protected bool TreeNodeContains(TreeNode treeNode, IDataDefinitionExport obj)
{
IDataDefinitionExport tag = treeNode.Tag as IDataDefinitionExport;
if (tag != null && tag.Equals(obj))
{
return(true);
}
foreach (TreeNode node in treeNode.Nodes)
{
if (TreeNodeContains(node, obj))
{
return(true);
}
}
return(false);
}
private void lbxExports_DragOver(object sender, DragEventArgs e)
{
IDataDefinitionExport draggedItem = e.Data.GetData(typeof(IDataDefinitionExportImpl)) as IDataDefinitionExport;
if (draggedItem == null)
{
e.Effect = DragDropEffects.None;
return;
}
foreach (IDataDefinitionExport lbi in lbxExports.Items)
{
if (draggedItem.Equals(lbi))
{
e.Effect = DragDropEffects.None;
return;
}
}
e.Effect = DragDropEffects.Copy;
}