在Angular中,可以使用FormArray来动态绑定ngSelect下拉框。FormArray是一个表单控件,用于处理动态生成的表单控件数组。
首先,需要在组件中创建一个FormArray对象,并将其初始化为空数组。然后,在模板中使用ngFor指令遍历FormArray,并为每个下拉框绑定ngSelect指令。
以下是实现动态绑定ngSelect下拉框的步骤:
import { Component, OnInit } from '@angular/core';
import import { FormBuilder, FormGroup, FormArray } from '@angular/forms';
export class YourComponent implements OnInit {
form: FormGroup;
selectOptions: any[] = ['Option 1', 'Option 2', 'Option 3'];
constructor(private formBuilder: FormBuilder) { }
ngOnInit() {
this.form = this.formBuilder.group({
selectArray: this.formBuilder.array([])
});
}
}
<form [formGroup]="form">
<div formArrayName="selectArray">
<div *ngFor="let select of form.get('selectArray').controls; let i = index">
<select [formControlName]="i">
<option *ngFor="let option of selectOptions" [value]="option">{{ option }}</option>
</select>
</div>
</div>
</form>
export class YourComponent implements OnInit {
// ...
addSelect() {
const selectArray = this.form.get('selectArray') as FormArray;
selectArray.push(this.formBuilder.control(''));
}
removeSelect(index: number) {
const selectArray = this.form.get('selectArray') as FormArray;
selectArray.removeAt(index);
}
}
<button (click)="addSelect()">Add Select</button>
<div formArrayName="selectArray">
<div *ngFor="let select of form.get('selectArray').controls; let i = index">
<select [formControlName]="i">
<option *ngFor="let option of selectOptions" [value]="option">{{ option }}</option>
</select>
<button (click)="removeSelect(i)">Remove</button>
</div>
</div>
通过以上步骤,你可以在Angular FormArray中动态绑定ngSelect下拉框。每次点击"Add Select"按钮,都会添加一个新的下拉框,点击"Remove"按钮可以删除对应的下拉框。
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