プロパティ「http」はタイプ「Component」に存在しません、Angular 2
私は、angular2とTypeScriptの初心者であり、ng2フォームを理解するのにすでに半日を費やしました。私はすべてのルートを完成させ、必要なすべてのフォームを構築し、現在TypeScriptでangle2に投稿する方法を理解しようとしています
これは私のエラー：
エラー[デフォルト] simpleapp/src/app/clients/add-client/add-client.component.ts：52：16プロパティ 'http'はタイプ 'AddClientComponent'に存在しません。
そして、この問題の原因はどこにあるのかわかりません。インポートしましたangular/http私のコンポーネントでは、公式のチュートリアルにあるようにヘッダーと応答を提供しましたが、この問題はまだ見られます。私は何が欠けていて、私の問題はどこにありますか？前もって感謝します
これは私のコンポーネント：
import 'rxjs/add/operator/map';
import {Component} from '@angular/core';
import {Http, Response, RequestOptions, Headers} from '@angular/http';
import {Employee} from "./model/add-client.model";
@Component({
selector: 'app-add-client',
templateUrl: 'add-client.component.html',
styleUrls: ['add-client.component.css']
})
export class AddClientComponent {
departments: Array<any>;
firstName: '';
lastName: '';
id: null;
salary: null;
phone: null;
departmentId: null;
constructor(http: Http) {
http.get('api/departments')
.map((res: Response) => res.json())
.subscribe((departments: Array<any>) => this.departments = departments);
}
model = new Employee(
this.id,
this.firstName,
this.lastName,
this.salary,
this.departmentId,
this.phone
);
submitted = false;
addEmployee = 'api/employees'
handleError = 'Post Error';
onSubmit(model) {
this.submitted = true;
let body = JSON.stringify({ model });
let headers = new Headers({ 'Content-Type': 'application/json' });
let options = new RequestOptions({ headers: headers });
return this.http.post(this.addEmployee, body, options)
.catch(this.handleError);
}
}
これは私のtemplate：
<div class="container">
<md-card class="demo-card demo-basic">
<md-card-title color="primary back-header">Employee Form</md-card-title>
<md-card-content>
<form (ngSubmit)="onSubmit(model)" #employeeForm="ngForm">
<md-toolbar for="firstName">First Name</md-toolbar>
<md-input
class="demo-full-width input-text"
type="text"
id="firstName"
required
[(ngModel)]="model.firstName"
name="firstName"
#firstName="ngModel">
</md-input>
<md-toolbar for="lastName">Last Name</md-toolbar>
<md-input
class="demo-full-width input-text"
type="text"
id="lastName"
required
[(ngModel)]="model.lastName"
name="lastName"
#lastName="ngModel">
</md-input>
<md-toolbar for="salary">Salary</md-toolbar>
<md-input
class="demo-full-width input-text"
type="number"
id="salary"
placeholder="USD"
required
[(ngModel)]="model.salary"
name="salary"
#salary="ngModel">
</md-input>
<md-toolbar for="departmentId">Department</md-toolbar>
<select class="demo-full-width option-department input-text"
id="departmentId"
required
[(ngModel)]="model.departmentId"
name="departmentId"
#departmentId="ngModel">
<option
*ngFor="let department of departments"
[value]="department.id">{{department.name}}
</option>
</select>
<md-toolbar for="phone">Phone</md-toolbar>
<md-input
class="demo-full-width input-text"
type="number"
id="phone"
placeholder="phone #"
required
[(ngModel)]="model.phone"
name="phone"
#phone="ngModel">
</md-input>
<button md-raised-button color="primary"
type="submit"
class="btn btn-default"
[disabled]="!employeeForm.form.valid">Submit
</button>
</form>
</md-card-content>
</md-card>
<md-card [hidden]="!submitted">
<md-card-title>You submitted the following:</md-card-title>
<md-list>
<md-list-item>
<label>First Name:</label> {{model.firstName}}
</md-list-item>
<md-list-item>
<label>Last Name:</label> {{model.lastName}}
</md-list-item>
<md-list-item>
<label>Salary:</label> {{model.salary}}
</md-list-item>
<md-list-item>
<label>Department:</label> {{model.departmentId}}
</md-list-item>
<md-list-item>
<label>Phone:</label> {{model.phone}}
</md-list-item>
</md-list>
</md-card>
</div>
これは私のモジュール：
import { BrowserModule } from '@angular/platform-browser';
import { NgModule } from '@angular/core';
import { FormsModule } from '@angular/forms';
import { HttpModule } from '@angular/http';
import { MaterialModule } from '@angular/material';
import {MdListModule} from '@angular/material/list';
import { AppComponent } from './app.component';
import { routing, appRoutingProviders } from './app.routing';
//==============
import { ClientsComponent } from './clients/clients.component';
import { DepartmentsComponent } from './departments/departments.component';
import { AddClientComponent } from './clients/add-client/add-client.component';
import { AddDepartmentComponent } from './departments/add-department/add-department.component';
@NgModule({
imports: [
BrowserModule,
FormsModule,
HttpModule,
routing,
MaterialModule.forRoot(),
MdListModule.forRoot()
],
declarations: [
AppComponent,
ClientsComponent,
DepartmentsComponent,
AddClientComponent,
AddDepartmentComponent
],
providers: [appRoutingProviders],
bootstrap: [AppComponent]
})
export class AppModule { }
privateを追加して、コンポーネント全体でHttpインスタンスを使用できるようにします。
constructor(private http: Http)
http変数と関係があります。これを試してください
あなたのcomponent.tsで
constructor(http: Http) {
http.get('api/departments')
.map((res: Response) => res.json())
.subscribe((departments: Array<any>) => this.departments = departments);
}
試すことができます
constructor(private http: Http) {
http.get('api/departments')
.map((res: Response) => res.json())
.subscribe((departments: Array<any>) => this.departments = departments);
}
Exports宣言のモジュールでHttpモジュールをエクスポートする必要があります。
@NgModule({
imports: [CommonModule, RouterModule, ReactiveFormsModule, ],
declarations: [ ErrorMessagesComponent, FoodDashboardComponent ],
exports: [ CommonModule, ReactiveFormsModule, HttpModule, RouterModule, ]
})
エラーTS2339を発行：プロパティ 'http'は、コンストラクターconstructor（private http：Http）{this.http = http; }