Question

我一直在为我的一个网页开发一个stepper元素，并尝试实现.reset()功能，以便使用材料设计文档将{{3}转换为空白状态（{{3} }）

以多窗体组示例为例，通过将您放回到第一步并清除窗体，我可以看到.reset可以正常工作。但是，在尝试使用单一表单结构时，我发现stepper.reset()带您回到第一步，但并没有清除表单。

我尝试将重设按钮标记为Type="button"，因为单个表单要求在“下一步”和“后退”按钮上执行此操作，以防止在单击按钮时提交表单，但是没有看到任何更改。

我希望单击“重置”时会同时执行这两种操作，但是我不确定是否需要编写手动重置功能或代码中是否有错误。

任何对此的帮助将不胜感激。谢谢！

create.component.html

<form [formGroup]="formGroup" class="content-container" (ngSubmit)="onSubmit()">
  <h1>{{title}}</h1>
  <mat-vertical-stepper #stepper>
    <mat-step formGroupName="someFieldGroup" [stepControl]="someFieldGroup">
      <ng-template matStepLabel>Fill out Field</ng-template>
      <mat-form-field>
        <input matInput placeholder="Some Field" formControlName="someFieldCtrl" name="someFieldName" required>
        <mat-error>This field is required</mat-error>
      </mat-form-field>
      <div>
        <button type="button" mat-button matStepperNext>Next</button>
      </div>
    </mat-step>
    <mat-step formGroupName="anotherFieldGroup" [stepControl]="anotherFieldGroup">
      <ng-template matStepLabel>Fill out Field</ng-template>
      <mat-form-field>
        <input matInput placeholder="Another Field" formControlName="anotherFieldCtrl" name="anotherFieldName" required>
        <mat-error>This field is required</mat-error>
      </mat-form-field>
      <div>
        <button type="button" mat-button matStepperPrevious>Back</button>
        <button type="button" mat-button matStepperNext>Next</button>
      </div> 
    </mat-step>
    <mat-step formGroupName="dropdownFieldGroup" [stepControl]="dropdownFieldGroup">
      <ng-template matStepLabel>Select Option</ng-template>
      <mat-form-field>
        <mat-select placeholder="Select Option" disableOptionCentering formControlName="dropdownFieldCtrl" name="dropdownFieldName" required>
          <mat-option value="1">One</mat-option>
          <mat-option value="2">Two</mat-option>
          <mat-option value="3">Three</mat-option>
          <mat-option value="4">Four</mat-option>
        </mat-select>
        <mat-error>This field is required</mat-error>
      </mat-form-field>
      <div>
        <button type="button" mat-button matStepperPrevious>Back</button>
        <button type="button" mat-button matStepperNext>Next</button>
      </div>
    </mat-step>
    <mat-step>
      <ng-template matStepLabel>Done</ng-template>
      You are now done.
      <div>
        <button type="button" mat-button matStepperPrevious>Back</button>
        <button type="submit" mat-button>Done</button>
        <button mat-button (click)="stepper.reset()">Reset</button>
      </div>
    </mat-step>
  </mat-vertical-stepper>
</form>

create.component.ts

import { Component, OnInit } from '@angular/core';
import { FormGroup, FormControl } from '@angular/forms';

//Type Imports
import { Service } from '../service';
import { Post } from './post';

@Component({
  selector: 'app-create',
  templateUrl: './create.component.html',
  styleUrls: ['./create.component.css']
})
export class CreateComponent implements OnInit {

  title = 'Create';

  formGroup: FormGroup;
  post: Post = {} as Post;

  constructor(private service: Service) { }

  ngOnInit() {
    this.formGroup = new FormGroup({
      someFieldGroup: new FormGroup({
        someFieldCtrl: new FormControl(null)
      }),
      anotherFieldGroup: new FormGroup({
        anotherFieldName: new FormControl(null)
      }),
      dropdownFieldGroup: new FormGroup({
        dropdownFieldCtrl: new FormControl(null)
      })
    });
  }

  onSubmit() {
    this.post.someField = this.formGroup.get('someFieldGroup').get('someFieldName').value;
    this.post.anotherField = this.formGroup.get('anotherFieldGroup').get('anotherFieldName').value;
    this.post.dropdownField = this.formGroup.get('dropdownFieldGroup').get('dropdownFieldName').value;

    this.service.create(JSON.stringify(this.post)).subscribe(data => { console.log(data) });
  }
}

Answer 1

我正面临这一问题为好。在步进器上调用reset似乎只会使您回到第一步。如果您还对表单本身调用reset，则应清除表单字段。

示例：

Foo

角材料垂直步进单格式.reset（）无法正常运行

1 个答案: