我正在關注FormBuilder的Duringtram教程http://blog.thoughtram.io/angular/2016/06/22/model-driven-forms-in-angular-2.html我複製了代碼並更改了一些變量名稱。我使用的是Angular 2.1.2,Typescript 2.0.8和Angular Material2(來自Google)。 Atom Typescript說在任何頁面上都沒有錯誤。儘管如此,我在加載時遇到錯誤,並且頁面不會加載這個新代碼。角度2錯誤:無法解析FormGroup的所有參數
zone.js:388 Unhandled Promise rejection: Can't resolve all parameters for FormGroup: (?, ?, ?). ; Zone: <root> ; Task: Promise.then ; Value: Error: Can't resolve all parameters for FormGroup: (?, ?, ?).(…) Error: Can't resolve all parameters for FormGroup: (?, ?, ?).
at CompileMetadataResolver.getDependenciesMetadata (http://localhost:3000/node_modules/@angular/compiler/bundles/compiler.umd.js:14598:21)
at CompileMetadataResolver.getTypeMetadata (http://localhost:3000/node_modules/@angular/compiler/bundles/compiler.umd.js:14499:28)
at eval (http://localhost:3000/node_modules/@angular/compiler/bundles/compiler.umd.js:14642:43)
at Array.forEach (native)
at CompileMetadataResolver.getProvidersMetadata (http://localhost:3000/node_modules/@angular/compiler/bundles/compiler.umd.js:14622:21)
at CompileMetadataResolver.getDirectiveMetadata (http://localhost:3000/node_modules/@angular/compiler/bundles/compiler.umd.js:14262:36)
at eval (http://localhost:3000/node_modules/@angular/compiler/bundles/compiler.umd.js:14367:51)
at Array.forEach (native)
at CompileMetadataResolver.getNgModuleMetadata (http://localhost:3000/node_modules/@angular/compiler/bundles/compiler.umd.js:14361:51)
at RuntimeCompiler._compileComponents (http://localhost:3000/node_modules/@angular/compiler/bundles/compiler.umd.js:17063:49)consoleError @ zone.js:388_loop_1 @ zone.js:417drainMicroTaskQueue @ zone.js:421ZoneTask.invoke @ zone.js:339
2016-11-10 16:01:40.394 zone.js:390 Error: Uncaught (in promise): Error: Can't resolve all parameters for FormGroup: (?, ?, ?).(…)consoleError @ zone.js:390_loop_1 @ zone.js:417drainMicroTaskQueue @ zone.js:421ZoneTask.invoke @ zone.js:339
HTML樣品爲apartment4Rent.component.html
<form [formGroup]="registerApartment4RentForm" (submit)="onSubmit($event)">
<md-input id="country" name="country" class="required" aria-labelledby="country" formControlName="country"
i18n-placeholder="select country placeholder" placeholder="Country" type="text" size="30" maxlength="30">
</md-input>
加上4個相同的國家,城市,街道和郵編
AppComponent從教程構造 - 在應用程序文件夾中
import { Component, OnInit } from '@angular/core';
import { FormBuilder, FormGroup } from '@angular/forms';
import { ReactiveFormsModule } from '@angular/forms';
@Component({
moduleId: module.id,
selector: 'residence-app',
templateUrl: "components/navigation/headerFooter.html",
styleUrls: [ "components/navigation/styleHeaderFooter.css" ],
providers: [
FormBuilder,
FormGroup
]
})
export class AppComponent implements OnInit {
registerApartment4RentForm: FormGroup;
constructor(private formBuilder: FormBuilder) {}
ngOnInit() {
this.registerApartment4RentForm = this.formBuilder.group({
country: '',
stateProvince: '',
address: this.formBuilder.group({
streetAddress: '',
zipCode: '',
city: ''
})
});
}
}
的headerFooter.html在templateUrl有一些HTML的報頭和報尾以及
<div>
<router-outlet></router-outlet>
</div>
在之間
apartment4Rent.component.html負荷和前我嘗試這個反應形式代碼出現。我的目錄結構是app/components/input/apartment4Rent.component(s)
需要更改以使響應表單有效嗎?
由於進口。我從'@ angular/forms'添加了import {ReactiveFormsModule};到app.component,但得到相同的錯誤。我編輯了上面的代碼以顯示導入 –
不,您需要將導入添加到您的ngModule聲明中,通常稱爲AppModule,請參閱(http://blog.thoughtram.io/angular/2016/06/22/model-driven -forms-in-angular-2.html) – Robba
我已經編輯了答案,希望對我有幫助 – Robba