/// <summary>
/// Handle drop from data list
/// </summary>
/// <param name="sender">The sender of the event</param>
/// <param name="e">The event arguments</param>
private void txtValue_DragDrop(object sender, DragEventArgs e)
{
DataRowView drv;
StringBuilder sb;
if (!e.Data.GetDataPresent(typeof(DataListBeginDragEventArgs)))
{
return;
}
DataListBeginDragEventArgs dragArgs = (DataListBeginDragEventArgs)e.Data.GetData(
typeof(DataListBeginDragEventArgs));
sb = new StringBuilder("Dropped IDs: ");
// Use the data list's currency manager
CurrencyManager cm = dlList.ListManager;
// Just list the IDs of the selection
for (int idx = dragArgs.SelectionStart; idx <= dragArgs.SelectionEnd; idx++)
{
if (idx != dragArgs.SelectionStart)
{
sb.Append(',');
}
drv = (DataRowView)cm.List[idx];
sb.Append(drv["ID"]);
}
txtValue.Text = sb.ToString();
}
/// <summary>
/// Test drag and drop with the data list
/// </summary>
/// <param name="sender">The sender of the event</param>
/// <param name="e">The event arguments</param>
private void dlList_BeginDrag(object sender, DataListBeginDragEventArgs e)
{
// Commit any pending changes before the drag operation begins
dlList.CommitChanges();
this.DoDragDrop(e, DragDropEffects.Copy | DragDropEffects.Move);
}
/// <summary>
/// Only allow drop if over a row or a row header but not within the current selection
/// </summary>
/// <param name="sender">The sender of the event</param>
/// <param name="e">The event arguments</param>
private void dlList_DragOver(object sender, DragEventArgs e)
{
DataListBeginDragEventArgs dragArgs = (DataListBeginDragEventArgs)e.Data.GetData(
typeof(DataListBeginDragEventArgs));
DataListHitTestInfo hti = dragArgs.Source.HitTest(dlList.PointToClient(Cursor.Position));
if ((hti.Type & DataListHitType.RowOrHeader) != 0 && (hti.Row < dragArgs.SelectionStart ||
hti.Row > dragArgs.SelectionEnd))
{
e.Effect = DragDropEffects.Move;
}
else
{
e.Effect = DragDropEffects.None;
}
}
/// <summary>
/// Handle the drop operation. This doesn't do anything interesting yet.
/// </summary>
/// <param name="sender">The sender of the event</param>
/// <param name="e">The event arguments</param>
private void dlList_DragDrop(object sender, DragEventArgs e)
{
if (!e.Data.GetDataPresent(typeof(DataListBeginDragEventArgs)))
{
return;
}
DataListBeginDragEventArgs dragArgs = (DataListBeginDragEventArgs)e.Data.GetData(
typeof(DataListBeginDragEventArgs));
DataListHitTestInfo hti = dragArgs.Source.HitTest(dlList.PointToClient(Cursor.Position));
if ((hti.Type & DataListHitType.RowOrHeader) != 0 && (hti.Row < dragArgs.SelectionStart ||
hti.Row > dragArgs.SelectionEnd))
{
MessageBox.Show(String.Format("Selection dropped on row {0}", hti.Row + 1));
dlList.MoveTo(hti.Row);
dlList.Select(hti.Row, hti.Row, hti.Row);
}
}
