/// Method to get scrollbar in a visual object private static ScrollViewer GetScrollbar(DependencyObject dep) { for (int i = 0; i < VisualTreeHelper.GetChildrenCount(dep); i++) { var child = VisualTreeHelper.GetChild(dep, i); if (child != null && child is ScrollViewer) return child as ScrollViewer; else { ScrollViewer sub = GetScrollbar(child); if (sub != null) return sub; } } return null; } ScrollViewer scrollView = GetScrollbar(myDataGrid);It should work with other objects too, but I only tried with a WPF Datagrid. I lost some time to figure out how to do this, hope it helps.
Oct 15, 2010
WPF DataGrid Controlling the Scrollbar
I just started with WPF controls and one of the issues I came through is controlling the scrollbar in WPF objects. In WPF you have logical and visual trees. To get the scrollbar, Microsoft recommendation is to go trough the tree to get the scroll bar. So find my implementation below.
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Thanks for this.. it solved an issue I was having. Bind a ObservableCollection to my Dataset, and populate the collection initially. I never delete or add rows, i only update the values of fields in the rows programmatically. If i try and sort by a column it does so but does not re-sort when i update a value. To force this to occur i have to copy all the SortDescriptions, remove them from the datagrid and then re-add them. I then need to go through each column and assign the sort direction. In doing so.. the scroll bars seem to play tricks and sometimes move on there own. By getting the scroll bar vertical offset before performing the hack and then reassigning the offset after the hack is complete ensures my scroll bars dont move :) Thanks
ReplyDeleteThanks! That helped!
ReplyDeleteThanks! That helped a lot!
ReplyDeleteThank you. I've been trying to figure this out for about 2 hours.
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Hello nice poost
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