private void ProjectTreeView_DragEnter(object sender, DragEventArgs e)
{
try
{
object MyData = e.Data.GetData(typeof(TreeNode));
//如果节点有数据，拖放目标允许移动
if (MyData != null)
{
e.Effect = DragDropEffects.Move;
}
else
{
e.Effect = DragDropEffects.None;
}
TreeView MyTreeView = (TreeView)sender;
TreeNode MyNode = MyTreeView.GetNodeAt(ProjectTreeView.PointToClient(new Point(e.X, e.Y)));
//if (MyNode != null)
//{ //改变进入节点的背景色
// MyNode.BackColor = Color.Blue;
// //保存此节点，进入下一个时还原背景色
// MyOldNode = MyNode;
//}
}
catch (SystemException ex)
{
return;
}
}
private void ProjectTreeView_DragDrop(object sender, DragEventArgs e)
{
TreeNode MyNode = (TreeNode)e.Data.GetData(typeof(TreeNode));
TreeView MyTreeView = (TreeView)sender;
//得到当前鼠标进入的节点
TreeNode MyTargetNode = MyTreeView.GetNodeAt(ProjectTreeView.PointToClient(new Point(e.X, e.Y)));
if (MyTargetNode != null)
{
TreeNode MyTargetParent = MyTargetNode.Parent;
//删除拖放的节点
if (MyNode == MyTargetNode)
{
return;
}
MyNode.Remove();
//添加到目标节点
MyTargetNode.Nodes.Add(MyNode);
//MyTargetNode.BackColor = Color.White;
MyTreeView.SelectedNode = MyTargetNode;
}
}