Wouldn't this option you presented create a runtime cast error anyway? List<UIElement> elements = (List<UIElement>)VisualTreeHelper.FindElementsInHostCoordinates(e.GetPosition(null),this);
Hence .ToList() is better I would suggest. Another thing to consider is whether you actually need a List<> which forces the list to be fully populated. Leaving it as an IEnumerable<> will be more effecient in some scenarios, as the datasource may be lazy loading. On Wed, Oct 22, 2008 at 2:26 AM, .net noobie <[EMAIL PROTECTED]> wrote: > Thanks, I found this link for a ListBox version > needed to update the .HitTest to SL2 and it works fine > I only wanted a single column, I used a DataGrid because I was being lazy > and wanted to use the DataGrid Header, but I will just make that for a > ListBox :) > changed this line for SL2 > List<UIElement> elements = > (List<UIElement>)this.HitTest(e.GetPosition(null)); > to > List<UIElement> elements = > (List<UIElement>)VisualTreeHelper.FindElementsInHostCoordinates(e.GetPosition(null), > this); > > http://cid-71b364b59919d1e8.skydrive.live.com/self.aspx/Public/blog%20files/dragdrop|_updated.zip > which is the better way to do this line? > List<UIElement> elements = > (List<UIElement>)VisualTreeHelper.FindElementsInHostCoordinates(e.GetPosition(null), > this); > or > List<UIElement> elements = > VisualTreeHelper.FindElementsInHostCoordinates(e.GetPosition(null), > this).ToList(); > which one takes more work under the covers to make the conversion to a list? > > On Tue, Oct 21, 2008 at 8:57 PM, Valentin Stoychev > <[EMAIL PROTECTED]> wrote: >> >> I hope you will not treat this as an advertisement. >> >> Take a look at this example from the Telerik QuickStart Application. >> http://demos.telerik.com/silverlight/#Examples/DragAndDrop/FirstLook >> >> It is using the Telerik Drag/Drop framework that do exactly what you need, >> but with listboxes. Modifying the sample a little bit will do the job for a >> DataGrid. >> >> Regards, >> Valentin Stoychev >> Telerik >> >> On Tue, Oct 21, 2008 at 1:05 PM, Stephen Price <[EMAIL PROTECTED]> >> wrote: >>> >>> I got drag and drop between listboxes working in a prototype I was >>> working on few months ago. >>> I used canvas's and a method that checked for a collision/overlap between >>> the two elements when you did the drop. >>> Used the standard mouse approach of move events while button down to >>> animate the dragging around part. Had to clone the image element myself as >>> no clone in Silverlight. I've since had an idea of another way to copy the >>> image but haven't been back to test out my idea. (maybe using brush source - >>> you know how you can have video brushes all pointing at same source? >>> wondering if that would work with an image brush). >>> hope that makes sense... >>> cheers, >>> Stephen >>> >>> On Tue, Oct 21, 2008 at 4:00 PM, .net noobie <[EMAIL PROTECTED]> >>> wrote: >>>> >>>> I would like to be able to Drop & Drag a DataGridRow from one DataGrid >>>> to another...? >>>> does anyone have any tips or links on how I would do this please? >>>> >>>> -- >>>> .net noobie™ >>>> >>>> ------------------------------------------------------------------- >>>> OzSilverlight.com - to unsubscribe from this list, send a message back to >>>> the list with 'unsubscribe' as the subject. >>>> Powered by mailenable.com - List managed by www.readify.net >>> >>> ------------------------------------------------------------------- >>> OzSilverlight.com - to unsubscribe from this list, send a message back to >>> the list with 'unsubscribe' as the subject. >>> Powered by mailenable.com - List managed by www.readify.net >> >> ------------------------------------------------------------------- >> OzSilverlight.com - to unsubscribe from this list, send a message back to >> the list with 'unsubscribe' as the subject. >> Powered by mailenable.com - List managed by www.readify.net > > > -- > .net noobie™ > > ------------------------------------------------------------------- > OzSilverlight.com - to unsubscribe from this list, send a message back to > the list with 'unsubscribe' as the subject. > Powered by mailenable.com - List managed by www.readify.net ------------------------------------------------------------------- OzSilverlight.com - to unsubscribe from this list, send a message back to the list with 'unsubscribe' as the subject. Powered by mailenable.com - List managed by www.readify.net
