从Angular 8的下拉列表中获取选定的值 [英] Fetching Selected value from a dropdown list in Angular 8

问题描述

Am使用前端的Angular 8和后端的Laravel在单页应用程序上工作.我有一个具有输入文本字段和下拉列表的表单.文本输入字段上的值已在打字稿文件上很好地捕获，但是捕获从下拉列表中选择的值时出现问题，这样我就可以在后端提交了.

Am working on a Single Page Application using Angular 8 on the frontend and Laravel on the backend. I have got a form which has input text field and a dropdown list. The values on the text input fields are being captured well on the typescript file but am having a problem capturing the value selected from the drop down list so that I can submit on the backend..

〜请协助?

Create.component.html

<form #createForm=ngForm (ngSubmit)="onSubmit()">
    <div class="form-group row">
     <div class="col-sm-6">
        <label for="formGroupExampleInput">Child SurName</label>
        <input 
            type="text" 
            name="childSurName" 
            class="form-control" 
            id="childSurName" 
            placeholder="ChildSurName"
            [(ngModel)]="form.childSurName">
    </div>

    <div class="col-sm-6">
        <label for="child-gender">Child Gender</label>
        <select class="form-control" id="childGender" name="child-gender" required>
        <option value="" selected disabled> Child's Gender</option>
            <option value="Male"> Male</option>
            <option value="Female"> Female </option>
        </select>
    </div>
    </div>

    <div class="form-group row">
        <div class="col-sm-12">
            <button 
                type="submit" 
                class="btn btn-lg btn-success btn-block" 
                [disabled]="!createForm.valid">Save Details </button>
        </div>
    </div>
</form>

Create.component.ts

import { Component, OnInit } from '@angular/core';
import { AuthService } from 'src/app/Services/auth.service';
import { Router } from '@angular/router';
import { AuthCheckService } from 'src/app/Services/auth-check.service';

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

export class CreateComponent implements OnInit {

  public form = {
    childSurName: null,
    child-gender: null
  };

  public error = null;

  constructor(
       private Auth:AuthService,
       private router: Router,
       private AuthCheck : AuthCheckService) 
  { }

   //Submit form data to the backend via a function in he service file
   onSubmit(){
    this.Auth.submitFormData(this.form).subscribe(
      data => console.log(data),
      error => console.log(error)
    );
  }

  ngOnInit() {
  }

}

推荐答案

将以下内容添加到< select>

[(ngModel)]="form.childGender"

为了保持一致性，还可以将表单的键重命名为:

Also for consistency rename the key of your form to:

public form = {
   childSurName: null,
   childGender: null
};

以下是同样有效的 stackblitz .(请注意，在提交时，仅将表单记录到控制台)

Here's a working stackblitz for the same. (Note that on submit only the form is being logged to the console)

这篇关于从Angular 8的下拉列表中获取选定的值的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！