asp.net-mvc 从控制器内部使用 Html.ActionLink 和 Url.Action(...)
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Using Html.ActionLink and Url.Action(...) from inside Controller
提问by Petrus Theron
I want to write an HtmlHelper to render an ActionLink with pre-set values, eg.
我想编写一个 HtmlHelper 来呈现具有预设值的 ActionLink，例如。
<%=Html.PageLink("Page 1", "page-slug");%>
where PageLinkis a function that calls ActionLinkwith a known Action and Controller, eg. "Index" and "Page".
哪里PageLink是一个调用ActionLink已知动作和控制器的函数，例如。“索引”和“页面”。
Since HtmlHelperand UrlHelperdo not exist inside a Controlleror class, how do I get the relative URL to an action from inside a class?
由于HtmlHelper和UrlHelper不存在于Controller或类中，如何从类中获取操作的相对 URL？
Update:Given the additional three years of accrued experience I have now, here's my advice: just use Html.ActionLink("My Link", new { controller = "Page", slug = "page-slug" })or better yet,
更新：鉴于我现在拥有的额外三年积累的经验，这是我的建议：只需使用Html.ActionLink("My Link", new { controller = "Page", slug = "page-slug" })或更好，
<a href="@Url.Action("ViewPage",
new {
controller = "Page",
slug = "my-page-slug" })">My Link</a>
Your extension method may be cute and short, but it adds another untested point-of-failure and a new learning requirement for hires without adding any real value whatsoever. Think of it as designing a complex system. Why add another moving part, unless it adds reliability (no), readability (little, once you read moredocs), speed (none) or concurrency (none).
你的扩展方法可能既可爱又简短，但它增加了另一个未经测试的失败点和新的员工学习要求，而没有增加任何真正的价值。把它想象成设计一个复杂的系统。为什么要添加另一个活动部分，除非它增加了可靠性（无）、可读性（很少，一旦你阅读更多文档）、速度（无）或并发性（无）。
回答by jweyrich
Not sure I actually understood your question clearly, but, let me try.
不确定我是否真的清楚地理解了您的问题，但是，让我尝试一下。
To create a HtmlHelper extension like you described, try something like:
要像您描述的那样创建 HtmlHelper 扩展，请尝试以下操作：
using System;
using System.Web.Mvc;
using System.Web.Mvc.Html;
namespace Something {
public static class PageLinkHelper
{
public static string PageLink(
this HtmlHelper helper,
string linkText, string actionName,
string controllerName, object routeValues,
object htmlAttributes)
{
return helper.ActionLink(
linkText, actionName, controllerName,
routeValues, htmlAttributes);
}
}
}
As for your question on getting a URL from a class, depends on what kind of class you'll implement it. For example, if you want to get the current controller and action from a HtmlHelper extension, you can use:
至于您从类中获取 URL 的问题，取决于您将实现它的类。例如，如果您想从 HtmlHelper 扩展中获取当前控制器和操作，您可以使用：
string currentControllerName = (string)helper.ViewContext
.RouteData.Values["controller"];
string currentActionName = (string)helper.ViewContext
.RouteData.Values["action"];
If you want to get it from a controller, you can use properties/methods from the base class (Controller) to build the URL. For example:
如果你想从控制器获取它，你可以使用基类 (Controller) 中的属性/方法来构建 URL。例如：
var url = new UrlHelper(this.ControllerContext.RequestContext);
url.Action(an_action_name, route_values);
