错误：输入 '{ firstName: string;姓氏：字符串；年龄：数字； ...'不能用作索引类型

Question

我正在尝试将用户列表添加到数组，它抛出上面提到的错误

export interface User{
    firstName:string;
    lastName:string;
    age:number;
    address:{
        street:string,
        city:string,
        state:string
    }
}

这是我的界面

我在这里尝试添加类型为 user[]

的用户

import { Component, OnInit } from '@angular/core';
import { User } from '../../models/User';

@Component({
  selector: 'app-users',
  templateUrl: './users.component.html',
  styleUrls: ['./users.component.css']
})

export class UsersComponent implements OnInit {

  //Properties
  users :User[];

  //Methods
  constructor() { }

  ngOnInit() {
   this.users[
    {
      firstName: "John",
      lastName: "Doe",
      age: 30,
      address : {
        street: "3rd Cross",
        city: "Bangalore",
        state: "Karnataka"
      }
    }
   ];

  }

}

谁能解释一下我哪里出错了。 Program Error

Answer 1

代码应该是-

ngOnInit() {
   this.users = [
    {
      firstName: "John",
      lastName: "Doe",
      age: 30,
      address : {
        street: "3rd Cross",
        city: "Bangalore",
        state: "Karnataka"
      }
    }
   ];

  }

如错误所述，您没有为变量设置值。相反，您试图将值添加为格式错误的数组的索引。

错误：输入 '{ firstName: string;姓氏：字符串；年龄：数字； ...'不能用作索引类型

Err: Type '{ firstName: string; lastName: string; age: number; ...' cannot be used as an index type

angular

angular5

angular6