查找好多资料说用PreviewDrop和PreviewDragOver,PreviewDragOver能进入,但是PreviewDrop不能触发!
private void _value_PreviewDrop(object sender, DragEventArgs e)
{
MessageBox.Show("OK");
TreeViewItem item = e.OriginalSource as TreeViewItem;
string s = string.Empty;
JsonHeaderLogic c = item.DataContext as JsonHeaderLogic;
}
private void _value_PreviewDragOver(object sender, DragEventArgs e)
{
e.Effects = DragDropEffects.Copy;
e.Handled = true;
}