您好我已经创建了一个angular2服务,其任务是调用webapi,它返回json对象结构中的数据,如下所示：
//Result of the webapi service call.
{
"Total":11,"Data":[{"Id":1,"Name":"A","StartDate":"2016-01-01T00:00:00"},{"Id":2,"Name":"B","StartDate":"2016-02-01T00:00:00"}]
}
这是我的angular2服务. getMileStones方法非常有效
我能够将回复转发给MileStone [].但是为了获取分页数据,我创建了一个函数getPagedMileStones(int,int),它调用webapi方法并返回结果如上所述结构.我想将返回的响应从webapi强制转换为IPagedResponse.但我无法使其正常工作.我有一个接口IPagedResponse,我希望此函数将此信息返回给组件调用,以便我可以提供分页功能.
import { MileStoneModel} from './milestoneModel'
import { Http,Response,Headers,RequestOptions } from '@angular/http'
import { Injectable } from '@angular/core'
import { Observable } from 'rxjs/Observable';
import {PaginatePipe,PaginationService,PaginationControlsCmp,IPaginationInstance} from 'ng2-pagination';
import 'rxjs/Rx';
export interface IPagedResponse<T> {
total: number;
data: T[];
}
export interface DataModel {
id: number;
data: string;
}
@Injectable()
export class MileStoneService //implements IPagedResponse<MileStoneModel>
{
data: MileStoneModel[];
//private _page: number = 1;
total: number;
private pagedResult: IPagedResponse<MileStoneModel>;
mileStones: MileStoneModel[]
private url: string = "http://localhost/ControlSubmissionApi/api/Milestones";
constructor(private http: Http) {
}
getMilestones(): Observable< MileStoneModel[]> {
return this.http.get(this.url)
.map((response: Response) => <MileStoneModel[]>response.json())
.catch(this.handleError);
}
***getTypedPagedMilestones(page: number,pageSize: number) {
debugger;
return this.http.get(this.url + "/" + page + "/" + pageSize)
.map((res: Response) => { this.data = <MileStoneModel[]>res.json().Data; this.total = res.json().Total; })
//.map((Data,Total) => { console.log(Data); console.log(Total); })***
.catch(this.handleError);
}
getMilestone(id: number):Observable< MileStoneModel> {
return this.http.get(this.url+"/"+id)
.map((response: Response) => <MileStoneModel>response.json())
.catch(this.handleError);
}
searchMileStones(name: string): Observable<MileStoneModel[]> {
let headers = new Headers({ 'Content-Type': 'application/json' });
let options = new RequestOptions({ headers: headers });
return this.http.get(this.url+"/search/"+name)
.map((response: Response) => <MileStoneModel[]>response.json())
.catch(this.handleError);
}
addMileStone(formdata:string) {
//let body = JSON.stringify({ newMileStone });
let headers = new Headers({ 'Content-Type': 'application/json' });
let options = new RequestOptions({ headers: headers });
return this.http.post(this.url,formdata,options)
.map((response: Response) => <MileStoneModel>response.json())
.catch(this.handleError);
}
private handleError(error: any) {
// In a real world app,we might use a remote logging infrastructure
// We'd also dig deeper into the error to get a better message
let errMsg = (error.message) ? error.message :
error.status ? `${error.status} - ${error.statusText}` : 'Server error';
console.log(errMsg); // log to console instead
return Observable.throw(errMsg);
}
}
这不行吗？我没有在您的代码中看到任何类型的IPagedResponse变量
pageResponse: IPagedResponse<MileStoneModel>;
getTypedPagedMilstones(page: number,pageSize: number): Observable<IPagedResponse<MileStoneModel>> {
return this.http.get(this.url + "/" + "/" + pageSize)
.map((res: Response) => {
this.pageResponse.data = <MileStoneModel[]>res.json();
this.pageResponse.total = res.json().Total;
})
.catch(this.handleError);
}
