uploadConfigFiles(event){
let url = "*******/uploadRawFile.do";
console.log("File selected");
    // let inputEl = this.el.nativeElement.firstElementChild;
 let fileLocInput = event.target;
    if (fileLocInput.files.length > 0) { // a file was selected
        let file:File = fileLocInput.files[0];

 let  formData:FormData = new FormData();
 formData.append("rawFile",file,file.name);
 formData.append("locationFile",file,file.name);
  let  xhr: XMLHttpRequest = new XMLHttpRequest();


      xhr.onreadystatechange = () => {
        if (xhr.readyState === 4) {
            if (xhr.status === 200) {
                alert("success");
            } else {
               alert("fail");
            }
        }
    };


 xhr.open('POST', url, true);
        xhr.send(formData);
/*
let headers      = new Headers({ 'Content-Type': 'multipart/form-data;boundary=HereGoes' }); // ... Set content type to JSON
    let options       = new RequestOptions({ headers: headers }); // Create a request option
        this.http
            .post(url,formData,options)
            .map(res => res.json())
            .catch(error => Observable.throw(error))
        .subscribe(
            data => console.log('success'),
            error => console.log(error)
        )
            // do whatever you do...
            // subscribe to observable to listen for response

            */
    }
  }