chapternode.cs

本在线考试系统采用了面向对象的分析和设计

using System;
using System.Data;
using System.Configuration;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using ExaminationSystem.BLL.Domain;
using ExaminationSystem.BLL.Service;
using System.Collections.Generic;

/// <summary>
/// ChapterNode 的摘要说明
/// </summary>
public class ChapterNode:ITreeNode
{
    private Chapter chapter;
    private long subjectId=0;
    public ChapterNode(long subjectId)
    {
        this.subjectId=subjectId;
    }
    public ChapterNode(Chapter chapter)
    {
        this.chapter=chapter;

    }
    public ITreeNode Parent
    {
        get { return new ChapterNode(this.chapter.Parent);}
    }
    public IList<ITreeNode> Children
    {
        get 
        { 
            IList<ITreeNode> children=new List<ITreeNode>();      
            foreach (Chapter childChapter in chapter.Children)
            {
            children.Add(new ChapterNode(childChapter));
            }
            return children; 
        }
    }
    public string Name
    {
        get { return this.chapter.Name; }
    }
    public long ID
    {
        get { return this.chapter.ID; }
    }
    public  IList<ITreeNode> GetTopNodes()
    {
        Subject subject = new SubjectService().GetById(subjectId);
       IList<Chapter> chapters = subject.Chapters;
        IList<ITreeNode> topChapterNodes = new List<ITreeNode>();
        foreach (Chapter chapter in chapters)
        {
            if (chapter.Parent == null)
                topChapterNodes.Add(new ChapterNode(chapter));
        }
        return topChapterNodes;
    }
}