您将如何在 asp.net mvc 中实现面包屑助手? [英] How would you implement a breadcrumb helper in asp.net mvc?

问题描述

我知道你可以很容易地根据数据创建一个助手.因此，如果可能，请仅提交包含获取数据的答案.

I know you could make a helper pretty easily given the data. So, if possible, please only submit answers that also include getting the data.

推荐答案

我们为此使用了一个动作过滤器.

We are using an action filter for this.

...

    public override void OnActionExecuting(ActionExecutingContext filterContext)
    {
        var controller = (Controller) filterContext.Controller;
        Breadcrumb[] breadcrumbs = _breadcrumbManager.PushBreadcrumb(_breadcrumbLinkText);
        controller.ViewData.Add(breadcrumbs);
    }

在您提及之前，我也对过滤器属性中的服务位置感到反感 - 但我们几乎没有选择余地.IBreadcrumbManager 看起来像这样:

before you mention it, I too have a distaste for service location in the filter attributes - but we are left with few options. IBreadcrumbManager looks like this:

public interface IBreadcrumbManager
{
    Breadcrumb[] PushBreadcrumb(string linkText);
}

实现将面包屑对象放入会话中.网址是 HttpContext.Current.Request.RawUrl

The implementation puts Breadcrumb objects into the Session. The Url is HttpContext.Current.Request.RawUrl

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