我无法从 promise 对象的下拉列表中获取数据,它在控制台响应中显示数据。 Angular 承诺
I'm not able to get data in drop-down from promise object, it showing data in console response. Angular Promise
component.ts 文件如下:
deptList: Department[];
ngOnInit() {
this.service.getDeptList().then(res => this.deptList=
res as Department[]);
this.resetForm();
}
Service.ts 下面:
getDeptList(){
return this.http.get(environment.apiURL+'/dept/getAll').toPromise();
}
html 文件如下:
<div class="form-group">
<label>Department</label>
<select name="department" #department="ngModel" [(ngModel)]="service.formData.department"
class="form-control">
<option value="0">-Select-</option>
<option *ngFor="let dept of deptList" value="{{dept.id}}">{{dept.name}}</option>
</select>
</div>
现在,你的循环如下:
<tr *ngFor="let itemlist of service.requestItemList; let i=index">
</tr>
<td>{{itemlist.item}}</td>
<td>{{itemlist.code}}</td>
<td>{{itemlist.requestedQty}}</td>
<td>{{itemlist.rate}}</td>
<td>{{itemlist.dateRequiredBy}}</td>
<td> <a class="btn btn-sm btn-info text-white" (click)="AddOrEditOrderItem(null, service.formData.id)">
<i class="fa fa-pencil"></i></a>
</td>
cannot read property item of undefined
:这个错误与上面的代码有关,要解决你必须把你所有的td
放在tr
里面
修改您的代码,如下所示:
<tr *ngFor="let itemlist of service.requestItemList; let i=index">
<td>{{itemlist.item}}</td>
<td>{{itemlist.code}}</td>
<td>{{itemlist.requestedQty}}</td>
<td>{{itemlist.rate}}</td>
<td>{{itemlist.dateRequiredBy}}</td>
<td> <a class="btn btn-sm btn-info text-white" (click)="AddOrEditOrderItem(null, service.formData.id)">
<i class="fa fa-pencil"></i></a>
</td>
</tr>
component.ts 文件如下:
deptList: Department[];
ngOnInit() {
this.service.getDeptList().then(res => this.deptList=
res as Department[]);
this.resetForm();
}
Service.ts 下面:
getDeptList(){
return this.http.get(environment.apiURL+'/dept/getAll').toPromise();
} html 文件如下:
<div class="form-group">
<label>Department</label>
<select name="department" #department="ngModel" [(ngModel)]="service.formData.department"
class="form-control">
<option value="0">-Select-</option>
<option *ngFor="let dept of deptList" value="{{dept.id}}">{{dept.name}}</option>
</select>
</div>
现在,你的循环如下:
<tr *ngFor="let itemlist of service.requestItemList; let i=index">
</tr>
<td>{{itemlist.item}}</td>
<td>{{itemlist.code}}</td>
<td>{{itemlist.requestedQty}}</td>
<td>{{itemlist.rate}}</td>
<td>{{itemlist.dateRequiredBy}}</td>
<td> <a class="btn btn-sm btn-info text-white" (click)="AddOrEditOrderItem(null, service.formData.id)">
<i class="fa fa-pencil"></i></a>
</td>
cannot read property item of undefined
:这个错误与上面的代码有关,要解决你必须把你所有的td
放在tr
修改您的代码,如下所示:
<tr *ngFor="let itemlist of service.requestItemList; let i=index">
<td>{{itemlist.item}}</td>
<td>{{itemlist.code}}</td>
<td>{{itemlist.requestedQty}}</td>
<td>{{itemlist.rate}}</td>
<td>{{itemlist.dateRequiredBy}}</td>
<td> <a class="btn btn-sm btn-info text-white" (click)="AddOrEditOrderItem(null, service.formData.id)">
<i class="fa fa-pencil"></i></a>
</td>
</tr>