Please note that the RadTagCloud control usually causes postback when any of its items is clicked and the AutoPostBack
property is set to true.
In order to
send an asynchronous request to the server and display loading image, while waiting the response, you can place the RadTagCloud into a RadAjaxPanel
control. Utilizing the LoadingPanelID
property of the AJAX panel, you can easily attach a loading panel, as required in your scenario.
In case you want to specify your own loading image, you will be able to achieve it by overriding the appropriate CSS class of the RadAjaxLoadingPanel.
I have attached a sample project, demonstrating the suggested approach. Please compare it with your actual project and let us know if there are differences in the setup and if the RadTagCloud is placed in RadAjaxPanel or another Ajaxifying control.
If you are still experiencing difficulties please provide more detailed description of your issue and the steps you take to reproduce it so that we can expose the problem.
the Telerik team