读取Helpers的URL参数

问题描述 投票:0回答:1

有助手负责将Active类添加到菜单中。

public static class HtmlHelpers
{
    public static string IsSelected(this IHtmlHelper html, string controller = null, string action = null, string status = null, string cssClass = null)
    {
        if (String.IsNullOrEmpty(cssClass))
            cssClass = "active";

        string currentAction = (string)html.ViewContext.RouteData.Values["action"];
        string currentController = (string)html.ViewContext.RouteData.Values["controller"];
        string currentStatus = (string)html.ViewContext.RouteData.Values["status"];


        if (String.IsNullOrEmpty(controller))
            controller = currentController;

        if (String.IsNullOrEmpty(action))
            action = currentAction;

        if (String.IsNullOrEmpty(status))
            status = currentStatus;

        return controller == currentController && action == currentAction && status == currentStatus ?
            cssClass : String.Empty;
    }

    public static string PageClass(this IHtmlHelper htmlHelper)
    {
        string currentAction = (string)htmlHelper.ViewContext.RouteData.Values["action"];
        return currentAction;
    }

}

虽然涉及标准URL参数(“controller} / {action} / {id?}”,但一切正常。但是如何读取URL中的变量。

https://localhost:/Contractors?Status=false

如何获取STATUS数据

附:对于那些后来想要使用Helper的人。 CHTML

<li class="@Html.IsSelected(action: "Index", controller: "Contractors", status: "true")"><a asp-action="Index" asp-controller="Contractors" asp-route-status="true">Clients</a></li>
c# asp.net-core asp.net-core-2.0
1个回答
1
投票

RouteData仅包含从路线中提取的值。因此,除非您将status参数添加到路径(例如/contractors/{status}),否则无法从路径数据中检索该值。

在这种情况下,它是一个常规的查询字符串参数,您可以从ViewContext.HttpContext.Request检索:

var status = html.ViewContext.HttpContext.Request.Query["status"].ToString();
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