I'm to use two ComboBoxes to configure country and city. To prevent the whole page to reload on update the city combobox I want ot use an AjaxPanel with UpdatePanel. This AjaxPanel is surrounded by another AjaxPanel with UpdatePanel. The second AjaPanel is inise a Control which is laded dynamically depending on a selected item of a RadTreeView. The structure (splitted over several controls) looks like this:
<telerik:RadAjaxPanel ID="RadAjaxPanel1" runat="server" LoadingPanelID="LoadingPanel1">
<asp:UpdatePanel ID="UpdatePanel1" runat="server">
<telerik:RadAjaxPanel ID="RadAjaxPanel2" runat="server" LoadingPanelID="LoadingPanel2">
<asp:UpdatePanel ID="locationpanel" runat="server">
the two ComboBoxes
I tried this scenarios to make it work:
- I added a RadAjaxManager inside the mater page with AjaxSettings to update the second ComboBox when the first has changed. The result is that the page is completely empty
- Removed the settings from the RadAjaxManager -> still empty
- Added UpdateMode="Conditional" to the second UpdatePanel -> the page is shown and also the ComboBoxes but they dont work - the drropdown menue is not working
- Added Triggers to the second AjaxPanel -> the same result as without Triggers
I also added asp:DropDownLists and they work as they should, but when i make changes on the Lists i get a LAbel ubove the Listboxes saying "5843|updatePanel|ctl00_MainContent_ctl00_Person1_RadPanelBar1_i0_locationpanel| "
As it's a little bit complicated i uploaded the file to my cloud
I really hope that you can help me solve the problem with the ComboBoxes. Many thanks in advance for your help.