Angular6 http post 方法不会将数据传递给 web api

Question

i am not receiving data on asp.net mvc core api from angular 6 app. Image is here MVC core api

httpOptions = {
    headers: new HttpHeaders({
      'Content-Type': 'application/json'
    })
  };  

  createUser(user: User): Observable<any> {;
    let body = JSON.stringify(user);
    return this.http.post<any>('http://localhost:51001/api/User/' + "PostUser", body, this.httpOptions)
      .pipe(catchError(this.handleError));
  }

Answer 1

Don't call JSON.stringify , as the Angular Http / HttpClient class will do this for you. If you do it yourself, Angular will then call stringify on the string, which is causing the problem you're seeing.

  createUser(user: User): Observable<any> {;
    return this.http.post<any>('http://localhost:51001/api/User/' + "PostUser", user, this.httpOptions)
      .pipe(catchError(this.handleError));
  }