如何从json文件中获取json数据,以及如何仅使用angular 2进行显示。你能找到我在哪里弄错了
https://stackblitz.com/edit/angular2-notifications-example-fkngjs?file=app/app.component.html
this.http.request('http://localhost:4200/app/jsondata/details.json?home=place&owner=person&minval=min&maxval=max').
subscribe((res) => {
let alldetails = JSON.stringify(res);
});
答案 0 :(得分:0)
您忘记将HttpClientModule
导入app.module.ts中,如下所示
import { HttpClientModule } from '@angular/common/http';
您需要像下面这样在@NgModule
中使用它-
@NgModule({
imports: [
ReactiveFormsModule,
BrowserAnimationsModule,
BrowserModule,
FormsModule,
HttpClientModule
],
declarations: [ AppComponent, ExampleComponent,HeaderComponent,FooterComponent ],
bootstrap: [ AppComponent ]
})
这是app.module.ts的完整代码-
import { NgModule } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import { FormsModule, ReactiveFormsModule } from '@angular/forms';
import { BrowserAnimationsModule } from '@angular/platform-browser/animations';
import { AppComponent } from './app.component';
import { ExampleComponent } from './example.component';
import { HttpClientModule } from '@angular/common/http';
import { FooterComponent } from './footer/footer.component';
import { HeaderComponent } from './header/header.component';
@NgModule({
imports: [
ReactiveFormsModule,
BrowserAnimationsModule,
BrowserModule,
FormsModule,
HttpClientModule
],
declarations: [ AppComponent, ExampleComponent,HeaderComponent,FooterComponent ],
bootstrap: [ AppComponent ]
})
export class AppModule { }
但是,如果仅使用Angular 2,则需要从app.module.ts中的'@ angular / http'导入HttpModule
而不是HttpClientModule
。此外,您还需要使用{ {1}}来自“ @ angular / http”,而不是您的app.component.ts中的Http
这是一个有效的演示- https://stackblitz.com/edit/angular2-notifications-example-gunqm4