VS2010构建ASP.NET三层架构演示代码

项目代码简单显示一张表的记录，核心是掌握怎样构建基于三层架构的asp.net项目。

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

namespace Bll
{
    public class UserBll
    {
        public string getuserlist（）
        {
            Dal.UserDB db = new UserDB（）;
            return db.getlist（）;
        }
    }
}

 属性            大小     日期    时间   名称
----------- ---------  ---------- -----  ----
     目录           0  2014-04-18 21:17  Halfcool\
     目录           0  2014-04-18 21:41  Halfcool\Bll\
     目录           0  2014-04-18 21:41  Halfcool\Bll\bin\
     目录           0  2014-04-18 21:41  Halfcool\Bll\bin\Debug\
     文件        4096  2014-04-18 22:06  Halfcool\Bll\bin\Debug\Bll.dll
     文件       11776  2014-04-18 22:06  Halfcool\Bll\bin\Debug\Bll.pdb
     文件        5632  2014-04-18 22:06  Halfcool\Bll\bin\Debug\Dal.dll
     文件       13824  2014-04-18 22:06  Halfcool\Bll\bin\Debug\Dal.pdb
     文件        4608  2014-04-18 22:06  Halfcool\Bll\bin\Debug\Data.dll
     文件       11776  2014-04-18 22:06  Halfcool\Bll\bin\Debug\Data.pdb
     目录           0  2014-04-18 21:41  Halfcool\Bll\bin\Release\
     文件        2492  2014-04-18 21:49  Halfcool\Bll\Bll.csproj
     目录           0  2014-04-18 21:41  Halfcool\Bll\obj\
     目录           0  2014-04-18 21:41  Halfcool\Bll\obj\Debug\
     文件         376  2014-04-18 21:49  Halfcool\Bll\obj\Debug\Bll.csproj.FileListAbsolute.txt
     文件        4096  2014-04-18 22:06  Halfcool\Bll\obj\Debug\Bll.dll
     文件       11776  2014-04-18 22:06  Halfcool\Bll\obj\Debug\Bll.pdb
     文件        5614  2014-04-18 22:06  Halfcool\Bll\obj\Debug\DesignTimeResolveAssemblyReferencesInput.cache
     文件        6687  2014-04-18 22:06  Halfcool\Bll\obj\Debug\ResolveAssemblyReference.cache
     目录           0  2014-04-18 21:41  Halfcool\Bll\obj\Debug\TempPE\
     目录           0  2014-04-18 21:41  Halfcool\Bll\Properties\
     文件        1348  2014-04-18 21:41  Halfcool\Bll\Properties\AssemblyInfo.cs
     文件         304  2014-04-18 21:42  Halfcool\Bll\UserBll.cs
     目录           0  2014-04-18 21:34  Halfcool\Dal\
     目录           0  2014-04-18 21:34  Halfcool\Dal\bin\
     目录           0  2014-04-18 21:34  Halfcool\Dal\bin\Debug\
     文件        5632  2014-04-18 22:06  Halfcool\Dal\bin\Debug\Dal.dll
     文件       13824  2014-04-18 22:06  Halfcool\Dal\bin\Debug\Dal.pdb
     文件        4608  2014-04-18 22:06  Halfcool\Dal\bin\Debug\Data.dll
     文件       11776  2014-04-18 22:06  Halfcool\Dal\bin\Debug\Data.pdb
     文件        4608  2014-04-18 21:49  Halfcool\Dal\bin\Debug\Model.dll
............此处省略107个文件信息