'Content-Type','multipart/form-data' send null values

[khalilben]

Hello,

I have a page that contains both text and picture

And when i want to POST all the data, it send only NULL Values.

MY POST CODE :

 declarerSinistre(){
    //http://michael.laffargue.fr/blog/2016/04/17/angularjs2-send-http-post-request-with-parameters-to-php/
    var headers = new Headers();
    headers.append('Content-Type','multipart/form-data');

    var params = '&entry_by='+this.userDetails.id+'&NomConducteur='+this.userData.NomConducteur+'&TelConducteur='+this.userData.TelConducteur+'&CinConducteur='+this.userData.CinConducteur+'&latitude='+this.la+'&longitude='+this.lo+'&justif1='+this.imageUpload;
    this.http.post(this.apiSinistre, params , {headers: headers})
      .subscribe(
        data => this.afficherAlert('Réussite','Sinistre Déclaré'),
        err => this.afficherAlert('Erreur','Sinistre Non Déclaré')
      );
  }

AND THE PICTURE PART

/*PARTIE PHOTO DEBUT*/
  ngOnInit() {
    this.photos = [];
  }
  deletePhoto(index) {
    let confirm = this.alertCtrl.create({
      title: "Est-ce que vous êtes sûr ?",
      message: "",
      buttons: [
        {
          text: "Non",
          handler: () => {
            console.log("Disagree clicked");
          }
        },
        {
          text: "Oui",
          handler: () => {
            console.log("Agree clicked");
            this.photos.splice(index, 1);
          }
        }
      ]
    });
    confirm.present();
  }

  takePhoto() {
    //console.log("coming here");

    const options: CameraOptions = {
      quality: 50,
      destinationType: this.camera.DestinationType.DATA_URL,
      encodingType: this.camera.EncodingType.JPEG,
      mediaType: this.camera.MediaType.PICTURE
    };

    this.camera.getPicture(options).then(
      imageData => {
        this.base64Image = "data:image/jpeg;base64," + imageData;
        this.photos.push(this.base64Image);
        this.photos.reverse();
        this.imageUpload=imageData;
      },
      err => {
        console.log(err);
      }
    );
  }
  /*PARTIE PHOTO FIN*/

When i don’t send picture, all the others informations are sent without problem. Only when i add picture that i have this problem…

Any help ??