问题描述
我正在使用Angular2的 ReactiveFormsModule
创建一个包含表单的组件。这是我的代码:
I'm using ReactiveFormsModule
of Angular2 to create a component that contains a form. Here is my code:
foo.component.ts :
constructor(fb: FormBuilder) {
this.myForm = fb.group({
'fullname': ['', Validators.required],
'gender': []
});
}
foo.component.html (带有 [formControl]
):
<div class="fields">
<div class="field">
<label>Fullname*</label>
<input type="text" [formControl]="myForm.controls.fullname"/>
</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>
foo.component.html (带有 formControlName
):
<div class="fields">
<div class="field">
<label>Fullname*</label>
<input type="text" formControlName="fullname"/>
</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" formControlName="gender">
<label>Male</label>
</div>
</div>
<div class="field">
<div class="ui radio checkbox">
<input type="radio" name="gender" tabindex="0" class="hidden" formControlName="gender">
<label>Female</label>
</div>
</div>
</div>
两种方法都可以。但是我不知道使用 [formControl]
和 formControlName
有什么区别。
Both ways work. But i cannot figure out what is the difference between using [formControl]
and formControlName
.
推荐答案
我相信您错过了重要的一点:第二个示例中的 [formGroup]
指令。 formControlName
与 [formGroup]
一起使用可以保存表单的多个点导航。例如:
I believe you missed an important point: [formGroup]
directive in the second example. formControlName
is used together with [formGroup]
to save your form multiple dot navigations. For example:
<div>
<input type="text" [formControl]="myForm.controls.firstName"/>
<input type="text" [formControl]="myForm.controls.lastName"/>
<input type="text" [formControl]="myForm.controls.email"/>
<input type="text" [formControl]="myForm.controls.title"/>
</div>
等效于:
<div [formGroup]="myForm">
<input type="text" formControlName="firstName"/>
<input type="text" formControlName="lastName"/>
<input type="text" formControlName="email"/>
<input type="text" formControlName="title"/>
</div>
现在想象嵌套的 FormGroups
:)
这篇关于formControlName和FormControl有什么区别?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!