When the TreeNode is expanded/collapsed we need to add/remove rows to/from the ListView Those controls are shifted to the right depending on the Node level. The ListViewItem template contains a special control named RowExpander which allows you to expand/collapse a node and any number of additional controls to represent the data. The basic idea is the following:įor each tree node we create a row in the ListView. TreeListViewīut there is an alternative way to display hierarchical data - use the ListView. It takes more the 10 seconds to expand a node containing 5000 subnodes! Even navigation becomes very slow - more than a second to just move a focus. For example, if you need to expand the currently selected node you have to use ItemContainerGenerator as described here or use a special model just to support selection/expanding (see here).Īnother weakness of the WPF TreeView is poor performance. Moreover, things that were quite easy to do in Windows Forms are now much more complex in WPF because there's no simple way to get the container item for your business object displayed in the TreeView. But in real application the lack of features like multiselection or multicolumn view become apparent. WPF TreeView seems like a major step forward, at first glance. Windows Forms TreeView has quite a limited functionality and provides no easy way to extend it. This articles explores the problems of standard WPF TreeView controls and describes a better way to display hierarchical data using a custom TreeListView control.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |