LinkButton plays "click sound" (postbacks the whole page?)

Hi,

This is my first post here at the ASP.NET forums and I'm not sure if I'm in the correct category, so please correct me if I'm wrong.

My question concerns the LinkButton when used with AJAX .NET 1.0 RC1. I have a GridView inside a UpdatePanel. Inside that GridView there are various controls, some of them LinkButtons. When I click, for example, a ImageButton the UpdatePanel refreshes without making any "click sound" (the sound that Internet Explorer plays when a new page is requested). However, if I click a LinkButton the click sound is played. Why is this? If I replace all LinkButtons with normal Buttons or ImageButtons no click sound is heard, so the issue seems related to the LinkButton only. Is this behavior by design, or am I doing something wrong? Is the whole page postbacked when I click a LinkButton even if it resides in an UpdatePanel?

Thanks in advance!

If you place a asp:LinkButton in a asp:UpdatePanel and specify asynchronous post back, there should not be the whole page postback.Try to google "Click Sound" of the asp:LinkButton for some ideas.Maybe this is caused by the designers, which there is sound when clicking a asp:LinkButton.

Listbox selections to update secondary listbox items

Good Afternoon,

I am extremely new to the Atlas functionality, and am trying to address some customer requests using Atlas. Two listboxes, Category and SubCategory, are initially rendered on the page with all distinct values. My question is how to update the SubCategory listbox when items have been selected in the Category listbox. I have tried to include a parameter for the selection of the SubCategory items, but the list initially is rendered with no items since the parameter value is not assigned.

Any help, insight, or suggestions is greatly appreciated. Also, any suggestions on best practices is also welcome regarding controls utilizing Atlas (for example, using a dataset to populate the listbox versus going directly against the SQL tables).

Thank you,

Erik

Hi,

It sounds like the CascadingDropDown control in this toolkit may be the answer to your questions.

http://atlas.asp.net/atlastoolkit/CascadingDropDown/CascadingDropDown.aspx

Regards

Thank you for the response. Is there any way to utilize a listbox instead of a drop down? Currently, the users can select multiple items from the list.

Hi,

Could you initially populate the subcategory box in the page_load event (when not Page.Ispostback), then have the list updated with a control event parameter on the Category Listbox.

Hope this helps