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MVC 3 Helper for Hover Images...

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14 Feb 2012CPOL 35.8K   1   3
A simple MVC 3 Helper for handling Hover Images...
In this post, I will talk about something that I haven't found on the internet, which is quite simple to do, which is an MVC Helper for creating a Hover image button...

If you are a professional developer and work in a team, you must have people which make the graphical stuff of your website, because most developers (like me) just don't like it, it's just a completely separate job.

This code assumes that you already understand MVC.

So here are my images, one named OK.png and the other OK_Hover.png, that are located on the Content/Images/Buttons folder.

Now what I want do do is to use my helper (which appears on listing 1), to use it in my razor page, and that upon a click will redirect me to the corresponding view.

So in my index.cstml, I have:

HTML
@using HoverImageHelper.Helpers;
@{
 ViewBag.Title = "Index";
}
Index

@Html.ImageButton("OK", "OK")


So the first parameter corresponds to my PNG file, and the second to my action.

Listing 1
C#
/// 
/// This function creates an image button with a hover, based on a an image name (must be .PNG)
/// and its corresponding hover image
/// 
/// 
/// 
/// 
/// 
/// 
public static MvcHtmlString ImageButton
(this HtmlHelper helper, string imageName, string actionName, object routeValues)
 {
 //Gets the action name and routes
 var urlHelper = new UrlHelper(helper.ViewContext.RequestContext);
 var url = urlHelper.Action(actionName, routeValues);
 //Creates the image tag
 var imgTag = new TagBuilder("img");
 var imageUrl = string.Format("/Content/Images/{0}.png", imageName);
 imgTag.Attributes.Add("src", imageUrl);
 imgTag.Attributes.Add("onmouseover", "this.src='" + imageUrl.Replace(".", "_hover.") + "'");
 imgTag.Attributes.Add("onmouseout", "this.src='" + imageUrl + "'");
 imgTag.Attributes.Add("border", "0");
 //Creates the link tag
 TagBuilder imglink = new TagBuilder("a");
 imglink.MergeAttribute("href", url);
 imglink.InnerHtml = imgTag.ToString(TagRenderMode.SelfClosing);
 return MvcHtmlString.Create(imglink.ToString());
 }


And a corresponding overload (which I use on this example):

Listing 2
C#
public static MvcHtmlString ImageButton(this HtmlHelper helper, string imageName, string actionName)
 {
 return ImageButton(helper, imageName, actionName, null);
 } 


Happy programming!!!

You can grab the full code here:

https://skydrive.live.com/redir.aspx?cid=c80cb697c4b0eb01&resid=C80CB697C4B0EB01!1447&parid=C80CB697C4B0EB01!1446&authkey=!AJ4-nyhDI-I2ur0[^]

License

This article, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)


Written By
Software Developer (Senior) Messages S.A.S
France France
I am Web Developer at Messages, a printing company in Toulouse, France. I am particularly interested about Blazor, but my primary development platform at work is ASP.NET MVC with C#. I have 15 years experience in developing software, always using Microsoft Technologies.

Comments and Discussions

 
QuestionMVC3 Image Button Hover Helper -- How do I add the controller Pin
Val Bee5-Dec-12 12:38
Val Bee5-Dec-12 12:38 
AnswerRe: MVC3 Image Button Hover Helper -- How do I add the controller Pin
raphadesa12-Jan-13 12:20
raphadesa12-Jan-13 12:20 
QuestionRough Pin
Corey Fournier13-Feb-12 10:35
Corey Fournier13-Feb-12 10:35 
The article is a bit rough. Could you add a screen shot? Also can you actually upload the code to the project?

It sounds really great by the way, with out a screen shot i am left to guess exactly what it does and how it looks.

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