Question

我正在学习使用rxjs中的Subject将字符串发送到后端。我从前端管理字符串，它会打印期望的字符串。当我查看net core2.1时，它以null而不是字符串形式发送。

这是googlechrome开发人员窗口“ 2：65418 / api / stock：1 POST http://localhost:65418/api/stock 500（内部服务器错误）”中的错误

这是stock.component.ts文件中的组件代码：

    post(stock){
     this.api.postStock(stock);
     console.log("this is the stock I posted", stock);
}

这是api服务ts代码：

import { Injectable } from '@angular/core'
import { HttpClient, HttpHeaders } from '@angular/common/http'
import { Subject} from 'rxjs'

import { Cagr } from '../_models/cagr'
import { environment } from '../environments/environment'

const headers = new HttpHeaders({'Content-Type':'application/json; charset=utf-8'});
@Injectable({
  providedIn: 'root'
})

export class ApiService {

  apiURL = environment.apiUrl;
  stockUrl = this.apiURL + '/api/stock';

  private icarg = new Subject<Cagr[]>();
  Icagr$ = this.icarg.asObservable();

  constructor(private http: HttpClient) { }

  postStock (stocks) {
    this.http.post(this.stockUrl, stocks, {headers: 
headers}).subscribe(res => {

  console.log("POST call successful value returned in body", res);
},
response => {
  console.log("POST call in error", response);

  })
  }

这是组件html代码：

<mat-card>
    <mat-card-content>
        <form class="example-form">
        <mat-form-field >
          <input [(ngModel)]="stock" name = "stock" matInput placeholder="Input stock symbol" >
        </mat-form-field>
      </form>
    </mat-card-content>
    <mat-card-actions>
        <button (click)="post(stock)" mat-raised-button color="primary">Go</button>
        <div>

这是我希望在其中看到字符串的后端区域，但为空：

[HttpPost]
    public async Task<IActionResult> Post([FromBody]Models.Stock stock)
    {
        _context.Stocks.Add(stock);
        await _context.SaveChangesAsync();
        return Ok(stock);
    }

Answer 1

首先，您是否使用邮递员/提琴手/挥舞者之类的任何工具测试了api。因为据我所知，内部服务器错误来自您的api。

使用角度主题的内部500错误

1 个答案: