1
我有一個網格在我的模板中呈現,如下所示。網格有多個下拉列表(每行一個),當我點擊一個按鈕時,我收集這些值。然而,當我點擊按鈕後,我想將所有下拉菜單重置爲默認值。點擊按鈕後將下拉菜單重置爲默認值
<div>
<button (click)="onClickUpdate($event, filteredRequesters)">Update</button>
</div>
<tbody>
<tr *ngFor='let requester of filteredRequesters'>
<td>
<select id="ddStatus" type="number" (change)="onChange($event.target.value, requester)">
<option *ngFor="let level of levels">
{{level.name}}</option>
</select>
</td>
<td>{{ requester.RequesterID }}</td>
<td> {{ requester.FullName }} </td>
<td>{{ requester.CompanyName }}</td>
<td>{{ requester.RequesterClass}}</td>
<td>{{ requester.Address}}</td>
<td>{{ requester.MobilePhone}}</td>
<td>{{ requester.TotalRequests}}</td>
<td>{{ requester.EmailAddress}}</td>
</tr>
</tbody>
這是在typescript組件中的選擇下拉列表中設置選項的數組。
levels: Array<{ num: number, name: string, total: number }> = [
{ num: 0, name: "ignore", total: 0 },
{ num: 1, name: "child", total: 0 },
{ num: 2, name: "parent", total: 0 }
];
最後這裏是按鈕單擊代碼:
onClickUpdate(event, filteredRequesters) {
var count: number;
count = 0;
for (var i = filteredRequesters.length - 1; i >= 0; i--) {
if (count > 1) {
continue;
}
if (filteredRequesters[i].isDisabled == 2)
count++
}
if (count == 1) {
this._productService.updateRequester(filteredRequesters);
var countToRemove: number;
// get new total requests for merged reqwester
var countIndex: number = 0;
countToRemove = 0;
for (var i = filteredRequesters.length - 1; i >= 0; i--)
if (filteredRequesters[i].isDisabled == 1) {
countToRemove += filteredRequesters[i].TotalRequests;
}
else if (filteredRequesters[i].isDisabled == 2)
countIndex = i;
filteredRequesters[countIndex].TotalRequests += countToRemove;
filteredRequesters[countIndex].isDisabled = 0;
for (var i = filteredRequesters.length - 1; i >= 0; i--)
if (filteredRequesters[i].isDisabled == 1)
filteredRequesters.splice(i, 1);
// this._productService.getRequestersByFirsterLetter('a')
// .subscribe(products => {
// this.products = products;
// this.filteredRequesters = this.products;
// },
// error => this.errorMessage = <any>error);
}
else alert("Only one parent allowed. ")
}
請解釋什麼是不工作? – Vega
NP - - 點擊更新按鈕後。任何已被用戶更改的選擇都不會重置回初始選項。我需要所有的選擇重新回到最初的選項,但我不知道如何在打字稿中做到這一點。謝謝 – DeadlyDan
最簡單的方法,使它成爲一個窗體,只要你想調用'form.reset()'。如果這是一種可能性,那就是使它成爲一種形式。 – Alex