CS0117-“ httpclient”不包含“getFromjSonAsync'

Question

这是我的index.Razor文件的样子：

@page "/"

@using System.Net.Http.Json

<div class="main">
    <h1>Blazing Pizzas</h1>
    <ul class="pizza-cards">
        @if (specials != null)
        {
            @foreach (var special in specials)
            {
                <li style="background-image: url('@special.ImageUrl')">
                    <div class="pizza-info">
                        <span class="title">@special.Name</span>
                        @special.Description
                        <span class="price">@special.GetFormattedBasePrice()</span>
                    </div>
                </li>
            }
        }
    </ul>
</div>


@code
{
    // List of special offers
    List<PizzaSpecial> specials = new();

    protected override async Task OnInitializedAsync()
    {
        specials = await HttpClient.GetFromJsonAsync<List<PizzaSpecial>>(NavigationManager.BaseUri + "specials");
    }
}

我尝试安装较新版本的system.net.http.json，但错误持续了。

您的httpclient在索引中不直接可用。RAZOR组件，因此您可以手动注入它。

提示您的.RAZOR文件

@inject HttpClient Http
@inject NavigationManager NavigationManager

提示您的InitializedAsync使用：

Answer 1

await Http.GetFromJsonAsync