Transformations

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Use of transformations is essential for all Image gallery web parts. You can view and alter transformations in the Transformations section of a web part properties window. For each transformation, by the means of the appropriate buttons, you can Select a predefined transformation from a list or Edit the current transformation and add a custom code to it.

 

Here are some examples of how you can alter the appearance of the Image gallery web part. This is the default thumbnail transformation code of the Image gallery web part:

 

<a href="?imagepath=<%# System.Web.HttpUtility.UrlEncode(DataBinder.Eval(Container, "DataItem.NodeAliasPath").ToString()) %>">

<%# IfEmpty(Eval("FileAttachment"), "no image", "<img alt=\"" + Eval("FileName") + "\" src=\"" + GetFileUrl("FileAttachment") + "?maxsidesize=180\" border=\"0\" />") %>

</a>

 

And this is how the gallery created using this transformation looks like:

 

devguide_clip0584

 

In the following example, we will add a red border around each thumbnail.

 

<div style="border: solid 3px Red">

<a href="?imagepath=<%# System.Web.HttpUtility.UrlEncode(DataBinder.Eval(Container, "DataItem.NodeAliasPath").ToString()) %>">

<%# IfEmpty(Eval("FileAttachment"), "no image", "<img alt=\"" + Eval("FileName") + "\" src=\"" + GetFileUrl("FileAttachment") + "?maxsidesize=180\" border=\"0\" />") %>

</a>

</div>

 

This is how the result looks like:

 

devguide_clip0585

 

This example shows how to display the file name and date and time of creation for each thumbnail in the gallery:

 

<a href="?imagepath=<%# System.Web.HttpUtility.UrlEncode(DataBinder.Eval(Container, "DataItem.NodeAliasPath").ToString()) %>">

<%# IfEmpty(Eval("FileAttachment"), "no image", "<img alt=\"" + Eval("FileName") + "\" src=\"" + GetFileUrl("FileAttachment") + "?maxsidesize=180\" border=\"0\" />") %>

</a>

<%# Eval("DocumentName") %> <br/>

<%# GetDateTime("DocumentCreatedWhen") %>

 

devguide_clip0586

 

 

 

Transformations for the Lightbox web part

 

When writing a custom transformation for the Lightbox web part, it is necessary to use the 'rel' and 'rev' parameters as highlighted in the transformation code below. The 'title' parameter is used to determine the description of the image displayed in the lightbox.

 

<a href="<%# GetDocumentUrl() %>" rel="lightbox[group]" rev="<%# Eval("NodeAliasPath") %>"

title="<%# Eval("FileDescription") %>"><img src="<%# GetFileUrl("FileAttachment") %>?maxsidesize=150"

alt="<%# Eval("FileName") %>" /></a>

 

Page url: http://devnet.kentico.com/docs/devguide/index.html?image_gallery_transformations.htm