二、让数据活起来-数据搭建

一、构建数据

1、数据库设计

用户表、分组表、群组表、用户关系表、群组群员（用户）关系表、分组用户关系表

2、后台数据结构

using System;
using System.Collections.Generic;

namespace LayIM
{
    public class Class1
    {
    }

    /// <summary>
    /// 返回结果
    /// </summary>
    public class JsonResultModel
    {
        public JsonResultType Code { get; set; }
        public object Data { get; set; }
        public string Msg { get; set; }
    }

    /// <summary>
    /// 成功失败
    /// </summary>
    public enum JsonResultType
    {
        Success = 0,
        Failed = 1
    }

    /// <summary>
    /// 基础信息json 其中FriendGroupEntity代表好友分组信息，GroupEntity代表群组信息，UserEntity就是了
    /// </summary>
    public class BaseListResult
    {
        public BaseListResult()
        {
            //friend = new List<FriendGroupEntity>();
            //group = new List<GroupEntity>();
        }
        /// <summary>
        /// 
        /// </summary>
        public IEnumerable<FriendGroupEntity> Friend { get; set; }
        /// <summary>
        /// 
        /// </summary>
        public IEnumerable<GroupEntity> Group { get; set; }
        /// <summary>
        /// 
        /// </summary>
        public UserEntity Mine { get; set; }
    }
    
    /// <summary>
    /// 群员信息json
    /// </summary>
    public class MembersListResult
    {
        /// <summary>
        /// 群主
        /// </summary>
        public UserEntity Owner { get; set; }
        /// <summary>
        /// 群成员列表
        /// </summary>
        public IEnumerable<GroupUserEntity> List { get; set; }
    }

    #region 用户基础信息
    /// <summary>
    /// 基类
    /// </summary>
    public class BaseEntity
    {
        public int Id { get; set; }
    }
    /// <summary>
    /// 基类
    /// </summary>
    public class AvatarEntity : BaseEntity
    {
        public string Avatar { get; set; }
    }

    /// <summary>
    /// 用户基础信息(我的和好友的)
    /// </summary>
    public class UserEntity : AvatarEntity
    {
        public string Status { get; set; }
        public string UserName { get; set; }
        public string Sign { get; set; }
    }
    #endregion

    #region 好友分组信息
    public class FriendGroupEntity
    {
        public string GroupName { get; set; }
        public string Id { get; set; }
        public string Online  { get; set; }
        public string List { get; set; }
    }
    #endregion

    #region 群组信息
    public class GroupEntity
    {
        public string GroupName { get; set; }
        public string Id { get; set; }
        public string Avatar { get; set; }
    }
    #endregion

    #region 通过群组获取好友列表
    public class GroupUserEntity
    {
        public string UserName { get; set; }
        public string Id { get; set; }
        public string Avatar { get; set; }
        public string Sign { get; set; }
    }
    #endregion

}