Angular 6 CSV下载

时间:2019-04-20 08:52:02

标签: php angular laravel-5 maatwebsite-excel

我是angular的新手,目前我正在一个需要csv导出的项目中工作。在这里,我使用Angular 6作为前端,使用laravel作为后端

这就是我使用mattwebsite / excel编写laravel函数的方式

// Lead export to csv
public function downloadExcel(Request $request)
{
    $credentials = $request->only('token');
    $token = $credentials['token'];
    $userid = $this->getUseridFromToken($token);
    $type = "xls";
    $data = DB::table('user_mailbox AS A')
                    ->select('A.id', 'A.name', 'A.email', 'A.phone', DB::raw('DATE_FORMAT(A.send_on, "%d / %b / %Y") as send_on'), 'B.listing_heading','B.listing_id','B.listing_heading', 'C.name')
                    ->leftjoin('broker_listing AS B', 'B.listing_id', '=', 'A.listing_id')
                    ->leftjoin('users AS C', 'C.id', '=', 'A.sent_by')
                    ->where('A.sent_to', $userid)
                    ->where('A.user_type', '1')
                    ->orderBy('A.id', 'desc')->get()->toArray(); 
    Excel::create('Lead_Export', function($excel) use ($data) {
        $excel->sheet('Lead_Export', function($sheet) use ($data)
        {
            $sheet->fromArray($data);
        });
    })->download($type);
}

这就是我在角度分量中编写函数的方式

    // Download leads as excel
download_excel(){
  const fd = new FormData(); 
  fd.append('token',this.token);
  this.brokerleads.downloadLeads(fd).subscribe(
    data => this.handleResponsedwnload(data),
    error => this.handleErrordwnload(error)
  );
}
handleResponsedwnload(data){ console.log('test');
  const blob = new Blob([data], { type: 'text/xls' });
  const url= window.URL.createObjectURL(blob);
  window.open(url);
}
handleErrordwnload(data){

}

服务就是这样

  // Download as excel
  downloadLeads(data):Observable<any>{
    return this.http.post(`${this.baseUrl}downloadExcel`, data);   
  }

查看

    <a class="export-leads" href="javascript:void(0);" (click)="download_excel()" >EXPORT LEADS</a>

在执行此操作时,我收到这样的响应,但文件未下载 enter image description here

3 个答案:

答案 0 :(得分:2)

您需要使用链接<a href="path" target="_blank">window.open来导航浏览器到后端(在新选项卡中)创建Excel文件的路径

->download()函数设置标题,以便自动下载文件。

通过AJAX调用(HttpClient完成此操作)获取此数据时,您只需获取返回的二进制数据(即在Chrome开发人员工具的“响应”标签中看到的数据)。

有一些前端技巧可以下载ajax检索的文件,例如创建一个link元素并使用JavaScript单击它(请参见下文),但不建议这样做):

let fileName = 'filename.xlsx';
let a = document.createElement('a');

a.href = window.URL.createObjectUrl(responseData);
a.download = fileName;
a.click();

答案 1 :(得分:0)

这也可以使用file-saver完成:

import * as FileSaver from 'file-saver';

this.http.post(`${this.baseUrl}downloadExcel`, data, { responseType: 'blob' })
 .subscribe((resp: any) => {
    saveAs(resp, `filename.csv`)
 });

答案 2 :(得分:0)

此功能对我来说可以导出CSV,

downloadFile(data: any) {
    const replacer = (key, value) => value === null ? '' : value; // specify how you want to handle null values here
    const header = Object.keys(data[0]);
    let csv = data.map(row => header.map(fieldName => JSON.stringify(row[fieldName], replacer)).join(','));
    csv.unshift(header.join(','));
    let csvArray = csv.join('\r\n');

    var a = document.createElement('a');
    var blob = new Blob([csvArray], {type: 'text/csv' }),
    url = window.URL.createObjectURL(blob);

    a.href = url;
    a.download = "myFile.csv";
    a.click();
    window.URL.revokeObjectURL(url);
    a.remove();
}