Question

我正在使用Angular2的ReactiveFormsModule来创建包含表单的组件。这是我的代码：

foo.component.ts

constructor(fb: FormBuilder) {
    this.myForm = fb.group({
        'name': ['', Validators.required],
        'surname': ['', Validators.required],
        'gender': []
    });
}

foo.component.html

<div class="two fields">
    <div class="four wide field">
        <label>Name*</label>
        <input type="text" [formControl]="myForm.controls.name"/>
    </div>

    <div class="four wide field">
        <label>Surname*</label>
        <input type="text" [formControl]="myForm.controls.surname"/>
    </div>
</div>

<div class="inline fields">
    <label for="gender">Gender</label>
    <div class="field">
        <div class="ui radio checkbox">
            <input type="radio" name="gender" checked="" tabindex="0" class="hidden" [formControl]="myForm.controls.gender">
            <label>Male</label>
        </div>
    </div>
    <div class="field">
        <div class="ui radio checkbox">
            <input type="radio" name="gender" tabindex="0" class="hidden" [formControl]="myForm.controls.gender">
            <label>Female</label>
        </div>
    </div>
</div>

我上面发布的代码不起作用：如果我点击两个单选按钮中的一个，它总是选择第二个，我无法更改它。

FormControl使用radio（或checkbox）的正确方法是什么？

Answer 1

除字符串值以外，您可以使用 [value] 属性，并且 [checked] 属性也应用于初始值。< / p>

export enum Gender {
  FEMALE = 1,
  MALE   = 2
}

export class SampleGenderComponent implements OnInit {

  public form: FormGroup;
  public Gender = Gender;

  constructor(fb: FormBuilder) {

    this.form = fb.group({
      gender    : [
        Gender.FEMALE,
        []
      ]
    });
  }
}

<div class="inline fields">
  <label for="gender">Gender</label>
  <div class="field">
    <div class="ui radio checkbox">
      <input type="radio" name="gender" [value]="Gender.MALE" [checked]="form.controls['gender'].value === Gender.MALE">
      <label>Male</label>
    </div>
  </div>
  <div class="field">
    <div class="ui radio checkbox">
      <input type="radio" name="gender" [value]="Gender.FEMALE" [checked]="form.controls['gender'].value === Gender.FEMALE">
      <label>Female</label>
    </div>
  </div>
</div>

Answer 2

我解决了将value属性与相关值添加到radio元素：

<div class="inline fields">
    <label for="gender">Gender</label>
    <div class="field">
        <div class="ui radio checkbox">
            <input type="radio" name="gender" value="male" checked="" tabindex="0" class="hidden" [formControl]="myForm.controls.gender">
            <label>Male</label>
        </div>
    </div>
    <div class="field">
        <div class="ui radio checkbox">
            <input type="radio" name="gender" value="female" tabindex="0" class="hidden" [formControl]="myForm.controls.gender">
            <label>Female</label>
        </div>
    </div>
</div>

这使它适用于[formControl]和formControlName。（感谢@JsIsAwesome）

Answer 3

将formControl更改为formControlName并设置控件名称。并且不要忘记在表单标签中设置 [formGroup] =＆＃34; myForm＆＃34; 。

这很好用：

INSERT INTO Comp
values 
  ('Montreal','ABC'),
  ('QuebecCity','ABC'),
  ('Mont-tremblant','ABC'),
  ('Saint-donant','ABC'),
  ('Saint-savaure','ABC'),

  ('Montreal','QQQ'),
  ('QuebecCity','QQQ'),
  ('Mont-tremblant','QQQ'),
  ('Saint-donant','QQQ'),
  ('Saint-savaure','QQQ'),

  ('Montreal','www'),
  ('QuebecCity','www'),
  ('Mont-tremblant','www'),

  ('Montreal','dd'),
  ('QuebecCity','dd'),
  ('Mont-tremblant','dd'),
  ('Saint-donant','dd'),
  ('Saint-savaure','dd'),  
  ('trois rivieres','dd'),
  ('perce','dd'),

  ('City1','SSS'),
  ('City2','SSS'),
  ('City3','SSS'),
  ('City4','SSS'),
  ('Saint-savaure','SSS'),  
  ('City6','SSS'),
  ('City7','dd')

Angular2 ReactiveFormsControl：如何绑定单选按钮？

3 个答案: