显示DataTable的 TreeView 控件

最近编程总要用到，所以简单封装了一个控件．

各参数说明如下，索引列表明生成tree结构的索引，而级别表示第几级，每级编码长度是一个辅助值，如

１，２，３级编码长度为2,1,3那么对索引列1,101,102,101001,101002,101003生成的树如下

１的子结点为101,102,101的子结点为101001,101002,101003

程序中已经将TreeView 的MouseClick事件甩出

而且，对于dataTable的每一列，都存在对应的TNode 的Tag中，应用时只要转换一下就行了

感觉封装性不是太好

欢迎拍砖

 

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

    public partial class CertiRuleView : UserControl 
    ...{

   
        private String _indexCol;   //索引列
        private String _levelCol;   //级别列
        private String _showCol;    //显示列
        private String _valueCol;   //值列
        private String _levelLengthCol;//该级编码长度
        private DataTable _table;   //数据表
        private NodeMouseClick _mouseClick; //鼠标事件
       


        /**//// <summary>
        /// MouseClick 事件，可以将单击结点的事件传出
        /// </summary>
        public new event NodeMouseClick MouseClick
        ...{
            add
            ...{
                this._mouseClick += new NodeMouseClick(value);
            }
            remove
            ...{
                this._mouseClick -= new NodeMouseClick(value);
            }
        }


        /**//// <summary>
        /// 表示各级编码长度的列
        /// </summary>
        public String LevelLengthCol
        ...{
            get
            ...{
                return _levelLengthCol;
              
            }
            set
            ...{
               
                if ( _table==null || _table.Columns.Contains(value))
                    _levelLengthCol = value;
                else
                    throw new Exception("要设定的列不存在!");
            }
        }

        /**//// <summary>
        /// 要显示的表
        /// </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("给定的列并不存在!");
            }
        }
        /**//// <summary>
        /// 表示级别的列
        /// </summary>
        public String LevelCol
        ...{
            get
            ...{
                return _levelCol;
            }
            set
            ...{
                if (_table == null || _table.Columns.Contains(value))
                    _levelCol = value;
                else
                    throw new Exception("给定的列并不存在!");
            }
        }


        /**//// <summary>
        /// 要显示在结点上的列
        /// </summary>
        public String ShowCol
        ...{
            get
            ...{
                return _showCol;
            }
            set
            ...{
                if (_table == null || _table.Columns.Contains(value))
                    _showCol = value;
                else
                    throw new Exception("给定的列并不存在!");
            }
        }
        /**//// <summary>
        /// 用来索引的列
        /// </summary>
        public String ValueCol...{
            get...{
                return _valueCol;
            }
            set...{
                if (_table == null || _table.Columns.Contains(value ))
                    _valueCol = value;
                else
                    throw new Exception ("给定的列并不存在!");
            }
        }

        /**//// <summary>
        /// 得到TreeView的实例
        /// </summary>
        public TreeView Tree
        ...{
            get
            ...{
                return treeView1;
            }
        }

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


        /**//// <summary>
        /// 初始化结点
        /// </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);
                    }
                
                
            }
        }

        private void treeView1_NodeMouseClick(object sender, TreeNodeMouseClickEventArgs e)
        ...{
            if (_mouseClick != null)
                _mouseClick(sender, e);

        }
    }