C# 将json字符串强制转换为类型化数组

SampleDataController：

组成部分：

import { Component } from '@angular/core';
import { DataService } from '../store.service';

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

export class AppComponent {

  public itemsList: Item[];

  constructor(private logger: DataService) {}

  GetItems() {
    this.logger.GetAllItems().subscribe(
      data => this.itemsList = <Item[]>JSON.parse(JSON.stringify(data))
    )
  }
}

export interface Item {
  Id: number;
  Name: string;
  Surname: string;
}

使用Ok方法（而不是Json）返回序列化对象，使其功能更加完整：

[HttpGet("GetAllItems")]
public async Task<IActionResult> GetAllItems()
{
    return this.Ok(await _storeContext.Table.AsQueryable().ToListAsync());
}

在角度方面，默认情况下，假设响应主体包含JSON，因此您可以将服务改写为以下内容：

因此，您不需要手动反序列化任何内容，例如：使用JSON.parse，因为angular将负责此步骤。

键入HTTP请求

export class DataService {

  constructor(private http: HttpClient) { }

  GetAllItems(): Observable<Item[]> {
    return this.http.get<Item[]>("https://localhost:44381/api/SampleData/GetAllItems");
  }
}

无论如何，还有一些进一步的建议。请使用通用命名规则，方法和成员使用lowerCamelCase。还要避免使用异步管道进行订阅，或者至少取消订阅

<button mat-button (click)="GetItems()">GetItems!</button>

<li *ngFor="let item of itemsList">
  <span>
    <br />
    {{item.Name}}
    <br />
    {{item.Surname}}
  </span>
</li>

[
    {
        "id": 3,
        "name": "1",
        "surname": "2         "
    },
    {
        "id": 4,
        "name": "1",
        "surname": "2         "
    },
    {
        "id": 5,
        "name": "1",
        "surname": "2         "
    },

[HttpGet("GetAllItems")]
public async Task<IActionResult> GetAllItems()
{
    return this.Ok(await _storeContext.Table.AsQueryable().ToListAsync());
}

export class DataService {

  constructor(private http: HttpClient) { }

  GetAllItems(): Observable<Item[]> {
    return this.http.get<Item[]>("https://localhost:44381/api/SampleData/GetAllItems");
  }
}

export class DataService {

  constructor(private http: HttpClient) { }

  GetAllItems(): Observable<Item[]> {
    return this.http.get<Item[]>("https://localhost:44381/api/SampleData/GetAllItems");
  }
}

import { Component } from '@angular/core';
import { DataService } from '../store.service';

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

    export class AppComponent {

      public itemsList: Item[];

      constructor(private logger: DataService) {}

      GetItems() {
        this.logger.GetAllItems().subscribe(
          (data: Item[]) => this.itemsList = data
        )
      }
    }

export interface Item {
  Id: number;
  Name: string;
  Surname: string;
}