繁体   English   中英

无法在角度7中使用FormData使用Ajax发送文件

[英]Can not send a file with Ajax using FormData in angular 7

我使用ASP.NET Core作为后端,并且尝试使用angular 7中的ajax发送文件。我创建了FormData类的对象,并使用append方法将文件添加到了该对象。 但是尝试在api上方发布时会出现错误:

Error: {"headers":{"normalizedNames":{},"lazyUpdate":null},"status":415,"statusText":"Unsupported Media Type","url":"https://localhost:44319/Api/TimeLinePost","ok":false,"name":"HttpErrorResponse","message":"Http failure response for https://localhost:44319/Api/TimeLinePost: 415 Unsupported Media Type","error":{"type":"https://tools.ietf.org/html/rfc7231#section-6.5.13","title":"Unsupported Media Type","status":415,"traceId":"0HLLKF4AT3QD7:00000005"}}

这是我的角度代码:

export class StatusComponent {
  selectedImage: File = null;
  constructor(private http: HttpClient, @Inject('BASE_URL') private baseUrl: string) {

  }
  onImageSelected(event) {
    this.selectedImage = <File>event.target.files[0];
  }
  update() {
    const fd = new FormData();
    fd.append('image', this.selectedImage, this.selectedImage.name);
    this.http.post<boolean>(this.baseUrl + 'Api/TimeLinePost', fd).subscribe(
      result => {
      },
      error => {
        alert('Ops! Somthing went wrong!');
        console.log(`Error: ${JSON.stringify(error)}`)
      }
    )
  }
}

这是我的api:

[HttpPost]
public bool Post(IFormFile image)
{ 
    return true;
}

它可以通过两种方式解决。

1)将[FromForm]属性添加到操作参数(如在此问题中回答 ):

[HttpPost]
public bool Post([FromForm] IFormFile image)
{ 
    return true;
}

2)在配置中添加SetCompatibilityVersion(CompatibilityVersion.Version_2_2) 它将自动解决绑定问题:

public void ConfigureServices(IServiceCollection services)
{
   services.AddMvc().SetCompatibilityVersion(CompatibilityVersion.Version_2_2);
}

暂无
暂无

声明:本站的技术帖子网页,遵循CC BY-SA 4.0协议,如果您需要转载,请注明本站网址或者原文地址。任何问题请咨询:yoyou2525@163.com.

 
粤ICP备18138465号  © 2020-2024 STACKOOM.COM