angular – 无法在服务中正确设置POST的RequestOptionsArgs

我使用角度6,我跟随 this video tutorial提交图像.

我想观察表单提交的进度,这样我就可以得到上传文件的百分比.

我的组件中有这个

import { HttpClient,HttpEventType } from '@angular/common/http';
import { Http,Headers } from '@angular/http';

  constructor(
    private formBuilder: FormBuilder,private myService:MyService,private changeDetector: ChangeDetectorRef,private carouselConfig : NgbCarouselConfig,private http:HttpClient
   ) { }

    let headers = new Headers();    
    headers.append('Authorization',this.token);    
    let eb =null;
    this.http.post('http://localhost:3000/cms/upload',formData,{reportProgress:true,observe:'events'}).subscribe(
      event=>{        
        if(event.type === HttpEventType.UploadProgress){
          let pv = Math.round(event.loaded / event.total *100);
          this.imguploadprogress.nativeElement.value =  pv;          
        }
        else if(event.type === HttpEventType.Response){     
          eb = event.body;              
          if(eb.success){                  
            this.imguploadprogress.nativeElement.value =  100;                                   
            this.imageMsg='All good';                                       
          }
          else{
            this.imguploadprogress.nativeElement.value =  0;
            this.imageMsg='nope;        
          }
        }        
    });

这很好用.

我现在尝试将其分成两部分.将帖子及其标题及其参数转换为我的服务中的函数,只需订阅并获取组件中的结果.我试着这样做：

myapp.component.ts

this.myService.uploadImage(form).subscribe(
  e=>{
    console.log('e- ',e);
  }
);

在我的服务
myapp.service.ts

uploadImage(data) {
    let formData = new FormData(data);
    let headers = new Headers();    
    headers.append('Authorization',this.token);
    return this.http.post('http://localhost:3000/cms/upload',observe:'events',headers:headers});
  }

VScode说类型为{reportProgress：boolean; observe：string; headers：Headers}的参数不能赋予RequestOptionsArgs类型的参数

在编译期间,我得到的对象文字可能只指定已知属性,并且“ReportOroggs”类型中不存在“reportProgress”.当我尝试使用表单时,我只返回最终的响应对象,中间没有事件信息.

那么,我该如何正确设置RequestOptionsArgs呢？

谢谢

我认为你正在混合API,reportProgress是HttpRequest的属性< T>它位于@ angular / common / http中.

在您的示例中,您似乎将服务基于@ angular / http中的HttpModule的Angular 6 Http可注入服务.

>相反,使用来自@ angular / common / http的HttpClient的请求方法.
>另外,请确保使用@ angular / common / http中的HttpHeaders.

以下将有效：

uploadImage(data) {
  let formData = new FormData(data);
  let headers = new HttpHeaders().append('Authorization',this.token);
  return this.httpClient.post(
    'http://localhost:3000/cms/upload',{
      reportProgress: true,observe: 'events',headers: headers
    });
}

当然你必须导入：

import { HttpClient,HttpHeaders } from '@angular/common/http';

并在服务构造函数中注入HttpClient：

constructor(private httpClient: HttpClient) { ... }

我希望这能解释并解决你的问题！

angular – 无法在服务中正确设置POST的RequestOptionsArgs

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