如何使用按钮添加更多输入字段 – Angular 2动态表单
发布时间:2020-12-17 09:03:24 所属栏目:安全 来源:网络整理
导读:所以我在这里使用了指南: https://angular.io/docs/ts/latest/cookbook/dynamic-form.html 我需要在现有字段中添加更多字段.我做了一些有用的东西,但它很笨重,当它击中它时它重置了形状.代码如下: 在dynamic-form.component.ts中: add_textbox(){ this.qu
所以我在这里使用了指南:
https://angular.io/docs/ts/latest/cookbook/dynamic-form.html
我需要在现有字段中添加更多字段.我做了一些有用的东西,但它很笨重,当它击中它时它重置了形状.代码如下: 在dynamic-form.component.ts中: add_textbox() { this.questions.push(this.questionService.create_textbox({key: "test",label: "Test"})); console.log(this.questions); this.form = this.qcs.toFormGroup(this.questions); } 在question.service.ts create_textbox({key,value,label = '',order = 1,type = "text",description = "",help = ""}: {key?: any,value?: any,label?: any,order?: any,type?: any,description?: any,help?: any}) { return new TextboxQuestion({ key,label,order,description,type }); } 我的按钮也在dynamic-form.component.html中,但我希望它在dynamic-form-question.component.ts中.这可能吗?
首先
import { FormGroup,FormArray,FormBuilder,Validators } from '@angular/forms'; 然后 addForm: FormGroup; // form group instance constructor(private formBuilder: FormBuilder) {} ngOnInit() { // *** this is code for adding invoice details *** this.addForm = this.formBuilder.group({ invoice_no: ['',Validators.required],file_no: ['',description: ['',linktodrive: this.formBuilder.array([ this.initLink(),]) }); } initLink() { return this.formBuilder.group({ linkAddress: ['',Validators.required] }); } addLink() { const control = < FormArray > this.addForm.controls['linktodrive']; control.push(this.initLink()); } removeLink(i: number) { const control = < FormArray > this.addForm.controls['linktodrive']; control.removeAt(i); } 使用以下命令开始和关闭HTML: < div formArrayName =“linktodrive”>< / div> 要创建和删除表单的动态字段,请使用以下html: <div *ngFor="let address of addForm.controls.linktodrive.controls; let i=index"> <div> <span>Link {{i + 1}}</span> <span *ngIf="addForm.controls.linktodrive.controls.length > 1"><a (click)="removeLink(i)">REMOVE</a></span> </div> <!-- Angular assigns array index as group name by default 0,1,2,... --> <div [formGroupName]="i"> <input type="text" placeholder="Enter Link" formControlName="linkAddress"> </div> </div> 最后是“ADD”链接 <div><a (click)="addLink()"></a></div> (编辑:李大同) 【声明】本站内容均来自网络,其相关言论仅代表作者个人观点,不代表本站立场。若无意侵犯到您的权利,请及时与联系站长删除相关内容! |