Question

我试图在我的angular2应用程序中注入http模块，但我收到错误。

意外的价值＆＃39; Http＆＃39;由模块＆＃39; AppModule＆＃39;
导入

这就是我正在尝试的。

import { NgModule }      from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import { FormsModule } from '@angular/forms';
import { Http } from '@angular/http';
import { AppComponent }  from './app.component';

@NgModule({
    imports:      [ BrowserModule, FormsModule, Http],
    declarations: [ AppComponent ],
    bootstrap:    [ AppComponent ]
})
export class AppModule { }

这就是我尝试使用它的方式

import { Component } from '@angular/core';

@Component({
   selector: 'my-app',
   template: `<h1>Hello {{name}}</h1>
        Maintenance Name: <input type="text" [(ngModel)]="htmlToPublish.title"/>
        <textarea [(ngModel)]="htmlToPublish.html" rows="10" cols="50">Write here the HTML code that you want to publish
        </textarea> 
        <button (click)="sendHtml()">Publish</button>
       <p>
       {{htmlToPublish}}
       </p>
 `,
})

export class AppComponent  {

   constructor(public http: Http){

   } 

   name = 'Angular'; 
   htmlToPublish: HtmlPage

   public sendHtml() {
   // Here I want to use http that I injected in constructor

   }

}

Answer 1

将HttpModule添加到导入以获取Http

import { NgModule }      from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import { FormsModule } from '@angular/forms';
import { HttpModule } from '@angular/http'; // <<< changed
import { AppComponent }  from './app.component';

@NgModule({
    imports:      [ BrowserModule, FormsModule, HttpModule], // <<< changed
    declarations: [ AppComponent ],
    bootstrap:    [ AppComponent ]
})
export class AppModule { }

但是你需要注射Http的地方

import { Http } from '@angular/http';

不能在angular2中注入http

1 个答案: