CRM之菜单管理（三）

 1         /// <summary> 创建一个TreeNode,定义Tag,Name,Text
 2         /// </summary>
 3         /// <returns></returns>
 4         public static TreeNode CreateTreeNode()
 5         {
 6             TreeNode node = new TreeNode();
 7             node.Name = "new_" + Guid.NewGuid().ToString();
 8             node.Tag = 0;
 9             node.Text = "请输入菜单名称";
10             return node;
11         }    

 1         /// <summary> 双击TreeView中的某个Node，该node允许编辑，同时dataGridView中该node的记录高亮
 2         /// </summary>
 3         /// <param name="sender"></param>
 4         /// <param name="e"></param>
 5         private void treeViewMenu_NodeMouseDoubleClick(object sender, TreeNodeMouseClickEventArgs e)
 6         {
 7             //获取该节点的ID_
 8                       
 9             int id = Convert.ToInt32(treeViewMenu.SelectedNode.Tag);
10             int index = BLMenu.GetIndexByID(id);
11             dataGridViewMenu.CurrentCell = dataGridViewMenu.Rows[index].Cells[0];
12             dataGridViewMenu.Rows[index].Selected = true;
13             treeViewMenu.LabelEdit = true;
14         }    

 1         /// <summary> 选择dataGridView中的某行，使其对应的Node节点高亮
 2         /// </summary>
 3         /// <param name="sender"></param>
 4         /// <param name="e"></param>
 5         private void dataGridViewMenu_RowEnter(object sender, DataGridViewCellEventArgs e)
 6         {
 7             treeViewMenu.Focus();
 8             treeViewMenu.ExpandAll();
 9             int rowid = e.RowIndex;
10             int id = Convert.ToInt32(dataGridViewMenu.Rows[rowid].Cells[9].Value);
11             TreeNode node = searchNodeById(id, treeViewMenu.Nodes);
12             treeViewMenu.SelectedNode = node;
13         }

 1         /// <summary> 在用鼠标将某项拖动到该控件的工作区时发生   
 2         /// </summary>
 3         /// <param name="sender"></param>
 4         /// <param name="e"></param>
 5         private void treeViewMenu_DragEnter(object sender, DragEventArgs e)
 6         {
 7             if (e.Data.GetDataPresent(typeof(TreeNode)))
 8                 e.Effect = DragDropEffects.Move;
 9             else
10                 e.Effect = DragDropEffects.None;
11         }
12 
13         /// <summary> 在用户开始拖动项时发生
14         /// </summary>
15         /// <param name="sender"></param>
16         /// <param name="e"></param>
17         private void treeViewMenu_ItemDrag(object sender, ItemDragEventArgs e)
18         {
19             if (e.Button == MouseButtons.Left)
20             {
21                 DoDragDrop(e.Item, DragDropEffects.Move);
22             }
23         }
24 
25         /// <summary> 在用户拖动完成时发生
26         /// </summary>
27         /// <param name="sender"></param>
28         /// <param name="e"></param>
29         private void treeViewMenu_DragDrop(object sender, DragEventArgs e)
30         {
31             try
32             {
33                 TreeNode currentNode = null, targetNode;
34                 if (e.Data.GetDataPresent(typeof(TreeNode)))
35                     currentNode = (TreeNode)(e.Data.GetData(typeof(TreeNode)));
36                 if (currentNode == null)
37                     return;
38                 // 找到目标节点
39                 Point pt = ((TreeView)sender).PointToClient(new Point(e.X, e.Y));
40                 targetNode = this.treeViewMenu.GetNodeAt(pt);
41 
42                 #region 移动节点
43                 if (targetNode != null
44                     && targetNode.Parent != currentNode
45                     && targetNode != currentNode)
46                 {
47                     TreeNode tempNode = currentNode;
48                     if (pt.X < 30 && targetNode.Parent == currentNode.Parent)
49                     {
50                         #region 同级移动顺序
51                         if (targetNode.Parent != null)
52                         {
53                             currentNode.Remove();
54                             targetNode.Parent.Nodes.Insert(targetNode.Index, tempNode);
55                         }
56                         #endregion
57                     }
58                     else
59                     {
60                         #region 同级或跨节点移动
61                         //if (currentNode.Parent != null && currentNode.Parent.Nodes.Count == 1)
62                         //{
63                         //    currentNode.Parent.ImageIndex = 2;
64                         //    currentNode.Parent.SelectedImageIndex = currentNode.Parent.ImageIndex;
65                         //}
66                         currentNode.Remove();
67                         targetNode.Nodes.Add(tempNode);
68                         //targetNode.ImageIndex = 0;
69                         //targetNode.SelectedImageIndex = targetNode.ImageIndex;
70                         #endregion
71                     }
72                 }
73                 #endregion
74 
75                 #region 拖至根节点
76                 if (targetNode == null)
77                 {
78                     TreeNode tempNode = currentNode;
79                     //if (currentNode.Parent != null
80                     //    && currentNode.Parent.Nodes.Count == 1)
81                     //{
82                     //    currentNode.Parent.ImageIndex = 2;
83                     //    currentNode.Parent.SelectedImageIndex = currentNode.Parent.ImageIndex;
84                     //}
85                     currentNode.Remove();
86                     treeViewMenu.Nodes.Add(tempNode);
87                 }
88                 #endregion
89             }
90             catch (Exception ex)
91             {
92                 MessageBox.Show("Error:" + ex.ToString(), "错误提示：", MessageBoxButtons.OK, MessageBoxIcon.Error);
93             } 
94         }