I am sure you have answered this question before. But I have seen several solutions. Can you please indicate what is a preferred way of placing a RadTreeView into a RadComboBox? Also, I have read here and there that RadComboBox has leaks and a TreeView Control in a ComboBox has memoery leaks as well? Is this true?
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Hello Edward,
In Silverlight 4 everything more complex than a button leaks :) One of the reasons for that is the usage of ContentControl inside other controls. Unfortunately such control nesting is needed, because the Silverlight ContentPresenter does not have a Foreground property, hence in order to change the text Foreground color in visual states we have to use ContentControl. This is a known problem in Silverlight 4 and unfortunately there are no workarounds and we cannot do much to fix it. As far as I know Microsoft is working on a updated version of Silverlight, that will resolve the memory leak problems, but I cannot say when it will be available for download.
Regarding the TreeView in a ComboBox - there are many ways to do it, but I would prefer "TreeView in a DropDownButton":
http://blogs.telerik.com/valerihristov/posts/10-05-12/treeview_in_combobox_with_radcontrols_for_silverlight_or_wpf_final_take.aspx
This approach is much simpler than the others that I've described in the past - you do not mess with control templates, there are no attached behaviors, etc., hence there is less room for errors.
Sincerely yours,
Valeri Hristov
the Telerik team
In Silverlight 4 everything more complex than a button leaks :) One of the reasons for that is the usage of ContentControl inside other controls. Unfortunately such control nesting is needed, because the Silverlight ContentPresenter does not have a Foreground property, hence in order to change the text Foreground color in visual states we have to use ContentControl. This is a known problem in Silverlight 4 and unfortunately there are no workarounds and we cannot do much to fix it. As far as I know Microsoft is working on a updated version of Silverlight, that will resolve the memory leak problems, but I cannot say when it will be available for download.
Regarding the TreeView in a ComboBox - there are many ways to do it, but I would prefer "TreeView in a DropDownButton":
http://blogs.telerik.com/valerihristov/posts/10-05-12/treeview_in_combobox_with_radcontrols_for_silverlight_or_wpf_final_take.aspx
This approach is much simpler than the others that I've described in the past - you do not mess with control templates, there are no attached behaviors, etc., hence there is less room for errors.
Sincerely yours,
Valeri Hristov
the Telerik team
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