C# TreeView選單，MenuStrip選單遞迴動態生成例子

這是在許可權系統中設計中常用到的兩種選單處理方式

    private DataTable ModuleTable;

private void FrmMain_Load(object sender, EventArgs e)
        {

                try
                {
                    InitMenu();
                }
                catch
                {
                    MenuTree.Nodes.Clear();
                }

｝

    ///

        /// 初始化選單
        ///
        protected void InitMenu()
        {
            DataSet ds= new DataSet();
            ds=bll.GetModuleTypeList("");
            RGP.BLL.RGP_Modules bll = new RGP.BLL.RGP_Modules();
            ModuleTable = ds.Tables[0];  //取得所有資料得到DataTable

            //載入TreeView選單
            LoadNode(MenuTree.Nodes, "0");

            //載入MenuStrip選單
            ToolStripMenuItem topMenu = new ToolStripMenuItem();
            LoadSubMenu(ref topMenu, 0);

        }

        ///

        /// 遞迴建立TreeView選單(模組列表)
        ///
        /// 子選單
        /// 子選單上級ID
        protected void LoadNode(TreeNodeCollection node, string MtID)
        {
            DataView dvList = new DataView(ModuleTable);
            dvList.RowFilter = "ModuleTypeSuperiorID=" + MtID;  //過濾父節點
            TreeNode nodeTemp;
            foreach (DataRowView dv in dvList)
            {
                nodeTemp = new TreeNode();
                nodeTemp.Tag = dv["ModuleTypeID"].ToString() + ",0";
                nodeTemp.Text = dv["ModuleTypeName"].ToString();  //節點名稱
                node.Add(nodeTemp);  //加入節點
                //nodeTemp.SelectAction = TreeNodeSelectAction.Expand;
                //nodeTemp.Expanded = false;

                this.LoadNode(nodeTemp.Nodes, nodeTemp.Tag.ToString().Split(',')[0]);  //遞迴

                //增加子模組分類
                RGP.BLL.RGP_Modules bll = new RGP.BLL.RGP_Modules();
                DataSet Module = bll.GetModuleList("ModuleTypeID=" + dv["ModuleTypeID"].ToString());
                int i = 0;
                foreach (DataRow child_dr in Module.Tables[0].Rows)
                {
                    if ((UserBox.GetUserTable().IsLimit == true
                            || (child_dr["ModuleDisabled"].ToString().ToLower() == "true"
                            && UserHandle.ValidationModule(int.Parse(child_dr["ModuleID"].ToString()), RGP_Tag.Browse)))
                            && child_dr["IsMenu"].ToString().ToLower() == "true")
                    {
                        TreeNode ChildNode = new TreeNode(child_dr["ModuleName"].ToString());
                        ChildNode.Tag = child_dr["ModuleID"].ToString() + ",1";
                        ChildNode.Expand();
                        nodeTemp.Nodes.Add(ChildNode);
                        i++;
                    }
                }

                //刪除不必要的模組分類節點。
                if (i == 0)
                {
                    MenuTree.Nodes.Remove(nodeTemp);
                }
            }
        }

        ///

        /// 遞迴建立MenuStrip選單(模組列表)
        ///
        /// 父選單項
        /// 父選單的ID
        private void LoadSubMenu(ref ToolStripMenuItem topMenu, int MtID)
        {
            DataView dvList = new DataView(ModuleTable);
            //過濾出當前父選單下在所有子選單資料(僅為下一層的)
            dvList.RowFilter = "ModuleTypeSuperiorID=" + MtID.ToString();
            ToolStripMenuItem subMenu;
            foreach (DataRowView dv in dvList)
            {
                //建立子選單項
                subMenu = new ToolStripMenuItem();
                subMenu.Text = dv["ModuleTypeName"].ToString();
                //判斷是否為頂級選單
                if (MtID == 0)
                {
                    this.SysMainMenu.Items.Add(subMenu);
                }
                else
                {
                    topMenu.DropDownItems.Add(subMenu);
                }

                //遞迴呼叫
                LoadSubMenu(ref subMenu, Convert.ToInt32(dv["ModuleTypeID"]));

                //增加子模組分類
                RGP.BLL.RGP_Modules bll = new RGP.BLL.RGP_Modules();
                DataSet Module = bll.GetModuleList("ModuleTypeID=" + dv["ModuleTypeID"].ToString());
                int i = 0;
                foreach (DataRow child_dr in Module.Tables[0].Rows)
                {
                    if ((UserBox.GetUserTable().IsLimit == true
                            || (child_dr["ModuleDisabled"].ToString().ToLower() == "true"
                            && UserHandle.ValidationModule(int.Parse(child_dr["ModuleID"].ToString()), RGP_Tag.Browse)))
                            && child_dr["IsMenu"].ToString().ToLower() == "true")
                    {
                        ToolStripMenuItem ChildMenu = new ToolStripMenuItem(child_dr["ModuleName"].ToString());
                        subMenu.DropDownItems.Add(ChildMenu);
                        i++;
                    }
                }

                //刪除不必要的模組分類節點。
                if (i == 0)
                {
                    this.SysMainMenu.Items.Remove(subMenu);
                }
            }
        }

來自 “ ITPUB部落格 ” ，連結：http://blog.itpub.net/12639172/viewspace-589269/，如需轉載，請註明出處，否則將追究法律責任。

C# TreeView選單，MenuStrip選單遞迴動態生成例子

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