Is there an ASP.NET MVC HtmlHelper for image links

Question

The Html.RouteLink() HtmlHelper works great for text links. But what's the best way to link an image?

Answer 1

Create your own helper extension.

public static string Image(this HtmlHelper helper, string src, string alt)
{
    TagBuilder tb = new TagBuilder("img");
    tb.Attributes.Add("src", helper.Encode(src));
    tb.Attributes.Add("alt", helper.Encode(alt));
    return tb.ToString(TagRenderMode.SelfClosing);
}

Answer 2

this code has been tested on mvc4...

    public static MvcHtmlString ImageLink(this HtmlHelper htmlHelper, string imgSrc, string alt, string actionName, string controllerName, object routeValues, object htmlAttributes, object imgHtmlAttributes)
    {
        UrlHelper urlHelper = ((Controller)htmlHelper.ViewContext.Controller).Url;
        var imgTag = new TagBuilder("img");
        imgTag.MergeAttribute("src", imgSrc);
        imgTag.MergeAttributes((IDictionary<string, string>)imgHtmlAttributes, true);
        string url = urlHelper.Action(actionName, controllerName, routeValues);



        var imglink = new TagBuilder("a");
        imglink.MergeAttribute("href", url);
        imglink.InnerHtml = imgTag.ToString();
        imglink.MergeAttributes((IDictionary<string, string>)htmlAttributes, true);

        return MvcHtmlString.Create(imglink.ToString());

    }

Answer 3

This is an updated version that I have from MiniScalope answer above. I'm using VS2010 and ASP.Net MVC 2 Preview

        public static string ImageLink(this HtmlHelper htmlHelper, string imgSrc, string alt, string actionName, string controllerName, object routeValues, object htmlAttributes, object imgHtmlAttributes)
    {
        UrlHelper urlHelper = ((Controller)htmlHelper.ViewContext.Controller).Url;
        TagBuilder imgTag = new TagBuilder("img");
        imgTag.MergeAttribute("src", imgSrc);
        imgTag.MergeAttributes((IDictionary<string, string>) imgHtmlAttributes,true);
        string url = urlHelper.Action(actionName, controllerName, routeValues);



        TagBuilder imglink = new TagBuilder("a");
        imglink.MergeAttribute("href", url);
        imglink.InnerHtml = imgTag.ToString();
        imglink.MergeAttributes((IDictionary<string, string>)htmlAttributes, true);

        return imglink.ToString();

    }

Answer 4

<%= Html.RouteLink("PLACEHOLDER", ...).Replace("PLACEHOLDER", "<img src=""..."" alt=""..."" />")%>

Answer 5

I don't have enough SO swagger to add a comment, but this is a comment on MiniScalope's comment above:

UrlHelper urlHelper = ((Controller)htmlHelper.ViewContext.Controller).Url;

I would suggest making this an HtmlHelper extension method in itself (and simplify it), for reuse:

private static UrlHelper Url(this HtmlHelper helper)
{ 
  return new UrlHelper(helper.ViewContext.RequestContext);
}

Answer 6

Here is mine, it`s the core function make some overloads

public static string ImageLink(this HtmlHelper htmlHelper, string imgSrc, string alt, string actionName, string controllerName, object routeValues, object htmlAttributes, object imgHtmlAttributes)
{
    UrlHelper urlHelper = ((Controller)htmlHelper.ViewContext.Controller).Url;
    string imgtag = htmlHelper.Image(imgSrc, alt,imgHtmlAttributes);
    string url = urlHelper.Action(actionName, controllerName, routeValues);

    TagBuilder imglink = new TagBuilder("a");
    imglink.MergeAttribute("href", url);
    imglink.InnerHtml =imgtag;
    imglink.MergeAttributes(new RouteValueDictionary(htmlAttributes), true);

    return imglink.ToString();
}