BLL/BookTypeBLL.cs

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using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using Model;
using DAL;
using System.Data;

namespace BLL
{
   public class BookTypeBLL
    {
       #region //添加图书类别
       public bool AddBookType(BookType bookType)
       {
           BookTypeDAL bookDAL = new BookTypeDAL();
           if (bookType.BookTypeId == "")
           {
               throw new System.Exception("类别编号不能为空，请确认！");
           }
           else if (bookType.BookTypeName == "")
           {
               throw new System.Exception("类别名称不能为空，请确认！");
           }
            BookType model = bookDAL.bookTypeCheck(bookType);
            if (model != null) {
                throw new System.Exception("该类别已存在，请确认！");
            }
            else
            {
                return bookDAL.AddBookType(bookType);
            }
       }
       #endregion
       #region //获取所有类别
       public DataTable getType()
       {
           BookTypeDAL bookTypeDAL = new BookTypeDAL();
           return bookTypeDAL.getType();
       }
       #endregion
       #region //根据条件查询
       public DataTable getTypeBy(string bookTypeId, string cobSelect)
       {
           BookTypeDAL bookTypeDAL = new BookTypeDAL();
           return bookTypeDAL.getTypeBy(bookTypeId, cobSelect);
       }
       #endregion
       #region//删除类别
       public bool BookTypeDel(string bookTypeId)
       {
           BookTypeDAL bookTypeDAL = new BookTypeDAL();
           return bookTypeDAL.BookTypeDel(bookTypeId);
       }
       #endregion
       #region //修改类别
       public bool BookTypeChange(BookType bookType)
       {
           BookTypeDAL bookTypeDAL = new BookTypeDAL();
           if (bookType.BookTypeName == "")