471,357 Members | 1,175 Online
Bytes | Software Development & Data Engineering Community
Post +

Home Posts Topics Members FAQ

Join Bytes to post your question to a community of 471,357 software developers and data experts.

Rearrange items in ListView

I'm currently writing a photo album sotware in C#.
I'm using a ListView component to diaplay thumbnail previews of the photos
and want to give the user the possibility to rearrange the photos via a
drag&drop operation. The problem is that it only appears to be possible to
rearrange items in a ListView if its view property is not set to
View.LargeIcons (which is the one I need to diaplay the thumbs). If I
rearrage the items without changing the view, the moved items are placed at
the end of the list and if I change the view to View.List before the
rearranging I can't change it back again.
Here's the code:
private void lvPhotos_DragDrop(object sender,
System.Windows.Forms.DragEventArgs e)
// prevent lvPhotos from redrawing itself

// get the new location of the items
Point p = lvPhotos.PointToClient(new Point(e.X, e.Y));
int destIndex = lvPhotos.GetItemAt(p.X, p.Y).Index;

// create a new ListViewItems array
ListViewItem[] selItems = new ListViewItem[lvPhotos.SelectedItems.Count];
int[] selIndices = new int[lvPhotos.SelectedIndices.Count];

// create the listViewItems array that will be used instead of the
currently displayed one
ListViewItem[] newItems = new ListViewItem[lvPhotos.Items.Count];

for(int i = 0; i < selItems.Length; i++)
if(lvPhotos.SelectedIndices[i] == destIndex) // if any of the
selectedIndices is equal to the destIndex abort the operation

// fill the array with the currently selected items
selItems[i] = (ListViewItem)

// add the current selectedIndex to the selIndices array
selIndices[i] = lvPhotos.SelectedIndices[i];

// rearrange the photos in the album and break the operation if it can't
be saved
if(DoAlbumDragDrop(selIndices, destIndex) == false)

// switch the lvPhotos view to List, since we can't edit the item
arrangement in LargeIcon view
lvPhotos.View = View.List;

// add the items to lvPhotos
for(int i = selItems.Length - 1; i >= 0; i--)
lvPhotos.Items.Insert(destIndex, selItems[i]);

// remove the old items from lvPhotos
foreach(ListViewItem item in lvPhotos.SelectedItems)

// create a temp ImageList
ImageList ilTemp = new ImageList();
// fill the temp il with the photos in rearranged order
for(int i = 0; i < ilThumbs.Images.Count; i++)
if(i == destIndex)
int j;
for(j = selIndices.Length - 1; j >= 0; j--)
j = 0;
for(i = i; i < ilThumbs.Images.Count; i++)
if(i == selIndices[j])
ilTemp.Images.Add(ilThumbs.Images[i + j]);
// replace the current il with ilTemp
for(int i = 0; i < ilTemp.Images.Count; i++)
lvPhotos.Items[i].ImageIndex = i;

// reset the lvPhotos view
lvPhotos.View = View.LargeIcon;

// redraw lvPhotos

Thanks for your help in advance! :)

Jul 21 '05 #1
0 1750

This discussion thread is closed

Replies have been disabled for this discussion.

Similar topics

6 posts views Thread by Nick | last post: by
reply views Thread by tommazzo | last post: by
3 posts views Thread by RT | last post: by
1 post views Thread by =?Utf-8?B?UmF5IE1pdGNoZWxs?= | last post: by
reply views Thread by XIAOLAOHU | last post: by

By using Bytes.com and it's services, you agree to our Privacy Policy and Terms of Use.

To disable or enable advertisements and analytics tracking please visit the manage ads & tracking page.