Question

如何向ng-select下拉列表中添加一个额外的项，例如Create New in the following image：

这是我当前拥有的代码：

<ng-select
    [multiple]="true"
    [hideSelected]="true"
    [items]="robots"
    formControlName="RobotGUID"
    bindLabel="Name"
    bindValue="GUID"
>
    <ng-template ng-label-tmp let-item="item" let-clear="clear">
        <ng-container *ngIf="item.GUID">
            <span class="ng-value-icon left" (click)="onRobotEditClick($event, item.GUID)" aria-hidden="true">
                <i class="fas fa-edit btn-focus"></i>
            </span>
            <span class="ng-value-label">{{item.Name}}</span>
            <span class="ng-value-icon right" (click)="clear(item)" aria-hidden="true">×</span>
        </ng-container>
    </ng-template>
</ng-select>

我尝试使用<ng-option>，但该项目未出现在下拉菜单中。如何在模板中添加额外的项目？

Answer 1

您可以使用 [addTag] 和 addTagText。

[addTag] ：允许创建自定义选项。
addTagText ：使用标记时设置自定义文本。

app.component.html :

<ng-select [items]="cities" 
      bindLabel="name" 
      placeholder="Select city"      
      [(ngModel)]="selectedCity" 
      addTagText="Create New" 
      [addTag]="CreateNew">
</ng-select>

app.component.ts :

export class AppComponent {

    cities = [
        {id: 1, name: 'City1'},
        {id: 2, name: 'City2'},
        {id: 3, name: 'City3'},
        {id: 4, name: 'City4'},
        {id: 5, name: 'City5'}
    ];
    
   CreateNew(city){
     alert("Create New Clicked : "+city)
   }
}

图片：

1.

2.

Answer 2

您可以使用ng-footer-tmp在选择框中添加其他项目。

尝试这样：

.html

<ng-select [items]="cities"
               bindLabel="name"
               placeholder="Select city"
               [(ngModel)]="selectedCity">
      <ng-template ng-footer-tmp>
               <p class="create-new" (click)="CreateNew()">Create New </p>
      </ng-template>
</ng-select>

.style.css

.create-new {
   cursor: pointer;
   padding-top:5px;
   padding-bottom:10px
}
.ng-dropdown-footer{
    border-top:unset !important;
    padding: 0px 10px !important;
}
.ng-dropdown-footer:hover {
   background-color: #f5faff;
}

Working Demo

ng-select：添加其他选项

2 个答案: