questioncontent.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.Collections.Generic;
using System.Text;

namespace ExaminationSystem.BLL.Domain
{
    public abstract class QuestionContent:DomainObject<long>
    {
        private string content;

        public virtual string Content
        {
            get { return content; }
            set { content = value; }
        }
        private string answer;

        public virtual string Answer
        {
            get { return answer; }
            set { answer = value; }
        }
        private Chapter chapter;

        public virtual Chapter Chapter
        {
            get { return chapter; }
            set { chapter = value; }
        }
        private Hard hard;

        public virtual Hard Hard
        {
            get { return hard; }
            set { hard = value; }
        }

        public abstract string QuestionType
        {
            get;
        }
        protected virtual string GetChoicesXML()
        {
            return "";
        }
        public virtual string GetContentXML()
        {
            StringBuilder builder = new StringBuilder(500);
            builder.Append("<" + QuestionType+ ">");
            builder.Append("<Content><![CDATA[" + Content + "]]></Content>");//builder.Append("<Content>" + Content + "</Content>");
            builder.Append("<Answer><![CDATA[" + Answer + "]]></Answer>");
            builder.Append(GetChoicesXML());
            builder.Append("</" + QuestionType + ">");

            return builder.ToString();
        }
        public override int GetHashCode()
        {
            return (GetType().FullName + "|" +
                Content.GetHashCode()).GetHashCode();
        }
    }
}