不用第归算法快速显示树，对于Oracle数据库(2)

{/// <summary>

    /// BQ_TreeView 的摘要说明

    /// </summary>

    public class BQ_TreeView : System.Windows.Forms.TreeView

    {

        private System.ComponentModel.Container components = null;

        private DataTable m_tb=null;

        private string m_RootMatID;

        BQ_TreeNode RootNode=null;

        ArrayList alNode=new ArrayList ();

        public BQ_TreeView()

        {

            InitializeComponent();

        }

        protected override void Dispose( bool disposing )

        {

            if( disposing )

            {

                if(components != null)

                {

                    components.Dispose();

                }

            }

            base.Dispose( disposing );

        }

        #region

        private void InitializeComponent()

        {

            components = new System.ComponentModel.Container();

        }

        #endregion

        /// <summary>

        ///定义数据源

        /// </summary>

        public DataTable TreeDataSource

        {

            set

            {

                m_tb=value;        

            }

        }

      &n

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