using ASP.NET AJAX controls Q3 2009 I placed several rad comboboxes in a RadDock element. The RadDock should act as a collapsable search panel for a RadGrid on the same page. In the Page_Load event all comboboxes are filled with complete appropriate data. The data of some of them can be confined by the selection of others as in the continents/countries example (related comboboxes). I can't get that example work.
I've implemented the "relation" between a brand and project combo:
The items of the project combobox are requested as follows (The helper methods returns a data table. It works fine.):
After selecting an item from the brand combobox the first appropriate project is shown. Further project entries are displayed only after I opened the project combobox two or three times. Debugging clearified that parameters and data/return values are correctly fetched and transmitted.
I've searched the examples, community and other online resources for two days, tried some of the offered solutions but, nothing worked. A hint what I'm doing wrong would be really helpful. If you need more details or code snippets please let me know about.
Thanks in advance,