我正在学习Angular Form。这是一个简单的表单,具有ename / job / sal字段,ename / job是必填项。在我提交之前,当我输入值时,验证程序可以正常工作,清除功能也可以很好地擦除填充的文本。但是,在我单击提交(调用empForm.reset())之后,必填字段标记为红色-无效字段错误,清除按钮也无法消除红色,我认为这不是合理的行为。我只想提交后,所有字段原先都保留,而没有失败的验证红色标记。如何实现这一目标,谢谢。
感谢与问候,马丁。
<form [formGroup]="empForm" (ngSubmit)="onSubmit()">
<div class="fields-container">
<mat-form-field>
<input formControlName="ename" matInput placeholder=Ename>
<mat-error *ngIf="empForm.controls['ename'].errors?.required">Ename is required.</mat-error>
</mat-form-field>
<mat-form-field>
<input formControlName="job" matInput placeholder=Job>
<mat-error *ngIf="empForm.controls['job'].errors?.required">Job is required.</mat-error>
</mat-form-field>
<mat-form-field>
<input formControlName="sal" matInput placeholder=Salary>
</mat-form-field>
</div>
<div class="buttons-container">
<button mat-raised-button type="submit" [disabled]="empForm.invalid">Submit</button>
<button mat-raised-button type="button" (click)="onClear()">Clear</button>
</div>
</form>
import { Component, OnInit } from '@angular/core';
import { FormBuilder, Validators } from '@angular/forms';
@Component({
selector: 'app-emp',
templateUrl: './emp.component.html',
styleUrls: ['./emp.component.scss']
})
export class EmpComponent implements OnInit {
empForm;
constructor(private fb: FormBuilder) {
this.empForm = this.fb.group({
ename: ['', Validators.required],
job: ['', Validators.required],
sal: [1000]
})
}
ngOnInit(): void {
}
onSubmit(){
// save to db - TBD
this.empForm.reset();
}
onClear(){
this.empForm.reset();
}
}
这里是一个您可以这样做的示例
html
<form [formGroup]="form" novalidate (submit)="submit()" #myform="ngForm">
<input type="text" formControlName="firstName" />
<p *ngIf="form.get('firstName').hasError('required') && myform.submitted">Name is required</p>
<button type="submit">Submit</button>
</form>
component
constructor(private fb: FormBuilder) {
this.form = this.fb.group({
firstName: ['', Validators.required]
});
}
我们只是将ngForm指令导出到本地变量,并使用其提交的属性作为指示,以了解何时提交表单,仅此而已!
我认为它是已知的issue
,您可以尝试作为issue
:
HTML:
workaround
TS:
<form [formGroup]="empForm" #f="ngForm">
...
</form>
@ViewChild('f') myNgForm;
onSubmit() {
// Service call
this.myNgForm.resetForm();
}