html.actionLink 메소드

Question

수업이 있다고 가정 해 봅시다

public class ItemController:Controller
{
    public ActionResult Login(int id)
    {
        return View("Hi", id);
    }
}

항목 폴더에없는 페이지에서 ItemController 나는 Login 방법. 그래서 어느 것입니다 Html.ActionLink 사용해야하는 방법과 어떤 매개 변수를 전달해야합니까?

구체적으로, 나는 방법의 교체를 찾고있다

Html.ActionLink(article.Title,
    new { controller = "Articles", action = "Details",
          id = article.ArticleID })

그것은 최근 ASP.NET MVC 화신에서 은퇴했습니다.

Answer 1

나는 당신이 원하는 것이 이것이라고 생각합니다.

ASP.NET MVC1

Html.ActionLink(article.Title, 
                "Login",  // <-- Controller Name.
                "Item",   // <-- ActionMethod
                new { id = article.ArticleID }, // <-- Route arguments.
                null  // <-- htmlArguments .. which are none. You need this value
                      //     otherwise you call the WRONG method ...
                      //     (refer to comments, below).
                )

다음 방법 ActionLink 서명을 사용합니다.

public static string ActionLink(this HtmlHelper htmlHelper, 
                                string linkText,
                                string controllerName,
                                string actionName,
                                object values, 
                                object htmlAttributes)

ASP.NET MVC2

두 가지 논쟁이 전환되었습니다

Html.ActionLink(article.Title, 
                "Item",   // <-- ActionMethod
                "Login",  // <-- Controller Name.
                new { id = article.ArticleID }, // <-- Route arguments.
                null  // <-- htmlArguments .. which are none. You need this value
                      //     otherwise you call the WRONG method ...
                      //     (refer to comments, below).
                )

다음 방법 ActionLink 서명을 사용합니다.

public static string ActionLink(this HtmlHelper htmlHelper, 
                                string linkText,
                                string actionName,
                                string controllerName,
                                object values, 
                                object htmlAttributes)

ASP.NET MVC3+

인수는 MVC2와 동일한 순서이지만 ID 값은 더 이상 필요하지 않습니다.

Html.ActionLink(article.Title, 
                "Item",   // <-- ActionMethod
                "Login",  // <-- Controller Name.
                new { article.ArticleID }, // <-- Route arguments.
                null  // <-- htmlArguments .. which are none. You need this value
                      //     otherwise you call the WRONG method ...
                      //     (refer to comments, below).
                )

이것은 라우팅 로직을 링크에 하드 코딩하는 것을 피합니다.

 <a href="/Item/Login/5">Title</a> 

이것은 다음과 같은 HTML 출력을 제공합니다.

1. article.Title = "Title"
2. article.ArticleID = 5
3. 여전히 다음 경로가 정의되어 있습니다

. .

routes.MapRoute(
    "Default",     // Route name
    "{controller}/{action}/{id}",                           // URL with parameters
    new { controller = "Home", action = "Index", id = "" }  // Parameter defaults
);

Answer 2

추가하고 싶었습니다 조셉 킹리의 대답. 그는 해결책을 제공했지만 처음에는 일을 할 수 없었고 Adhip Gupta와 같은 결과를 얻었습니다. 그런 다음 경로가 처음에 존재해야한다는 것을 깨달았으며 매개 변수는 경로와 정확히 일치해야합니다. 그래서 나는 신분증과 내 경로에 대한 텍스트 매개 변수를 가지고 있었는데, 또한 포함되어야했습니다.

Html.ActionLink(article.Title, "Login", "Item", new { id = article.ArticleID, title = article.Title }, null)

Answer 3

당신은 그것을보고 싶을 수도 있습니다 RouteLink() 메소드를 사용하면 사전을 통해 모든 것을 지정할 수 있습니다 (링크 텍스트 및 경로 이름 제외).

Answer 4

I think that Joseph flipped controller and action. First comes the action then the controller. This is somewhat strange, but the way the signature looks.

