treeView 展开结点

Question

treeView.ExpandAll();
添加上面代码后，treeView还是没有展开，是怎么回事？

Answer 1

 /// <summary>
        /// 初始树根节点
        /// </summary>
        private void InitTreeView()
        {            this.treeView.Nodes.Clear();
            OTMS.SysModuleDataSetTableAdapters.TbModuleTableAdapter AD = new OTMS.SysModuleDataSetTableAdapters.TbModuleTableAdapter();            _dtblModule = AD.GetData();
            DataRow[] drAry = _dtblModule.Select(_dtblModule.strParentModuleCodeColumn.ColumnName + "='0'");
            TreeNode trn = new TreeNode();
            trn.Text = drAry[0][_dtblModule.strModuleNameColumn.ColumnName].ToString();            trn.Name = drAry[0][_dtblModule.strModuleCodeColumn.ColumnName].ToString();
            
            this.treeView.Nodes.Add(trn);            CreateTreeView(trn, trn.Name);
            
        }

Answer 2

在 InitTreeView() 
方法后面加 treeView.ExpandAll(); 看看.

Answer 3

        /// <summary>
        /// 构建树
        /// </summary>
        /// <param name="trn">树节点</param>
        /// <param name="strParentNodeCode">父节点编码</param>
        private void CreateTreeView(TreeNode trn, string strParentNodeCode)
        {
            DataRow[] drAry = _dtblModule.Select(_dtblModule.strParentModuleCodeColumn.ColumnName + "='" + strParentNodeCode + "'");            for (int nIndex = 0; nIndex < drAry.Length; nIndex++)
            {
                //“公共”模块不参与权限控制
                if ("权限控制" == drAry[nIndex][_dtblModule.strMduCommonColumn.ColumnName].ToString())
                {
                    OTMS.VwRolePowerDataSetTableAdapters.QueriesTableAdapter bs = new OTMS.VwRolePowerDataSetTableAdapters.QueriesTableAdapter();
                    object obj = bs.GetRolePowerCount(drAry[nIndex][_dtblModule.strModuleCodeColumn.ColumnName].ToString(), base.RoleCode.ToString());
                    ////如果此角色拥有该模块的功能数为0，则不显示此菜单
                    //object obj = new perVwRolePowerTableAdapter().GetRolePowerCount(drAry[nIndex][_dtblModule.strModuleCodeColumn.ColumnName].ToString(), base.UserRoleCode);
                    if (0 == Convert.ToInt32(obj))
                    {
                        continue;
                    }                }
                TreeNode trnChild = new TreeNode();
                trnChild.Text = drAry[nIndex][_dtblModule.strModuleNameColumn.ColumnName].ToString();//得到结点的名称
                trnChild.Name = drAry[nIndex][_dtblModule.strModuleCodeColumn.ColumnName].ToString();//得到结点的编号                trn.Nodes.Add(trnChild);                CreateTreeView(trnChild, trnChild.Name);
               
                
            }        }

Answer 4

在你绑定完树节点后面加上treeView.ExpandAll(); 

Answer 5

trn.Nodes.Add(trnChild);
     treeView.ExpandAll();
                CreateTreeView(trnChild, trnChild.Name); 

Answer 6

在Form_Load中加入 treeView.ExpandAll(); 
而不是在构造函数中加, 试一下