基于asp.net的webmenu的数据操作4

程序代码如下：
using System;
using System.Collections;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Web;
using System.Web.SessionState;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.HtmlControls;
using System.Data.OleDb;

namespace WebApplication6
{
/// <summary>
/// WebForm1 的摘要说明。
/// </summary>
public class WebForm1 : System.Web.UI.Page
{
protected Coalesys.webmenu.webmenu csnetMenu;

private void Page_Load(object sender, System.EventArgs e)
{
// 在此处放置用户代码以初始化页面
csnetMenu.MenuBar.AbsoluteDockEnabled = false;
csnetMenu.MenuBar.AbsoluteDragEnabled = false;
csnetMenu.MenuBar.BackgroundColor = "";
csnetMenu.MenuBar.OuterHighlightColor = "#666666";
csnetMenu.MenuBar.OuterShadowColor = "#666666";
csnetMenu.MenuBar.InnerShadowColor = "#F9F8F7";
csnetMenu.MenuBar.HoverColor = "#dfdfdf";
csnetMenu.MenuBar.SelectedColor = "#B6BDD2";
csnetMenu.MenuBar.SelectedTextColor = "#000000";
csnetMenu.BackgroundColor = "";
csnetMenu.SelectedColor = "#B6BDD2";
csnetMenu.OuterHighlightColor = "#c0c0c0";
csnetMenu.OuterShadowColor = "#c0c0c0";
csnetMenu.InnerShadowColor = "#808080";
csnetMenu.PopupIcon = "./images/arrow-black.gif";
csnetMenu.SelectedPopupIcon = "./images/arrow-white.gif";
csnetMenu.ClearPixelImage = "./images/clearpixel.gif";

// Populate webmenu
LoadwebmenuData(csnetMenu);
}

//=============================================================================
// LoadwebmenuData - load webmenu from database
//
// input:
// cswebmenu - [in] Coalesys.webmenu.webmenu object
//
// output:
// none
//
public void LoadwebmenuData(Coalesys.webmenu.webmenu cswebmenu)
{
Coalesys.webmenu.Group csMenuGroup;

// database info
string dbConnString = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=";
string dbPathString = Server.MapPath("./SelfReferencedTable.mdb");
string dbSqlString = "SELECT * FROM Nodes ORDER BY ID";

// Initiate OleDb interface
OleDbConnection dbConn = new OleDbConnection(dbConnString + dbPathString);
OleDbCommand dbComm = new OleDbCommand(dbSqlString, dbConn);
OleDbDataAdapter dbAdapter = new OleDbDataAdapter();

dbConn.Open();

// Fill an ADO.net DataSet
DataSet ds = new DataSet();
dbAdapter.SelectCommand = dbComm;
dbAdapter.Fill(ds, "MenuItems");

dbConn.Close();

// Create the data relation between the ID and Parent_ID columns of the MenuItems table.
// (this is the key to hierarchical navigating in a self-referencing table).
DataRelation dr = ds.Relations.Add("MenuItemHierarchy",
ds.Tables["MenuItems"].Columns["ID"],
ds.Tables["MenuItems"].Columns["Parent_ID"]);

// Start top-down navigation of the MenuItem rows.
foreach(DataRow dbMenuItem in ds.Tables["MenuItems"].Rows)
{
// If the Parent_ID colum is null, then this is a root menu item.
if(dbMenuItem.IsNull("Parent_ID"))
{
// Create a menu group for the root menu item
csMenuGroup = cswebmenu.Groups.Add();
csMenuGroup.Caption = dbMenuItem["Caption"].ToString();

// execute the recursive function to populate all it's children.
AddMenuItems(dbMenuItem.GetChildRows(dr), dr, csMenuGroup);
}
}
}

//=============================================================================
// AddMenuItems - Recursive function to populate hierarchical Menu Items
// from data rows that have parent/child relationships.
//
// input:
// dataRows - [in] Child Rows
// dataRel - [in] Data Relation
// webmenuGroup - [in] webmenu Group
//
// output:
// none
//
public void AddMenuItems(DataRow[] dataRows, DataRelation dataRel, Coalesys.webmenu.Group webmenuGroup)
{
Coalesys.webmenu.Item csMenuItem;
Coalesys.webmenu.Group csNestedMenuGroup;
DataRow[] drChildren;

foreach(DataRow dbMenuItem in dataRows)
{
csMenuItem = webmenuGroup.Items.Add();
csMenuItem.Caption = dbMenuItem["Caption"].ToString();
csMenuItem.URL = dbMenuItem["URL"].ToString();
if (dbMenuItem["Enable"].ToString()=="True" )
{
csMenuItem.Enabled=true;
}
else
{
csMenuItem.Enabled=false;
}

// check if this Item has children of it's own
drChildren = dbMenuItem.GetChildRows(dataRel);
// if so, create a group for the children and reenter this function.
if(drChildren.Length > 0)
{
csNestedMenuGroup = csMenuItem.AddGroup();
AddMenuItems(drChildren, dataRel, csNestedMenuGroup);
}
}
}

}

效果图如下：