Question

我想在Blazor中同步调用API，但无法正常工作。有没有一种方法可以同步调用API。请找到以下代码。

当前正在使用异步调用，如下所述：

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    <li>
      <div class="search-container">
        <form action="/action_page.php">
            <input type="text" placeholder="Search Quora" name="search" onfocus="quo(this)">
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      <a href="#user"><i class="fas fa-user-circle fa-lg"></i></a>
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    <p>By way of precaution, when all was complete De Rozier made a few short captive excursions, the balloon being fastened to earth by a rope. But all proving satisfactory, he decided to hazard a right away trip on the 21st of November 1783, when he was also to be accompanied by an equally courageous fellow-countryman, the Marquis dArlandes. It would be difficult to conceive a more daring and perilous enterprise than these two brave Frenchmen set themselves. They were to venture, by an untried way, into unknown realms where no mortal had been before; they were to entrust their lives to a frail craft whose capabilities had never yet been tested, and at a giddy height they were to soar aloft with an open fire, which at any moment might set light to the inflammable balloon and hurl them to destruction.
    t all proving satisfactory, he decided to hazard a right away trip on the 21st of November 1783, when he was also to be accompanied by an equally courageous fellow-countryman, the Marquis dArlandes. It would be difficult to conceive a more daring and perilous enterprise than these two brave Frenchmen set themselves. They were to venture, by an untried way, into unknown realms where no mortal had been before; they were
    t all proving satisfactory, he decided to hazard a right away trip on the 21st of November 1783, when he was also to be accompanied by an equally courageous fellow-countryman, the Marquis dArlandes. It would be difficult to conceive a more daring and perilous enterprise than these two brave Frenchmen set themselves. They were to venture, by an untried way, into unknown realms where no mortal had been before; they were
    
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尝试以下方法，但Blazor不支持：

    if(HttpClient == null)
    {
        HttpClient = new HttpClient();
        HttpClient.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue("Bearer", userContext.Token);
    }
    var json = JsonConvert.SerializeObject(request);
    HttpContent content = new StringContent(json, Encoding.UTF8, "application/json");
    
    var httpResponse = await HttpClient.PostAsync(api, content);
    
    httpResponse.EnsureSuccessStatusCode();
    
    var response = await httpResponse.Content.ReadAsStringAsync();
    var parsedResult = JObject.Parse(response);
    return parsedResult["returnObj"].ToString();

请提供解决方案

Answer 1

不知道这是否对您有帮助，但是不久前在Github上问了一个类似的问题：

https://github.com/dotnet/aspnetcore/issues/16217

编辑：

文章摘要：

基本上，您不应该执行同步Http调用。首选选项：Player.

如果您真的想进行同步，这是解决方案：

如果需要，可以在启动渲染器之前运行异步操作。例如，
class Player:

    nPlayers = 0
    player_list = []

    def __init__ (self):
        self.n = Player.nPlayers + 1
        Player.nPlayers += 1
        Player.player_list.append(self)
这是首选解决方案，而不是尝试阻止UI 线程（浏览器不允许的-他们会说该标签页已崩溃如果您要阻止UI线程）。

如何在Blazor中同步调用HttpClient

1 个答案: