Javascript Angular 2从url获取json数据
这是我在Angular 2中的代码。我想从JSON文件中获取数据,并将其显示在日历中。Javascript Angular 2从url获取json数据,javascript,json,angular,calendar,Javascript,Json,Angular,Calendar,这是我在Angular 2中的代码。我想从JSON文件中获取数据,并将其显示在日历中。 :我如何才能做到这一点?您可以创建一个包含日历数据的服务 let headers = new Headers(); headers.append('Content-Type', 'application/x-www-form-urlencoded'); let ep = './data.json'; this.events = this.http .get(ep, { headers: headers }
:我如何才能做到这一点?您可以创建一个包含日历数据的服务
let headers = new Headers();
headers.append('Content-Type', 'application/x-www-form-urlencoded');
let ep = './data.json';
this.events = this.http
.get(ep, { headers: headers })
.map(res => res.json())
.map(({results}: { results: Data[] }) => {
return results.map((data: Data) => {
return {
title: data.title,
start: new Date(data.from),
colors.yellow,
};
});
});
然后必须从模板中删除异步管道
之前:
getList(): any
{
var date = new Date( '2017-01-12' );
var date2 = new Date( '2017-03-17' );
return (
[
{ title: 'Beauty And The Beast', start: date2, color: { primary: '#e3bc08', secondary: '#FDF1BA' } },
{ title: 'La La Land', start: date, color: { primary: '#e3bc08', secondary: '#FDF1BA' } }
]
)
}
之后:
[events]="(events | async ) || []
然后调用组件中的服务:
[events]="(events) || []
[
{"title":"La La Land","from":1490475722305},
{"title":"Beauty And The Beast","from":1490475722305}
]
2。要使用
Http
获取data.json
文件,您需要将json文件放入assets文件夹:/assets/data.jsom
,以便应用程序可以访问它:localhost:8080/data.json
然后,您只需发出一个get请求
fetchEvents()
{
this.events= this._data_Service.getList()
}
以下是我使用的JSON:
fetchEvents(): void {
this.events = this.http
.get('../../assets/data.json') // the path may vary depending
// on your directory structure.
.map(res => res.json())
.map((results) => { // this might be different depending on
// your json and type definition.
return results.map((data: Data) => {
console.log({title: data.title,
start: new Date(data.from),
color: colors.yellow})
return {
title: data.title,
start: new Date(data.from),
color: colors.yellow,data
};
});
});
}// fetchEvents
最后,您可以在组件中包含类型定义:
[events]="(events) || []
[
{"title":"La La Land","from":1490475722305},
{"title":"Beauty And The Beast","from":1490475722305}
]
您可以创建包含日历数据的服务
let headers = new Headers();
headers.append('Content-Type', 'application/x-www-form-urlencoded');
let ep = './data.json';
this.events = this.http
.get(ep, { headers: headers })
.map(res => res.json())
.map(({results}: { results: Data[] }) => {
return results.map((data: Data) => {
return {
title: data.title,
start: new Date(data.from),
colors.yellow,
};
});
});
然后必须从模板中删除异步管道
之前:
getList(): any
{
var date = new Date( '2017-01-12' );
var date2 = new Date( '2017-03-17' );
return (
[
{ title: 'Beauty And The Beast', start: date2, color: { primary: '#e3bc08', secondary: '#FDF1BA' } },
{ title: 'La La Land', start: date, color: { primary: '#e3bc08', secondary: '#FDF1BA' } }
]
)
}
之后:
[events]="(events | async ) || []
然后调用组件中的服务:
[events]="(events) || []
[
{"title":"La La Land","from":1490475722305},
{"title":"Beauty And The Beast","from":1490475722305}
]
2。要使用
Http
获取data.json
文件,您需要将json文件放入assets文件夹:/assets/data.jsom
,以便应用程序可以访问它:localhost:8080/data.json
然后,您只需发出一个get请求
fetchEvents()
{
this.events= this._data_Service.getList()
}
以下是我使用的JSON:
fetchEvents(): void {
this.events = this.http
.get('../../assets/data.json') // the path may vary depending
// on your directory structure.
.map(res => res.json())
.map((results) => { // this might be different depending on
// your json and type definition.
return results.map((data: Data) => {
console.log({title: data.title,
start: new Date(data.from),
color: colors.yellow})
return {
title: data.title,
start: new Date(data.from),
color: colors.yellow,data
};
});
});
}// fetchEvents
最后,您可以在组件中包含类型定义:
[events]="(events) || []
[
{"title":"La La Land","from":1490475722305},
{"title":"Beauty And The Beast","from":1490475722305}
]