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Blazor NET C#从html<form>获得投入
原标题:Blazor .NET C# can t get input from html <form>

当我试图利用html<代码><form>对用户提出意见时,我发现错误:

CS0103 Der name “Request” ist im aktuellen Kontext nicht vorhanden.

也就是说:

CS0103 目前情况下不存在“请求”的名称。

这是我的C#法典:

@{
    double distance = 0;

    if (Request.Query.ContainsKey("distance"))
    {
        double.TryParse(Request.Query["distance"], out distance);
    }

我的超文本标记:

<p>Enter distance:</p>
<form method="get">
    <input type="text" name="distance" />
    <button type="submit">Calculate</button>
</form>

通常,这应当得到用户的投入,但它的确没有。

问题回答

错误是指汇编者不能找到集体要求

获取案文投入:

    @inject NavigationManager NavigationManager

@{
    double distance = 0;

    var uri = NavigationManager.ToAbsoluteUri(NavigationManager.Uri);
    var query = Microsoft.AspNetCore.WebUtilities.QueryHelpers.ParseQuery(uri.Query);

    if (query.ContainsKey("distance"))
    {
        double.TryParse(query["distance"], out distance);
        Console.WriteLine(distance.ToString());
    }
}

<p>Enter distance:</p>
<form method="get">
    <input type="text" name="distance" />
    <button type="submit">Calculate</button>
</form>




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