顯示DataTable的 TreeView 控件

最近編程總要用到，所以簡單封裝了一個控件．

各參數說明如下，索引列表明生成tree結構的索引，而級別表示第幾級，每級編碼長度是一個輔助值，如

１，２，３級編碼長度為2,1,3那麼對索引列1,101,102,101001,101002,101003生成的樹如下

１的子結點為101,102,101的子結點為101001,101002,101003

程序中已經將TreeVIEw 的MouseClick事件甩出

而且，對於dataTable的每一列，都存在對應的TNode 的Tag中，應用時只要轉換一下就行了

感覺封裝性不是太好

歡迎拍磚

 

  public delegate  void NodeMouseClick(object sender, TreeNodeMouseClickEventArgs e);

    public partial class CertiRuleVIEw : UserControl 
    ...{

   
        private String _indexCol;   //索引列
        private String _levelCol;   //級別列
        private String _showCol;    //顯示列
        private String _valueCol;   //值列
        private String _levelLengthCol;//該級編碼長度
        private DataTable _table;   //數據表
        private NodeMouseClick _mouseClick; //鼠標事件
       


        /**//// <summary>
        /// MouseClick 事件，可以將單擊結點的事件傳出
        /// </summary>
        public new event NodeMouseClick MouseClick
        ...{
            add
            ...{
                this._mouseClick += new NodeMouseClick(value);
            }
            remove
            ...{
                this._mouseClick -= new NodeMouseClick(value);
            }
        }


        /**//// <summary>
        /// 表示各級編碼長度的列
        /// </summary>
        public String LevelLengthCol
        ...{
            get
            ...{
                return _levelLengthCol;
              
            }
            set
            ...{
               
                if ( _table==null || _table.Columns.Contains(value))
                    _levelLengthCol = value;
                else
                    throw new Exception("要設定的列不存在!");
            }
        }

        /**//// <summary>
        /// 要顯示的表
        /// </summary>
        public DataTable Table
              ...{
            get
            ...{
                return _table;
            }
            set
            ...{
                _table = value;
            }
        }

        /**//// <summary>
        /// 表的索引列
        /// </summary>
        public String IndexCol
        ...{
       get
            ...{
                return _indexCol;
            }
            set
            ...{

                if (_table==null ||_table.Columns.Contains(value))
                    _indexCol = value;
                else
                    throw new Exception("給定的列並不存在!");
            }
        }
        /**//// <summary>
        /// 表示級別的列
        /// </summary>
        public String LevelCol
        ...{
            get
            ...{
                return _levelCol;
            }
            set
            ...{
                if (_table == null || _table.Columns.Contains(value))
                    _levelCol = value;
                else
                    throw new Exception("給定的列並不存在!");
            }
        }


        /**//// <summary>
        /// 要顯示在結點上的列
        /// </summary>
        public String ShowCol
        ...{
            get
            ...{
                return _showCol;
            }
            set
            ...{
                if (_table == null || _table.Columns.Contains(value))
                    _showCol = value;
                else
                    throw new Exception("給定的列並不存在!");
            }
        }
        /**//// <summary>
        /// 用來索引的列
        /// </summary>
          public String ValueCol...{
            get...{
                return _valueCol;
            }
            set...{
                if (_table == null || _table.Columns.Contains(value ))
                    _valueCol = value;
                else
                    throw new Exception ("給定的列並不存在!");
            }
        }

        /**//// <summary>
        /// 得到TreeVIEw的實例
        /// </summary>
        public TreeVIEw Tree
              ...{
            get
            ...{
                return treeVIEw1;
            }
        }

       
        public CertiRuleVIEw()
        ...{
            InitializeComponent();
           
        }


        /**//// <summary>
        /// 初始化結點
        /// </summary>
        public void Init()
...{
            DataRow[] listRows = _table.Select(null, _indexCol + " ASC");
            TreeNodeCollection p = this.treeVIEw1.Nodes;
            TreeNode node;
            TreeNode current;
            String key;
            int length;
            int index;
            List<TreeNode> T;
            T = new List<TreeNode>();
            foreach (DataRow row in listRows)
            ...{
                node = new TreeNode(row[_showCol].ToString()+":"+row[_valueCol].ToString());
                
                node.Tag = row;
                key = row[_indexCol].ToString();
                node.Name = key;
                length = System.Convert.ToInt32(row[_levelLengthCol].ToString());
                key = key.Substring(0, key.Length - length);
                if (treeVIEw1.Nodes.Count == 0)
                    treeVIEw1.Nodes.Add(node);
                else...{
                    foreach (TreeNode childnode in this.treeVIEw1.Nodes)
                    ...{
                        T.Add(childnode);
                        
                    }
                    while (T.Count > 0)
                    ...{
                        current = T[0];
                        T.Remove(current);
                        if (current.Name == key)
                        ...{

                            current.Nodes.Add(node);
                            node = null;
                            break;
                        }
                        else
                        ...{
                            if(current.Nodes.Count > 0)
                            foreach (TreeNode child in current.Nodes)
                            ...{
                                T.Add(child);
                            }
                        }
                    }
                    if(node != null)
                        treeVIEw1.Nodes.Add(node);
                    }
                
                
   &nbsp;        }
        }

        private void treeVIEw1_NodeMouseClick(object sender, TreeNodeMouseClickEventArgs e)
        ...{
            if (_mouseClick != null)
                _mouseClick(sender, e);

        }
    }