I am building a custom DNN module with Ajax features targeting DNN version 4.5.2 and later.

The code that I am converting to this new module uses a timer in javascript to do a callback to the server. It seems to me that this would fall under ClientAPI.

My situation is that doing a google search on "DotNetNuke ClientAPI" or "DotNetNuke Ajax" returns results from various stages and versions of DotNetNuke, ClientAPI, and Ajax. It is really hard to determine if the latest version of DNN does things an entirely different way than some of these code samples I find.

How do I implement the javascript callback to the server using the latest features of DNN version 4.5.2 or later? Source code would even be better.

Jon,

That's one of the articles that I already looked. I just downloaded and installed it. I'm using DNN 4.5.3. But it gave me an error:

Error: HelloAjax is currently unavailable.
DotNetNuke.Services.Exceptions.ModuleLoadException: The file '/DotNetNuke_2/DesktopModules/MyCompany - HelloAJAX/HelloAJAX.ascx' does not exist. ---> System.Web.HttpException: The file '/DotNetNuke_2/DesktopModules/MyCompany - HelloAJAX/HelloAJAX.ascx' does not exist. at System.Web.UI.Util.CheckVirtualFileExists(VirtualPath virtualPath) at System.Web.Compilation.BuildManager.GetVPathBuildResultInternal(VirtualPath virtualPath, Boolean noBuild, Boolean allowCrossApp, Boolean allowBuildInPrecompile) at System.Web.Compilation.BuildManager.GetVPathBuildResultWithNoAssert(HttpContext context, VirtualPath virtualPath, Boolean noBuild, Boolean allowCrossApp, Boolean allowBuildInPrecompile) at System.Web.UI.TemplateControl.LoadControl(VirtualPath virtualPath) at System.Web.UI.TemplateControl.LoadControl(String virtualPath) at DotNetNuke.UI.Skins.Skin.InjectModule(Control objPane, ModuleInfo objModule, PortalSettings PortalSettings) in D:\Projects\DotNetNuke_04.05.03_Source\Library\Components\Skins\Skin.vb:line 456 --- End of inner exception stack trace ---

That's were I questioned if it was worth trying to debug and fix something that wasn't built to work with this version.

I see in your code you use

  DotNetNuke.Framework.AJAX.RegisterPostBackControl(btnPostBack);

 However I'm trying to use javascript to call the callback. How would I go about doing that?

Great work by the way! 

I just tried installing it again, and it worked fine.  How did you install the module, and did you use the one labeled Install (HelloAJAX.zip NOT HelloAJAXSource.zip)? 

Also, what code are you referring to?  That module does not call that method.