无限级TreeView导航

 

 

using System;
using System.Collections;
using System.Configuration;
using System.Data;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;

namespace GlistenCD.AdminUI.Uc
...{
    public partial class LeftNavgationBar : System.Web.UI.UserControl
    ...{
        private DataTable _navgationDataTable;
        public DataTable NavgationDataTable
        ...{
            set
            ...{
                if (value != null)
                ...{
                    _navgationDataTable = value;
                    InitTree();
                }
            }
        }
        protected void Page_Init(object sender, EventArgs e)
        ...{
        }

        private void InitTree()
        ...{
            int max = Int32.Parse(_navgationDataTable.Rows[0]["NavgationParent"].ToString());         
            for (int i = 0; i < _navgationDataTable.Rows.Count; i++)
            ...{                
                if (max < Int32.Parse(_navgationDataTable.Rows[i]["NavgationParent"].ToString()))
                ...{
                    max = Int32.Parse(_navgationDataTable.Rows[i]["NavgationParent"].ToString());                    
                }
            }
            TreeNode rt = new TreeNode();
            rt.Text = "Home";
            AddChildNode(0, rt, max);
            NavTree.Nodes.Add(rt);
        }

        private void AddChildNode(int parentID, TreeNode ParentNode,int max)
        ...{
            for (int i = 0; i < _navgationDataTable.Rows.Count; i++)
            ...{                
                if (Int32.Parse(_navgationDataTable.Rows[i]["NavgationParent"].ToString()) == parentID)
                ...{                    
                    TreeNode tn = new TreeNode();
                    tn.Text = _navgationDataTable.Rows[i]["NavgationTitle"].ToString();
                    tn.Value = _navgationDataTable.Rows[i]["NavgationID"].ToString();
                    tn.NavigateUrl = _navgationDataTable.Rows[i]["NavgationUrl"].ToString();
                    tn.ToolTip = _navgationDataTable.Rows[i]["NavgationTip"].ToString();
                    tn.Expanded = false;
                    ParentNode.ChildNodes.Add(tn);

                    if (Int32.Parse(_navgationDataTable.Rows[i]["NavgationParent"].ToString()) < max)
                        AddChildNode(Int32.Parse(tn.Value), tn, max);                    
                }
            }
        }

    }
}