I have two listbox controls both having SelectionMode="Multiple". First one is populated from object data source. Selecting an item in the first listbox causes the SelectedIndexChanged event to fire, where I populate the second one and select all items in it. Then I select an item in the second listbox in a browser and click a button (or cause any other postback). After that all items in the second listbox are selected again. I've found two ways to select something other than all items.
1. Selecting items while holding ctrl key seems to work, but it's not very handy.
2. In the second listbox moving the scrollbar, selecting an item and then causing postback gets all items unselected (even the one just selected). Then selecting works as expected.
here is my asp sample:
and here is code behind
I checked this issue on Opera and Firefox browsers. I'm using .net 3.5, visual studio 2008 and Telerik RadControls for ASP.NET Ajax v. 2009.2.701.35Thanks in advance.