C# 下载FileResult不使用Angular

我正在尝试下载文件（pdf、word、excel），它以字节[]的形式保存在DB中，下面是我的代码。但是在调用该方法时出现错误（意外的令牌错误）。 请引导我去修理它

控制器代码：

[HttpPost]
        public async Task<FileResult> AttachmentById([FromBody]ReviewAttachmentModel attachmentRequest)
        {
            ReviewAttachmentModel model = new ReviewAttachmentModel();
            try
            {
                ReviewAttachmentDto reviewAttachmentDto = new ReviewAttachmentDto
                {
                    DocumentKey = attachmentRequest.DocumentKey,
                    ReviewKey = attachmentRequest.ReviewKey,
                    UserId = attachmentRequest.UserId,
                };
                ReviewAttachmentDto _attachmentDto = reviewAttachmentDto;

                string requestBody = JsonConvert.SerializeObject(_attachmentDto);

                //Call API
                string _responseObj = await WebAPIHelper.PostDataToAPI(appSettings.ReviewAttachmentUrl, requestBody, this.loggedinUser.CookieCollection, accessToken);
                model = JsonConvert.DeserializeObject<ReviewAttachmentModel>(_responseObj);

               //  model.Document - byte[]
                return File(model.Document, model.DocumentType, model.DocumentName);

            }
            catch (Exception ex)
            {
                return null;
            }
        }

错误： 更改此选项：

public downloadReviewAttachment(reviewAttachmentModel: any): Observable<any> {
    this._urlSurveillanceDetails = this.baseHref + "/ReviewProfile/AttachmentById";
    const headers: HttpHeaders = new HttpHeaders();
    headers.append('Content-Type', 'application/octet-stream');
    return this.http.post<any>(this._urlSurveillanceDetails, reviewAttachmentModel, { headers: headers });
  }

公共下载ReviewAttachment（reviewAttachmentModel:any）：可观察{
此._urlserviceDetails=this.baseHref+“/ReviewProfile/AttachmentById”；
const headers:HttpHeaders=新的HttpHeaders（）；
headers.append（'Content-Type'，'application/octet-stream'）；
返回this.http.post（this._urlserviveillanceDetails，reviewAttachmentModel，{headers:headers}）；
}

为此：

public downloadReviewAttachment(reviewAttachmentModel: any): Observable<blob> {
        this._urlSurveillanceDetails = this.baseHref + "/ReviewProfile/AttachmentById";
        return this.http.post(this._urlSurveillanceDetails, reviewAttachmentModel, { responseType: 'blob'});
      }

公共下载ReviewAttachment（reviewAttachmentModel:any）：可观察{
此._urlserviceDetails=this.baseHref+“/ReviewProfile/AttachmentById”；
返回this.http.post（this._urlserviveillancedetails，reviewAttachmentModel，{responseType:'blob'}）；
}

---

通过删除泛型参数并添加所需的responseType。Angular知道必须做什么。

检查这是否有帮助@gkulshrestha-感谢它的帮助…通过在标题中添加适当的响应来解决问题。请查看我的答案，我相信它简化了问题code@StPaulis-谢谢，这对我有帮助

public downloadReviewAttachment(reviewAttachmentModel: any): Observable<any> {
    this._urlSurveillanceDetails = this.baseHref + "/ReviewProfile/AttachmentById";
    const headers: HttpHeaders = new HttpHeaders();
    headers.append('Content-Type', 'application/octet-stream');
    return this.http.post<any>(this._urlSurveillanceDetails, reviewAttachmentModel, { headers: headers });
  }

public downloadReviewAttachment(reviewAttachmentModel: any): Observable<blob> {
        this._urlSurveillanceDetails = this.baseHref + "/ReviewProfile/AttachmentById";
        return this.http.post(this._urlSurveillanceDetails, reviewAttachmentModel, { responseType: 'blob'});
      }