如何在角度2中实现http获取？

Question

使用restcript和angular get数据使用rest API。我是angular 2和typescript的新手。请帮助我在我的应用程序中实现这一点

感谢

Answer 1

使用以下可能对您有用的代码

public vehicleinfo:any=[]
//query is your rest api url
getVehicleinfo(query){

            if (this.vehicleinfo) {
        // already loaded data  
       // console.log("already data loaded vehicleinfo") ;
        return Promise.resolve(this.vehicleinfo);
      }
    // don't have the data yet
    return new Promise(resolve => {
      // We're using Angular HTTP provider to request the data,
      // then on the response, it'll map the JSON data to a parsed JS object.
      // Next, we process the data and resolve the promise with the new data.
        this.http.get(query)
        .map(res => res.json())
        .subscribe(data => {
          // we've got back the raw data, now generate the core schedule data
          // and save the data for later reference
          this.vehicleinfo = data;
          resolve(this.vehicleinfo);
        });
    });
  }