee · Accepted Answer · 2020-08-13T15:07:00

public onSelectedFileMultiple(event) {
  if (event.target.files.length > 0) {
    for (let i = 0; i < event.target.files.length; i++) {
      let file = event.target.files[i]
      this.files.push(file)
      this.productForm.get('imagePath').setValue(this.files[i]);
      console.log(this.files)
    }
  }
}


public onProductSubmit(): any {

  const formData = new FormData();

  this.files.forEach(file => {
    formData.append('imagePath[]', file, file.name);
 })