public bool tryFind(int id, out BookEvaluaion res)
{
if (Data.Count == 0)
{
res = null; return(false);
}
var result = from book in Data
where book.BookID == id
select book;
if (result.Count() == 0)
{
res = null; return(false);
}
res = result.First();
return(true);
}
/// <summary>
/// 标准构造函数
/// </summary>
/// <param name="info">教材属性</param>
/// <param name="value">教材评价</param>
public BookFinal(BookDetail info, BookEvaluaion value)
{
MainInfo = info;
MainValue = value;
}
public void ReplaceTo(int id, BookEvaluaion item)
{
var result = from book in Data
where book.BookID == id
select book = item.Clone();
}
public void Add(BookEvaluaion item)
{
Data.Add(item);
}