c# - Is it possible to have drag and drop from a ListView to a TreeView in Winforms? -

if it's not possible, can use 2 treeview controls. won't have hierarchy in second treeview control. it's gonna act sort of repository.

any code sample or tutorial helpful.

listview not support drag-and-drop naturally, can enable small bit of code:

http://support.microsoft.com/kb/822483

here's example drag-and-drop listview treeview (it's expert sex change link, wait few seconds , scroll bottom, you'll find answers):

http://www.experts-exchange.com/programming/languages/.net/visual_csharp/q_22675010.html

update: code link:

• create listview , treeview. ( in example, listview called listview1 , treeview called tvmain )
• on treeview, set allowdrop true.
• create itemdrag event on listview

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private void listview1_itemdrag(object sender, itemdrageventargs e)         {             listview1.dodragdrop(listview1.selecteditems, dragdropeffects.copy);         } 

in example items listview copied 'drop' object. now, create dragenter event on treeview:

private void tvmain_dragenter(object sender, drageventargs e)         {             e.effect = dragdropeffects.copy;         } 

this easy. hard part starts. following code adds selected (and dragged) listview items existing node (make sure have @ least 1 node in treeview or example fail!)

create dragdrop event on treeview:

private void tvmain_dragdrop(object sender, drageventargs e)         {             treenode n;              if (e.data.getdatapresent("system.windows.forms.listview+selectedlistviewitemcollection", false))             {                 point pt = ((treeview)sender).pointtoclient(new point(e.x, e.y));                 treenode dn = ((treeview)sender).getnodeat(pt);                 listview.selectedlistviewitemcollection lvi = (listview.selectedlistviewitemcollection)e.data.getdata("system.windows.forms.listview+selectedlistviewitemcollection");                  foreach (listviewitem item in lvi)                 {                     n = new treenode(item.text);                     n.tag = item;                      dn.nodes.add((treenode)n.clone());                     dn.expand();                     n.remove();                 }             }         } 

to change cursor while dragging, have create givefeedback event listview control:

private void listview1_givefeedback(object sender, givefeedbackeventargs e)         {             e.usedefaultcursors = false;              if (e.effect == dragdropeffects.copy)             {                 cursor.current = new cursor(@"myfile.ico");             }         } 

myfile.ico should in same directory .exe file.

this simple example. can extend way like.