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注意：我已经使用上面的代码上传了 CSV 文件并读取并验证了数据，但我无法将这些记录保存到数据库中。任何人都可以帮助我将数据从我的 service.ts 传递到 webpapi 控制器的操作方法。

波纹管代码是用于 csv 文件上传的 html 代码 -

 <td><input type="file" name="File Upload" id="txtFileUpload" 
                (change)="changeListener($event.target.files)" 
                accept=".csv"/></td>
                <td> <button class="btn btn1 btn2" color="primary" mat-raised-button *ngIf="isUploadFile" (click)="uploadCSVFile($event)">
                 UploadFile
               </button></td>

Bellow code is Component.ts code -
  uploadCSVFile($event) { 
        event.preventDefault();  
        alert('upload'); 
        let businessAccountData = this.csvRecords;
        let merchantdata: UserMerchantData = this.commonfunction.getUserMerchantData();
    let email = this.commonfunction.getEmail();
    // let userName = this.commonfunction.getUserName();
    //  for(let i =1; i<= businessAccountData.length;i++)
    //  {
    //   businessAccountData[i].UserName =userName;
    //   businessAccountData[i].MerchantKeyId =merchantdata.MerchantKeyId;
    //  }


        this.service.addOnBusinessAccountData(businessAccountData,email).subscribe(result => {
          console.log(' result - ', result);

          if (result != null) {
            //this.router.navigate(['/home/addonBusiness/manage-business-accounts']);
          }
        });

      }
below code is service.ts file - 
**strong text**
 addOnBusinessAccountData(data,email)
  {
    alert('service');
  //  alert(JSON.stringify(data));
  alert(data);
    return this.service.create(environment.createBusinessAccountDataUrl+"?email="+email, data);
  }

below code is for webapi controller's action method - 
 [HttpPost]
        public IHttpActionResult AddAccountData(AddOnAccountData[] addOnAccountData, string email)
        {
            try
            {
                _apiConnectivity = new VposApiConnnectivity(email);
                var businessAccountResponse = _apiConnectivity.AddAccountData(addOnAccountData);
                return Json(businessAccountResponse);
            }
            catch (Exception e)
            {
                return Ok("");
            }
        }
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