Angular 6物料表单重置使“验证”错误出现

Question

当我第一次加载页面时，表单显示如下

但是在我成功创建公告后，我用this.announcementCreateForm.reset()代码重设了页面，并按照以下方式重设了

我在buildAnnouncementForm()期间调用了以下方法ngOnInit()

 private buildAnnouncementForm() {
    this.announcementCreateForm = this.fb.group({
      announcementTitle: ['', [Validators.required]],
      announcementText: '',
      announcementFor: ['', [Validators.required]],
      announcementType: ['', [Validators.required]],
      announcementFromDate: [this.announcementFromDate, Validators.required],
      announcementToDate: [this.announcementToDate, Validators.required]
    });
  }

我在reset之后调用success

resetAnnouncementPage() {
    if (this.announcementCreateForm.valid) {
      console.log("Reset...");
      this.announcementCreateForm.reset();
      this.announcementCreateForm.markAsPristine();
      //this.announcementCreateForm.markAsUntouched();
    }
  }

我的重置，想让我携带加载时的样子吗。怎么做？

Answer 1

如果您想将表单还原为初始状态，请将该状态存储为一个值，并在您想重置表单时使用它来设置表单值， 不要执行form.reset()，它甚至会从from控件中删除空字符串。

initialFormValue = {
    announcementTitle: '',
    announcementText: '',
    announcementFor: '',
    announcementType: '',
    announcementFromDate: this.announcementFromDate,
    announcementToDate: this.announcementToDate
}

resetAnnouncementPage() {
    if (this.announcementCreateForm.valid) {
      console.log("Reset...");
      this.announcementCreateForm.setValue(this.initialFormValue);
      this.announcementCreateForm.markAsPristine();
    }
}

修改

您还可以在进行表单reset()时传递重置值。

private _initialValue

private buildAnnouncementForm() {

    this.announcementCreateForm = this.fb.group({
      announcementTitle: ['', [Validators.required]],
      announcementText: '',
      announcementFor: ['', [Validators.required]],
      announcementType: ['', [Validators.required]],
      announcementFromDate: [this.announcementFromDate, Validators.required],
      announcementToDate: [this.announcementToDate, Validators.required]
    });

    this._initialValue = this.announcementCreateForm.value

}

resetAnnouncementPage() {

    if (this.announcementCreateForm.valid) {
      this.announcementCreateForm.reset(this._initialValue);
    }

}

Answer 2

您必须将其标记为原始且未更改，然后重新验证。

this.announcementCreateForm.reset();
this.announcementCreateForm.markAsPristine();
this.announcementCreateForm.markAsUntouched();
this.announcementCreateForm.updateValueAndValidity();

Answer 3

我遵循了这些步骤并实现了

将formDirective添加到表单并将其传递给我的onSubmit方法

 <form #formDirective="ngForm" (ngSubmit)="onSubmit(formDirective)" [formGroup]="announcementCreateForm">

将formDirective参数传递给我的reset方法，并将reset formDirective传递给我，然后我reset传递了form

resetAnnouncementPage(formDirective:FormGroupDirective) {
    if (this.announcementCreateForm.valid) {
      formDirective.resetForm();
      this.announcementCreateForm.reset();
    }
  }