具有路由值的辅助程序的C＃扩展方法

Question

I'm trying to make an extension method for the ActionLink helper with an image.

This is my extension method:

public static class MyHelpers
    {
        public static string ActionLinkWithImage(this HtmlHelper html, string imgSrc, string actionName)
        {
            var urlHelper = new UrlHelper(html.ViewContext.RequestContext);

            string imgUrl = urlHelper.Content(imgSrc);
            TagBuilder imgTagBuilder = new TagBuilder("img");
            imgTagBuilder.MergeAttribute("src", imgUrl);
            string img = imgTagBuilder.ToString(TagRenderMode.SelfClosing);

            string url = urlHelper.Action(actionName);

            TagBuilder tagBuilder = new TagBuilder("a")
            {
                InnerHtml = img
            };

            tagBuilder.MergeAttribute("href", url);

            return tagBuilder.ToString(TagRenderMode.Normal);
        }
    }

And im trying to use it like this:

@Html.ActionLinkWithImage("Images/del.png", "Delete", new { id = item.ItemID});

But my extension method does not have 'route values'. How do i implement this?

Answer 1

Like this:

public static string ActionLinkWithImage(this HtmlHelper html, string imgSrc, string actionName, object routeValues)
    {

    //Your code ...

    string url = urlHelper.Action(actionName, routeValues);

    }

Answer 2

Add an object parameter to your method

, object routeData) 

and pass this to the UrlHelper

new UrlHelper(new RequestContext(html.ViewContext.HttpContext, routeData))