三层架构 问题求指点！！在线等 ！！谢谢！！

[简单DE生活]

MODELS层：ROOM.CS:
public class Room
{
public Room() { }

private int roomId;
public int RoomId
{
get { return roomId; }
set { roomId = value; }
}

----------------------------------------------------------------------
DAL层：RoomService.CS：
public int AddRoom(Room room)
{
string sql = "insert into Room(RoomId)" + " values(@RoomId)";
sql += " ;
SqlParameter[] para = new SqlParameter[]
{
new SqlParameter("@RoomId",room.RoomId）
};
return DBHelper.GetScalar(sql, para);
}
--------------------------------------------------------------------------------
错误：
错误 1 “HotelModels.Room”不可访问，因为它受保护级别限制
错误 2 可访问性不一致: 参数类型“HotelModels.Room”比方法“HotelDAL.RoomService.AddRoom(HotelModels.Room)”的可访问性低


我上网去查 说是要加public
我读写器前都有public就是不知道还哪里加public

还有错误2 没查到 ！！
求指点！

[Peter200694013]

是否有实现接口？

[简单DE生活]

没啊？
MODELS层：ROOM.CS:
public class Room
{
public Room() { }
}

using Models；
public int AddRoom(Room room)
{
string sql = "insert into Room(RoomId)" + " values(@RoomId)";
sql += " ;
SqlParameter[] para = new SqlParameter[]
{
new SqlParameter("@RoomId",room.RoomId）
};
return DBHelper.GetScalar(sql, para);
}

就这样 调用 我这里没接口啊

[Peter200694013]

把涉及到的类，方法，接口都加上public

[简单DE生活]

都加了 还是那两个错误 我都郁闷了！！

错误 1 “HotelModels.Room”不可访问，因为它受保护级别限制
错误 2 可访问性不一致: 参数类型“HotelModels.Room”比方法“HotelDAL.RoomService.AddRoom(HotelModels.Room)”的可访问性低

[Peter200694013]

贴下那两个.cs文件中的所有代码

[简单DE生活]

using System;
using System.Collections.Generic;
using System.Text;

namespace HotelModels
{
public class Room
{
public Room() { }

private int roomId;
private string number = String.Empty;
private int bedNumber;
private string description = String.Empty;
private string state = String.Empty;
private int guestNumber;
private RoomType roomType;

public RoomType RoomType
{
get { return roomType; }
set { roomType = value; }
}

public int GuestNumber
{
get { return guestNumber; }
set { guestNumber = value; }
}

public string State
{
get { return state; }
set { state = value; }
}

public string Description
{
get { return description; }
set { description = value; }
}

public int BedNumber
{
get { return bedNumber; }
set { bedNumber = value; }
}

public string Number
{
get { return number; }
set { number = value; }
}

public int RoomId
{
get { return roomId; }
set { roomId = value; }
}
}
}

[简单DE生活]

using System;
using System.Collections.Generic;
using System.Text;
using HotelModels;


namespace HotelDAL
{
public class RoomService
{
public static int AddRoom(Room room)
{
string sql = "insert into Room(Number,BedNumber,Description,State,GuestNumber,TypeId)" +
" values(@Number,@BedNumber,@Description,@State,@GuestNumber,@TypeId)";
sql += " ; select @@identity";
SqlParameter[] para = new SqlParameter[]
{
new SqlParameter("@Number",room.Number),
new SqlParameter("@BedNumber",room.BedNumber),
new SqlParameter("@Description",room.Description),
new SqlParameter("@State",room.State),
new SqlParameter("@GuestNumber",room.GuestNumber),
new SqlParameter("@TypeId",room.RoomType.TypeId)
};
return DBHelper.GetScalar(sql, para);
}

public string a()
{


}

}
}

[Peter200694013]

room.RoomType.TypeId

RoomType也是public么？ TypeId 呢？
建议检查下所有涉及到的类

[handyzhu]

是不是你类加了public 之后没有重新生成 引用？

[wuyq11]

DAL应该继承IDAL接口

[简单DE生活]

哦 ，我看看能不能换种方法 吧！我还是不太明白 谢谢了 麻烦你了！！

[wuyq11]

添加项目project引用

[stickking]

重新生成一下解决方案，应该可以解决的，因为就是public的问题。