Bll/BCompany.cs

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

namespace Bll
{
    public class BCompany
    {
        DCompany idc = new DCompany();
        /// <summary>
        /// 分类下是否有内容
        /// </summary>
        /// <param name="NS_Id"></param>
        /// <returns></returns>
        public bool HasContent(int NS_Id)
        {
            return idc.HasContent(NS_Id);
        }
        /// <summary>
        /// 获取一个实体
        /// </summary>
        /// <param name="N_Id"></param>
        /// <returns></returns>
        public MCompany GetModel(int N_Id)
        {
            return idc.GetModel(N_Id);
        }
       /// <summary>
       /// 增加一条记录
       /// </summary>
       /// <param name="model"></param>
       /// <returns></returns>
        public string Add(MCompany model)
        {
            model.N_Id = idc.GetMaxId()+1;
            model.N_Order = idc.GetMaxOrder()+1;
            
            if (model.N_Name == string.Empty)
            {
                return "标题不能为空！";
            }
            idc.Add(model);
            return string.Empty;
        }
        /// <summary>
        /// 删除一条记录
        /// </summary>
        /// <param name="N_id"></param>
        public void Del(int N_id)
        {
            idc.Delete(N_id);
        }
        public string Mod(MCompany model)
        {
            if (model.N_Name == string.Empty)
            {