Custom site logo not appearing on WebPart page

As you probably all know, SharePoint 2010 allows site administrators to change the sites logos just like 2007 did. This is done on the “Title, description, and icon” page

The picture then appears in the top left of the site pages, just before the page title/breadcrumb

 

The trouble is that this doesn’t work on WebPart pages, no matter what you do; users will still see the default yellow icon.

 

Cause

WebPart pages use the TitleBarWebPart, this WebPart allows you to specify a title and logo for the page using the button in the ribbon bar

The problem here is that whatever you do, this Web Part always overrides your site logo setting. If you specify a page specific logo along with the title, it will use it. If you don’t specify a page specific logo, it will use the default SharePoint logo.

This overriding is done in javascript by the code below that you will find at the end of your web part page :

var logoImg = documentGetElementsByName('onetidHeadbnnr0');
if (logoImg != undefined && logoImg[0] != undefined)
logoImg[0].src='/_layouts/images/siteIcon.png';

This javascript code is generated by the TitleBarWebPart, the “/_layouts/images/siteIcon.png” is replaced with the page specific logo if you set one. Thus this WebPart systematically overrides the site wide logo settings.
By the way you will notice that it doesn’t work under Chrome 8 because of a Javascript error.

Solution

Aaron Han suggested removing the Web part from the pages impacted on a MSDN forum:
http://social.msdn.microsoft.com/Forums/en-US/sharepoint2010customization/thread/9706669e-0488-45cd-9cf6-2edfef91f77f
If you don’t want to edit every single WebPart page and/or if you want to retain the ability to change the page title I have another solution for you.
My solution is to change the SiteLogoImage node name in the master page. Thus the javascript generated by the PageTitleWebPart is no longer able to change the logo.

Details

Open your master page and find the line starting with:

<SharePoint:SiteLogoImage name="onetidHeadbnnr0"

And replace the “onetidHeadbnnr0” name with something else; “onetidHeadbnnr1” will do the trick.

Conclusion

I haven’t seen any drawback with this technique, yet :). Tell me if you do !