显示员工列表b时，函数getemployeelist会生成错误 [英] Function getemployeelist generate error when show listb of employee

问题描述

问题

生成服务getallemployee时出错

problem
get error when make service getallemployee

Conversion of type 'Promise<any>' to type 'Employee[]' may be a mistake because neither type sufficiently overlaps with the other. If this was intentional, convert the expression to 'unknown' first.ts(2352)
Conversion of type 'Promise<any>' to type 'Employee[]' may be a mistake because neither type sufficiently overlaps with the other. If th

在getemployeelist函数上完成错误

如何解决这个问题呢？



我尝试过：

error done on getemployeelist function
how to solve this problem please?

What I have tried:

export class Employee {
    EmployeeId : number;
    BranchCode:number;
    EmployeeName:string;
    EmployeeAge:number;
    JoinDate:Date;
    BirthDate:Date;
    Active : boolean;
}

import { Injectable } from '@angular/core'
import { HttpClient } from '@angular/common/http'
import {Employee} from'./employee.model'
import { Observable } from 'rxjs'
import 'rxjs/add/operator/map'
import 'rxjs/add/operator/toPromise'
import 'rxjs/add/observable/fromPromise'
import { map } from 'rxjs/operators'

@Injectable()
export class ApiService{
    employeeList : Employee[];
    constructor(private http : HttpClient){}

       
   
        
        getEmployeeList(): Observable<Employee[]> {
          return this.http
              .get('https://localhost:44326/api/Employee')
              .map((response: Response) => {
                  return <Employee[]>response.json();
              })
              .catch(this.handleError);
      }

}

推荐答案

错误非常具有自描述性。 this.http.get 返回 Promise 您不必要地尝试转换为您的实体。

使用

The error is pretty self-descriptive. this.http.get returns Promise which you unsuccesfully try to convert into your entities.
Use

this.http
.get('https://localhost:44326/api/Employee')
.then(res => //your logic) 

这篇关于显示员工列表b时，函数getemployeelist会生成错误的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！