如何使用Blazor C＃传达JSON的对象？

发布于 2025-02-06 16:01:59 字数 626 浏览 1 评论 0原文

这是我的代码响应变量将返回JSON的响应，现在我想根据返回的值添加if语句，但它会给我带来错误。我尝试了很多事情，但我不明白它是如何做到的。有人请在这里帮助我

@code {

    private CountryTracker response;

    protected override async Task OnInitializedAsync()
    {
        response = await HttpClient.GetFromJsonAsync<CountryTracker>("http://ip-api.com/json/");
    }

    if(response?.country=="Nepal"){
          BlazorTimer timer = new(1000, 35);
        private int secondsLeft = 35;
    }
    else{
          BlazorTimer timer = new(1000, 15);
        private int secondsLeft = 15;
    }

，我想根据JSON的回应执行不同的动作，我该如何做这个plese帮助我。回应的对象是国家。我想在基本国家 /地区实施计时器的操作。

原文

This is my code here response variable will return the response of the json, now I want to add if statement according to the returned values but its throwing me errors. I tried many things but I don't understand how its done. Someone please help me

@code {

    private CountryTracker response;

    protected override async Task OnInitializedAsync()
    {
        response = await HttpClient.GetFromJsonAsync<CountryTracker>("http://ip-api.com/json/");
    }

    if(response?.country=="Nepal"){
          BlazorTimer timer = new(1000, 35);
        private int secondsLeft = 35;
    }
    else{
          BlazorTimer timer = new(1000, 15);
        private int secondsLeft = 15;
    }

Here I want to perform different action according to the json response, how can I do this plese help me. The object of response is country. I want to implement the operation of timer on the basic of country.

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烟─花易冷 2025-02-13 16:01:59

您不能在代码的顶层写语句。您的逻辑必须采用方法。实例成员（秒缩）不能在语句中有条件地声明。将此与您的代码进行比较：

@code {

    private CountryTracker response;
    private int secondsLeft;

    protected override async Task OnInitializedAsync()
    {
        response = await HttpClient.GetFromJsonAsync<CountryTracker>("http://ip-api.com/json/");

        if(response?.country=="Nepal"){
              BlazorTimer timer = new(1000, 35);
              secondsLeft = 35;
        }
        else{
              BlazorTimer timer = new(1000, 15);
              secondsLeft = 15;
        }
    }
}

You can't write statements at the top level of the code. Your logic must go in a method. And instance members (secondsLeft) cannot be conditionally declared in statements. Compare this with your code:

@code {

    private CountryTracker response;
    private int secondsLeft;

    protected override async Task OnInitializedAsync()
    {
        response = await HttpClient.GetFromJsonAsync<CountryTracker>("http://ip-api.com/json/");

        if(response?.country=="Nepal"){
              BlazorTimer timer = new(1000, 35);
              secondsLeft = 35;
        }
        else{
              BlazorTimer timer = new(1000, 15);
              secondsLeft = 15;
        }
    }
}

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