public BlogQuestionRepository()
{
#region 初始化问题集合
this._questions = new HashSet <BlogQuestion>();
this._newQ = new HashSet <BlogQuestion>();
this._modifiedQ = new HashSet <BlogQuestion>();
this._removedQ = new HashSet <BlogQuestion>();
#endregion
#region 初始化答案集合
this._answerDic = new Dictionary <Guid, HashSet <BlogAnswer> >();
this._newanswerDic = new Dictionary <Guid, HashSet <BlogAnswer> >();
this._modifiedanswerDic = new Dictionary <Guid, HashSet <BlogAnswer> >();
this._removedanswerDic = new Dictionary <Guid, HashSet <BlogAnswer> >();
#endregion
//初始化加载问题集合
this._questions = BlogQuestionPersist.GetAllQuestions();
}
public IList <BlogQuestion> FetchQuestions(int startIndex, int count, Guid categoryId)
{
return(BlogQuestionPersist.GetList(categoryId, startIndex, count));
}
public void PersistAll()
{
#region 转换成DataTable
//新添加元素
DataTable newQuestionsTable = new DataTable("NewQuestions");
DataTable newAnswersTable = new DataTable("NewAnswers");
//修改过的元素
DataTable modifiedQuestionsTable = new DataTable("ModifiedQuestions");
//被删除的元素
DataTable removedQuestionsTable = new DataTable("RemovedQuestions");
//新博文
foreach (BlogQuestion q in this._newQ)
{
q.AlterToRow(newQuestionsTable);
}
//新回复
foreach (Guid id in this._newanswerDic.Keys)
{
foreach (BlogAnswer a in this._newanswerDic[id])
{
a.AlterToRow(newAnswersTable);
}
}
//更新的博文
foreach (BlogQuestion q in this._modifiedQ)
{
q.AlterToRow(modifiedQuestionsTable);
}
//删除的博文
foreach (BlogQuestion q in this._removedQ)
{
q.AlterToRow(removedQuestionsTable);
}
#endregion
#region 持久化
//添加
BlogQuestionPersist.AddAll(newQuestionsTable);
BlogQuestionPersist.AnswerToQuestion(newAnswersTable);
//更新
BlogQuestionPersist.UpdateAll(modifiedQuestionsTable);
//删除
//BlogQuestionPersist.RemoveAll(removedQuestionsTable);
#endregion
#region 释放内存
this._newQ.Clear();
this._newanswerDic.Clear();
this._removedQ.Clear();
this._modifiedQ.Clear();
#endregion
}
