11-数据访问层

public class NewsDal
{
DBcontext db = new DBcontext();

/// <summary>
/// 查看发布的所有信息
/// </summary>
/// <returns></returns>
public List<News> GetNews()
{

return db.News.ToList();
}
/// <summary>
/// 添加发布信息
/// </summary>
/// <param name="n"></param>
/// <returns></returns>
public int AddNews(News n)
{
db.News.Add(n);
return db.SaveChanges();
}
/// <summary>
/// 根据ID查一个
/// </summary>
/// <param name="id"></param>
/// <returns></returns>
public News GetNew(int id)
{
return db.News.FirstOrDefault(n => n.ID.Equals(id));
}
/// <summary>
/// 修改发布信息
/// </summary>
/// <param name="n"></param>
/// <returns></returns>
public int UptNew(News n)
{
db.Entry(n).State = System.Data.Entity.EntityState.Modified;
return db.SaveChanges();
}
}

public class CommentDAL
{
DBcontext db = new DBcontext();
/// <summary>
/// 显示评论信息
/// </summary>
/// <returns></returns>
public List<Comment> GetComments()
{
return db.Comments.ToList();
}
/// <summary>
/// 添加评论信息
/// </summary>
/// <param name="c"></param>
/// <returns></returns>
public int AddComment(Comment c)
{
db.Comments.Add(c);
return db.SaveChanges();
}

}