定義一個TreeView 名字為TVdepartment,設定allowdrop為True//行動程式碼
private void MiMoveUp_Click(object sender, EventArgs e) //向上移動
{
//by 閆磊 Email:Landgis@126.com,yanleigis@21cn.com 2007.10.10
TreeNode Node = TVdepartment.SelectedNode;
TreeNode PrevNode = Node.PrevNode;
if (PrevNode != null)
{
TreeNode NewNode = (TreeNode)Node.Clone();
if (Node.Parent == null)
{
TVdepartment.Nodes.Insert(PrevNode.Index, NewNode);
}
else
{
Node.Parent.Nodes.Insert(PrevNode.Index, NewNode);
}
Node.Remove();
TVdepartment.SelectedNode = NewNode;
}
}
private void MiMoveDown_Click(object sender, EventArgs e)//向下移動
{
//by 閆磊 Email:Landgis@126.com,yanleigis@21cn.com 2007.10.10
TreeNode Node = TVdepartment.SelectedNode;
TreeNode NextNode = Node.NextNode;
if (NextNode != null)
{
TreeNode NewNode = (TreeNode)Node.Clone();
if (Node.Parent == null)
{
TVdepartment.Nodes.Insert(NextNode.Index + 1, NewNode);
}
else
{
Node.Parent.Nodes.Insert(NextNode.Index + 1, NewNode);
}
Node.Remove();
TVdepartment.SelectedNode = NewNode;
}
}
//拖動代碼
private void TVdepartment_ItemDrag(object sender, ItemDragEventArgs e)//左鍵拖動
{
if (e.Button == MouseButtons.Left)
{
DoDragDrop(e.Item, DragDropEffects.Move);
}
}
private void TVdepartment_DragEnter(object sender, DragEventArgs e)
{
if (e.Data.GetDataPresent("System.Windows.Forms.TreeNode"))
{
e.Effect = DragDropEffects.Move;
}
else
{
e.Effect = DragDropEffects.None;
}
}
private void TVdepartment_DragDrop(object sender, DragEventArgs e)//拖動
{
//by 閆磊 Email:Landgis@126.com,yanleigis@21cn.com 2007.10.10
//獲得拖放中的節點
TreeNode moveNode = (TreeNode)e.Data.GetData("System.Windows.Forms.TreeNode");
//根據滑鼠座標確定要移動到的目標節點
Point pt;
TreeNode targeNode;
pt = ((TreeView)(sender)).PointToClient(new Point(e.X, e.Y));
targeNode = this.TVdepartment.GetNodeAt(pt);
//如果目標節點無子節點則添加為同級節點,反之添加到下級節點的未端
TreeNode NewMoveNode = (TreeNode)moveNode.Clone();
if (targeNode.Nodes.Count == 0)
{
targeNode.Parent.Nodes.Insert(targeNode.Index, NewMoveNode);
}
else
{
targeNode.Nodes.Insert(targeNode.Nodes.Count, NewMoveNode);
}
//更新當前拖動的節點選擇
TVdepartment.SelectedNode = NewMoveNode;
//展開目標節點,便於顯示拖放效果
targeNode.Expand();
//移除拖放的節點
moveNode.Remove();
}
