FormControl, FormArray } from '@angular/forms'; @Component({ selector: 'app-my-form', templateUrl: './my-form.component.html', styleUrls: ['./my-form.component.css'] }) export class MyFormComponent implements OnInit { myForm: FormGroup; ngOnInit() { this.myForm = new FormGroup({...
例如,要设置第一个元素的值为"example",可以使用control.setValue('example');。 以下是一个示例代码,演示如何在元素的FormArray中设置值: 代码语言:txt 复制 import { Component, OnInit } from '@angular/core'; import { FormGroup, FormBuilder, FormArray } from '@angular/forms'; @Component({ select...
我在angular中创建了一个formArray来表示被提名者的分布,它有两个字段Name和Proportion。加号按钮(+)添加新行,(X)按钮删除当前行。现在,我想对验证进行编码,使“比例”列的总数必须为100%(无论它包含多少个被提名人的姓名),例如:无姓名比例1 Andy 100(比例之和为100)---例如:2无姓名比例1 Andy 60 2 Bruce...
import { Component, OnInit } from '@angular/core'; import {FormControl, FormBuilder, FormGroup, FormArray } from '@angular/forms'; /** @title Select with multiple selection */ @Component({ selector: 'select-multiple-example', templateUrl: 'select-multiple-example.html', ...
You have completed an exploration of how Angular 2+ Reactive Forms andFormArraycan be used to add new form fields dynamically. This pattern is useful for scenarios where a user may need to enter data more than once. If you’d like to learn more about Angular, check outour Angular topic ...
when run app in angular empty page display why this happen and how to solve that Where can i find logs from .NET Core app hosted in Docker Where do I find ServerVariables("REMOTE_USER")? Where is AllowHtml Where is Controller Initialize Event? Where is my project.json? Where to download...
According to this technique, the increment λ of the array of grooves (i.e. the distance between adjacent parallel grooves) is linked to the angular rotation (or disorientation) Ψ between the two substrates by the following equation, in which aSi is the increment of the array of the substra...
我正在实现一个 Angular 拖放,我想使用 FormArray 来保存元素被放入的数组。问题是我无法将 formcontrol 应用于 div,因为它给出了错误错误:没有名称为“语言”的表单控件的值访问器 这是html <div> <div class="example-container"> <h2>Selected Languages</h2> <div cdkDropList #todoList="cdkDropList" [...
In this article, we will learn to create a new Angular 11 project using ng new command and then how to implement the form. After that we will create simple formArray example in visual studio code. Step 1 Create an Angular project setup using the below commands or however you create your...
我建议使用Angular Material以避免MaterializeCSS出现问题。 https://material.angular.io/ Angular的材料设计组件 角材料:Forms 角材料:Form-Field 看看Form-Field examples: <div class="example-container"> <mat-form-field> <input matInput placeholder="Input"> </mat-form-field> <mat-form-field> <textar...