Just to clarify things, this is the version that works (adaption of Joseph's example):

Html.ActionLink(article.Title, 
    "Login",  // <-- ActionMethod
    "Item",   // <-- Controller Name
    new { id = article.ArticleID }, // <-- Route arguments.
    null  // <-- htmlArguments .. which are none
    )

Answer 5

what about this

<%=Html.ActionLink("Get Involved", 
                   "Show", 
                   "Home", 
                   new 
                       { 
                           id = "GetInvolved" 
                       }, 
                   new { 
                           @class = "menuitem", 
                           id = "menu_getinvolved" 
                       }
                   )%>

Answer 6

Html.ActionLink(article.Title, "Login/" + article.ArticleID, 'Item") 

Answer 7

If you want to go all fancy-pants, here's how you can extend it to be able to do this:

@(Html.ActionLink<ArticlesController>(x => x.Details(), article.Title, new { id = article.ArticleID }))

You will need to put this in the System.Web.Mvc namespace:

public static class MyProjectExtensions
{
    public static MvcHtmlString ActionLink<TController>(this HtmlHelper htmlHelper, Expression<Action<TController>> expression, string linkText)
    {
        var urlHelper = new UrlHelper(htmlHelper.ViewContext.RequestContext, htmlHelper.RouteCollection);

        var link = new TagBuilder("a");

        string actionName = ExpressionHelper.GetExpressionText(expression);
        string controllerName = typeof(TController).Name.Replace("Controller", "");

        link.MergeAttribute("href", urlHelper.Action(actionName, controllerName));
        link.SetInnerText(linkText);

        return new MvcHtmlString(link.ToString());
    }

    public static MvcHtmlString ActionLink<TController, TAction>(this HtmlHelper htmlHelper, Expression<Action<TController, TAction>> expression, string linkText, object routeValues)
    {
        var urlHelper = new UrlHelper(htmlHelper.ViewContext.RequestContext, htmlHelper.RouteCollection);

        var link = new TagBuilder("a");

        string actionName = ExpressionHelper.GetExpressionText(expression);
        string controllerName = typeof(TController).Name.Replace("Controller", "");

        link.MergeAttribute("href", urlHelper.Action(actionName, controllerName, routeValues));
        link.SetInnerText(linkText);

        return new MvcHtmlString(link.ToString());
    }

    public static MvcHtmlString ActionLink<TController>(this HtmlHelper htmlHelper, Expression<Action<TController>> expression, string linkText, object routeValues, object htmlAttributes) where TController : Controller
    {
        var urlHelper = new UrlHelper(htmlHelper.ViewContext.RequestContext, htmlHelper.RouteCollection);

        var attributes = AnonymousObjectToKeyValue(htmlAttributes);

        var link = new TagBuilder("a");

        string actionName = ExpressionHelper.GetExpressionText(expression);
        string controllerName = typeof(TController).Name.Replace("Controller", "");

        link.MergeAttribute("href", urlHelper.Action(actionName, controllerName, routeValues));
        link.MergeAttributes(attributes, true);
        link.SetInnerText(linkText);

        return new MvcHtmlString(link.ToString());
    }

    private static Dictionary<string, object> AnonymousObjectToKeyValue(object anonymousObject)
    {
        var dictionary = new Dictionary<string, object>();

        if (anonymousObject == null) return dictionary;

        foreach (PropertyDescriptor propertyDescriptor in TypeDescriptor.GetProperties(anonymousObject))
        {
            dictionary.Add(propertyDescriptor.Name, propertyDescriptor.GetValue(anonymousObject));
        }

        return dictionary;
    }
}

This includes two overrides for Route Values and HTML Attributes, also, all of your views would need to add: @using YourProject.Controllers or you can add it to your web.config <pages><namespaces>

Answer 8

Use named parameters for readability and to avoid confusions.

@Html.ActionLink(
            linkText: "Click Here",
            actionName: "Action",
            controllerName: "Home",
            routeValues: new { Identity = 2577 },
            htmlAttributes: null)

Answer 9

With MVC5 i have done it like this and it is 100% working code....

@Html.ActionLink(department.Name, "Index", "Employee", new { 
                            departmentId = department.DepartmentID }, null)

You guys can get an idea from this...

Answer 10

This type use:

@Html.ActionLink("MainPage","Index","Home")

MainPage : Name of the text Index : Action View Home : HomeController

Base Use ActionLink

<html>
<head>
    <meta name="viewport" content="width=device-width" />
    <title>_Layout</title>
    <link href="@Url.Content("~/Content/bootsrap.min.css")" rel="stylesheet" type="text/css" />
</head>
<body>
    <div class="container">
        <div class="col-md-12">
            <button class="btn btn-default" type="submit">@Html.ActionLink("AnaSayfa","Index","Home")</button>
            <button class="btn btn-default" type="submit">@Html.ActionLink("Hakkımızda", "Hakkimizda", "Home")</button>
            <button class="btn btn-default" type="submit">@Html.ActionLink("Iletişim", "Iletisim", "Home")</button>
        </div> 
        @RenderBody()
        <div class="col-md-12" style="height:200px;background-image:url(/img/footer.jpg)">

        </div>
    </div>
</body>
</html>