使用角度 4 获取二进制数据（xls、pdfs、csvs）

Question

我正在尝试应用此解决方案：How to download excel/Zip files in Angular 4 但我遇到了一些错误。

我的服务代码是这样的：

    return this.http.post(endpoint, 
                          body, 
                         {headers: new HttpHeaders({'Accept':'application/vnd.ms-excel'}) , 
                          responseType: ResponseContentType.Blob})
                     .map(res => res.blob());

但我收到此错误：

Argument of type '{ headers: HttpHeaders; responseType: ResponseContentType.Blob; }' is not assignable to parameter of type '{ headers?: HttpHeaders; observe?: "body"; params?: HttpParams; reportProgress?: boolean; respons...'.

Types of property 'responseType' are incompatible.
Type 'ResponseContentType.Blob' is not assignable to type '"json"'.

我不知道该怎么办：\

Answer 1

制作 responseType:"blob" 解决了我的问题！

return this.http.post(endpoint, body, {responseType: "blob"}).map(res => res).catch(this.handleError);