用户部分要实现的功能有：
序
一、用户
1.1用户注册
1.2用户登录
1.3修改密码
1.4修改资料
要实现这些目的首先新建用户（Model）模型
/// <summary>
/// 用户模型
/// </summary>
public class User
{
[Key]
public int UserId { get; set; }
/// <summary>
/// 用户组Id
/// </summary>
[Display(Name="用户组Id")]
[Required(ErrorMessage = "×")]
public int GroupId { get; set; }
/// <summary>
/// 用户名
/// </summary>
[Display(Name="用户名",Description="4-20个字符。")]
[Required(ErrorMessage = "×")]
[StringLength(20, MinimumLength = 4, ErrorMessage = "×")]
public string UserName { get; set; }
/// <summary>
/// 密码
/// </summary>
[Required]
[StringLength(256)]
public string Password { get; set; }
/// <summary>
/// 性别【0-男；1-女；2-保密】
/// </summary>
[Display(Name="性别")]
[Required(ErrorMessage = "×")]
[Range(0,2,ErrorMessage = "×")]
public byte Gender { get; set; }
/// <summary>
/// Email
/// </summary>
[Display(Name="Email",Description="请输入您常用的Email。")]
[Required(ErrorMessage = "×")]
[EmailAddress(ErrorMessage = "×")]
public string Email { get; set; }
/// <summary>
/// 密保问题
/// </summary>
[Display(Name="密保问题",Description="请正确填写，在您忘记密码时用户找回密码。4-20个字符。")]
[Required(ErrorMessage = "×")]
[StringLength(20, MinimumLength = 4, ErrorMessage = "×")]
public string SecurityQuestion { get; set; }
/// <summary>
/// 密保答案
/// </summary>
[Display(Name="密保答案",Description="请认真填写，忘记密码后回答正确才能找回密码。2-20个字符。")]
[Required(ErrorMessage = "×")]
[StringLength(20, MinimumLength = 2, ErrorMessage = "×")]
public string SecurityAnswer { get; set; }
/// <summary>
/// QQ号码
/// </summary>
[Display(Name="QQ号码")]
[RegularExpression("^[1-9][0-9]{4-13]$",ErrorMessage = "×")]
[StringLength(12, MinimumLength = 6, ErrorMessage = "×")]
public string QQ { get; set; }
/// <summary>
/// 电话号码
/// </summary>
[Display(Name="电话号码",Description="常用的联系电话（手机或固话），固话格式为：区号-号码。")]
[RegularExpression("^[0-9-]{11-13}$",ErrorMessage = "×")]
public string Tel { get; set; }
/// <summary>
/// 联系地址
/// </summary>
[Display(Name="联系地址",Description="常用地址，最多80个字符。")]
[StringLength(80, ErrorMessage = "×")]
public string Address { get; set; }
/// <summary>
/// 邮编
/// </summary>
[Display(Name="邮编")]
[RegularExpression("^[0-9]{6}$",ErrorMessage = "×")]
public string PostCode { get; set; }
/// <summary>
/// 注册时间
/// </summary>
public DateTime? RegTime { get; set; }
/// <summary>
/// 上次登录时间
/// </summary>
public DateTime? LastLoginTime { get; set; }
/// <summary>
/// 用户组
/// </summary>
public virtual UserGroup Group { get; set; }
}
