在反应式表单中设置嵌套表单组/控件值

Question

我的应用中有一个Reactive Form，结构如下：

this.bioForm = this._fb.group({
  firstName: [this.user.firstName, [Validators.required]],

  experience: this._fb.group({
    field0: ['', [Validators.required, Validators.maxLength(500)]],
    field1: ['', [Validators.required, Validators.maxLength(500)]],
    field2: ['', [Validators.required, Validators.maxLength(500)]],
    field3: ['', [Validators.required, Validators.maxLength(500)]],
    field4: ['', [Validators.maxLength(500)]],
    field5: ['', [Validators.maxLength(500)]]
  }),

  skills: this._fb.array([], Validators.required),
});

在我的浏览器local storage 我有以下内容：

我尝试过的：

 // Get Value from LOCAL STORAGE
 let localStorage_experience = JSON.parse(localStorage.getItem("experience")) || "";

 // Set nested form controls value
 this.bioForm.setValue({experience:{field0: localStorage_experience.field0 || ""}});

我正在尝试从本地存储中检索值并将它们设置为我的嵌套表单控件值。

Answer 1

您可以使用 setControl 来替换现有的 formcontrol/formgroup/formarray：

this.bioForm.setControl('experience', this._fb.group(localStorage_experience));

StackBlitz

或者你可以使用patchValue：

this.bioForm.patchValue({experience: localStorage_experience}); 

如果您想使用setValue，您需要将其应用于嵌套表单组，因为setValue 需要设置所有值。

this.bioForm.controls.experience.setValue(localStorage_experience);