我尝试在表内使用ngmodel数据，但无法正常工作

Question

我的问题需要一些帮助。所以我的问题是我无法将ngmodel放在表中，并且无法对后端进行POST。每次我尝试保存数据时，都会调用ngmodel，但结果为空。

HTML：

<sb-layout-dashboard [title]="'Employee'" [hideBreadcrumbs]="false"
>
<sb-card
    >

    <div class="card-body">
      <div class="btnNav">
        <button class="btn btn-primary float-right "  style="margin-left: 10px;"  (click)="saveThis()">Save Data</button>
        <button class="btn btn-primary float-right" (click)="fileInput.click()">Import Excel</button>
        <input type="file" style="display:none" (change)="onFileSelected($event)" accept=".csv, application/vnd.openxmlformats-officedocument.spreadsheetml.sheet, application/vnd.ms-excel" #fileInput>
      </div>
        <table style="width: 100%;" class="table table-bordered">
        <tr style>
          <th>No</th>
          <th style="width:100px">NIK</th>
          <th style="width:150px">Email</th>
          <th>Employee Name</th>
          <th>Corporate</th>
          <th>Card No</th>
        </tr>
        <tr *ngFor="let row of data; let i = index " ngDefaultControl>
          <td >{{i+1}}</td>
          <!-- <p [(ngModel)]="form.nik">3213213213213</p> -->
          <td [(ngModel)]="form.nik"  ngDefaultControl>{{row[0]}}</td>
          <td [(ngModel)]="form.email" ngDefaultControl>{{row[1]}}</td>
          <td [(ngModel)]="form.namalengkap" ngDefaultControl>{{row[2]}}</td>
          <td *ngIf="getCorporateName(row[3])!=false">{{ getCorporateName(row[3]) }}</td>
          <td *ngIf="getCorporateName(row[3])==false">
            <select  [(ngModel)] = "data[i][3]">
              <option value="">Pilih Corporate</option>
              <option *ngFor="let item of dataCorporate" value="{{item.corporateid}}">{{item.corporatename}}</option>
            </select>
          </td>
          <td [(ngModel)]="form.cardno" ngDefaultControl>{{row[4]}}</td>
        </tr>
      </table>
</div></sb-card

TS：

form: any = {
    nik: '',
    email: '',
    fullname: '',
    aliasname: '',
    corporateid: '',
    partnerid: '',
    cardid: '',
};

功能TS：

saveThis() {
    // console.log(this.form);
    this.http
        .post(serverurl.serverUrl.apinode + 'api/karyawan/addnew', { data: this.form })
        .subscribe(res => {
            console.log(res)
            console.log(this.form)
        });
}

这是代码专家，对不起，我发布图片