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A lot of people override the Ajax helper to create an Ajax.ImageActionLink. This is fine but in some instances it's easier to use an Html.ImageActionLink.

For example, I had a requirement to return a file in a response stream - something that isn't possible with the Ajax method.

The code is fairly simple, and easy to customize to your requirements:

public static MvcHtmlString ImageActionLink(this HtmlHelper helper, string imagePath, 

  string actionName, string controllerName, object routeValues, object imageAttributes, 

  object linkAttributes)
{
  var urlHelper = new UrlHelper(helper.ViewContext.RequestContext, 

    helper.RouteCollection);

  var aBuilder = new TagBuilder("a");
  aBuilder.MergeAttributes(new RouteValueDictionary(linkAttributes));
  aBuilder.MergeAttribute("href", urlHelper.Action(actionName, controllerName, 

    routeValues));

  var imgBuilder = new TagBuilder("img");
  imgBuilder.MergeAttributes(new RouteValueDictionary(imageAttributes));
  imgBuilder.MergeAttribute("src", imagePath);

  aBuilder.InnerHtml = imgBuilder.ToString(TagRenderMode.SelfClosing);

  return new MvcHtmlString(aBuilder.ToString(TagRenderMode.Normal));

}