我从Visual Studio中的Angular2组件服务调用Web API,但我不断收到错误"意外令牌<在JSON的位置0,在JSON.parse()"。
ComponentService:
import { Injectable } from '@angular/core';
import {Http, Response } from '@angular/http';
import { IData } from '../Common/details';
import { Observable } from 'rxjs/Observable';
import 'rxjs/add/operator/map';
@Injectable()
export class AniversaryService {
constructor(private _http:Http) { }
getImages(): Observable<IData[]> {
return this._http.get("/api/ImageService/Details")
.map((response: Response) => <IData[]>response.json()
};
}
和相应的组件是:
import { Component, OnInit } from '@angular/core';
import { DomSanitizer } from '@angular/platform-browser';
import { IData } from '../Common/details';
import { AniversaryService } from './Aniversary.service';
@Component({
selector: 'my-AniversaryComponent',
providers: [AniversaryService]
})
export class AniversaryComponent implements OnInit {
data: IData[];
constructor(private _aniversaryservice: AniversaryService) { }
ngOnInit() {
this._aniversaryservice.getImages().subscribe((details) => this.data
=details);
}
}
}
这些是网络标题和我的响应的图像(响应是在Javascript中):
有时我的状态代码显示200 ok和内容类型(在响应标题中):application / javascript
请帮我解决这个问题。
感谢您的帮助
答案 0 :(得分:1)
标题没有用,数据也是如此。但错误信息很明确:您认为应该是JSON,以&#34;&lt;&#34;作为第一个角色,JSON并没有以&#34;&lt;&#34;开头。很可能你收到的是html或xml。
答案 1 :(得分:0)
-I重新创建了我的组件服务
import { Injectable } from '@angular/core';
import { HttpClient, HttpErrorResponse } from '@angular/common/http';
import { Observable } from 'rxjs/Observable';
import 'rxjs/add/observable/throw';
import 'rxjs/add/operator/catch';
import 'rxjs/add/operator/do';
import { IDetails } from '../share/Details';
@Injectable()
export class AniversaryService {
private url = 'http://localhost:60975/api/ImageService';
constructor(private _http: HttpClient) { }
getDetails(): Observable<IDetails[]> {
return this._http.get<IDetails[]>(this.url)
.do(data => console.log(JSON.stringify(data)))
.catch(this.handleError);
}
private handleError(err: HttpErrorResponse) {
console.log(err.message);
return Observable.throw(err.message);
}
}
现在它正在接受数据而没有任何错误。