对于那些使用Redux模式

我在文件保存器中添加了@Hector Cuevas的名字，在他的回答中。使用Angular2 v. 2.3.1，我不需要添加@types/file-saver。

以PDF格式下载日志为例。

日记账操作

public static DOWNLOAD_JOURNALS = '[Journals] Download as PDF';
public downloadJournals(referenceId: string): Action {
 return {
   type: JournalActions.DOWNLOAD_JOURNALS,
   payload: { referenceId: referenceId }
 };
}

public static DOWNLOAD_JOURNALS_SUCCESS = '[Journals] Download as PDF Success';
public downloadJournalsSuccess(blob: Blob): Action {
 return {
   type: JournalActions.DOWNLOAD_JOURNALS_SUCCESS,
   payload: { blob: blob }
 };
}

期刊效应

@Effect() download$ = this.actions$
    .ofType(JournalActions.DOWNLOAD_JOURNALS)
    .switchMap(({payload}) =>
        this._journalApiService.downloadJournal(payload.referenceId)
        .map((blob) => this._actions.downloadJournalsSuccess(blob))
        .catch((err) => handleError(err, this._actions.downloadJournalsFail(err)))
    );

@Effect() downloadJournalSuccess$ = this.actions$
    .ofType(JournalActions.DOWNLOAD_JOURNALS_SUCCESS)
    .map(({payload}) => saveBlobAs(payload.blob, 'journal.pdf'))

期刊服务

public downloadJournal(referenceId: string): Observable<any> {
    const url = `${this._config.momentumApi}/api/journals/${referenceId}/download`;
    return this._http.getBlob(url);
}

HTTP服务

public getBlob = (url: string): Observable<any> => {
    return this.request({
        method: RequestMethod.Get,
        url: url,
        responseType: ResponseContentType.Blob
    });
};

轴颈减速器 虽然这只设置了我们应用程序中使用的正确状态，但我仍然想添加它来显示完整的模式。

case JournalActions.DOWNLOAD_JOURNALS: {
  return Object.assign({}, state, <IJournalState>{ downloading: true, hasValidationErrors: false, errors: [] });
}

case JournalActions.DOWNLOAD_JOURNALS_SUCCESS: {
  return Object.assign({}, state, <IJournalState>{ downloading: false, hasValidationErrors: false, errors: [] });
}

我希望这对你有帮助。

下载和显示PDF文件，一个非常相似的代码剪辑如下:

  private downloadFile(data: Response): void {
    let blob = new Blob([data.blob()], { type: "application/pdf" });
    let url = window.URL.createObjectURL(blob);
    window.open(url);
  }

  public showFile(fileEndpointPath: string): void {
    let reqOpt: RequestOptions = this.getAcmOptions();  //  getAcmOptions is our helper method. Change this line according to request headers you need.
    reqOpt.responseType = ResponseContentType.Blob;
    this.http
      .get(fileEndpointPath, reqOpt)
      .subscribe(
        data => this.downloadFile(data),
        error => alert("Error downloading file!"),
        () => console.log("OK!")
      );
  }

定位12 +最高一个网站

您可以从服务器返回一个Blob对象，并创建一个锚标记，并将href属性设置为从Blob创建的对象URL。现在点击锚点将下载文件。您也可以设置文件名。

downloadFile(path: string): Observable<any> {
        return this._httpClient.post(`${environment.ApiRoot}/accountVerification/downloadFile`, { path: path }, {
            observe: 'response',
            responseType: 'blob'
        });
    }

saveFile(path: string, fileName: string): void {
            this._accountApprovalsService.downloadFile(path).pipe(
                take(1)
            ).subscribe((resp) => {
                let downloadLink = document.createElement('a');
                downloadLink.href = window.URL.createObjectURL(resp.body);
                downloadLink.setAttribute('download', fileName);
                document.body.appendChild(downloadLink);
                downloadLink.click();
                downloadLink.remove();
            });
            
        }

后端

[HttpPost]
[Authorize(Roles = "SystemAdmin, SystemUser")]
public async Task<IActionResult> DownloadFile(FilePath model)
{
    if (ModelState.IsValid)
    {
        try
        {
            var fileName = System.IO.Path.GetFileName(model.Path);
            var content = await System.IO.File.ReadAllBytesAsync(model.Path);
            new FileExtensionContentTypeProvider()
                .TryGetContentType(fileName, out string contentType);
            return File(content, contentType, fileName);
        }
        catch
        {
            return BadRequest();
        }
    }

    return BadRequest();

}

<a href=“my_url” 下载=“我的文件名”>下载文件</a>

My_url应该具有相同的原点，否则它将重定向到该位置

我找到了一个从angular 2下载而不会损坏的解决方案， 使用spring MVC和angular 2

我的返回类型是:- responseentity从java结束。这里我发送字节[]数组从控制器返回类型。

第二步-在你的工作空间中包含文件保存器-在索引页中:

<script src="https://cdnjs.cloudflare.com/ajax/libs/FileSaver.js/2014-11-29/FileSaver.min.js"></script>

第3 - at组件ts编写以下代码:

import {ResponseContentType} from '@angular.core';

let headers = new Headers({ 'Content-Type': 'application/json', 'MyApp-Application' : 'AppName', 'Accept': 'application/pdf' });
        let options = new RequestOptions({ headers: headers, responseType: ResponseContentType.Blob });
            this.http
            .post('/project/test/export',
                    somevalue,options)
              .subscribe(data => {

                  var mediaType = 'application/vnd.ms-excel';
                  let blob: Blob = data.blob();
                    window['saveAs'](blob, 'sample.xls');

                });

这将为您提供xls文件格式。如果需要其他格式，请使用正确的扩展名更改介质类型和文件名。

更新Hector的答案使用文件保护程序和HttpClient的第2步:

public downloadFile(file: File): Observable<Blob> {
    return this.http.get(file.fullPath, {responseType: 'blob'})
}