2
我有一个用户想要选择他的性别而不是必填字段的senario。在我的用户界面中，性别列在下拉列表中，其中有两个选项男性和女性并且具有可选标签性别。但是性别是我项目中的一个枚举，所以如果用户没有选择任何性别，则必须将空值输入到数据库中，但不幸的是，由于一些强制性异常，我无法做到这一点。任何机构都可以帮助我解决这个问题？试图从int映射时，转换异常无效？枚举？
我是用petapoco作为我的ORM，所以我的用户实体看起来像这样
using System;
using System.Collections.Generic;
using System.ComponentModel.DataAnnotations;
using System.Linq;
using System.Text;
using Helpers;
using PetaPoco;
using StructureMap;
[TableName("User")]
[PrimaryKey("UserId")]
[ExplicitColumns]
public class User
{
[Column("UserId")]
public int Id { get; set; }
[Column]
[Required]
public Guid Identifier { get; set; }
[Column("UserStatusId")]
[Required]
public UserStatus UserStatus { get; set; }
[Column]
[Required]
public int RoleId { get; set; }
[Column]
public int? SchoolId { get; set; }
[Column]
public int? LanguageId { get; set; }
[Column("TitleId")]
[Required]
public Title Title { get; set; }
[Column("GenderId")]
[Required]
public Gender? Gender { get; set; }
[Column]
[Required]
[StringLength(35)]
public string Username { get; set; }
[StringLength(100)]
public string Password { get; set; }
[Column]
[StringLength(100)]
public string PasswordEncrypted { get; set; }
[Column]
[StringLength(10)]
public string PasswordSalt { get; set; }
[Column]
[Required]
[DataType(DataType.EmailAddress)]
[StringLength(255)]
public string Email { get; set; }
[Column]
[Required]
[StringLength(35)]
public string FirstName { get; set; }
[Column]
[Required]
[StringLength(35)]
public string LastName { get; set; }
public string FullName {
get
{
return string.Concat(FirstName, " ", LastName);
}
}
[Column]
public DateTime? DateOfBirth { get; set; }
[Column]
public bool Subscribed { get; set; }
[Column]
public bool TermsAgreed { get; set; }
[Column]
public DateTime? TermsAgreedDate { get; set; }
[Column]
public DateTime CreatedDate { get; set; }
[Column]
public DateTime ModifiedDate { get; set; }
[Column]
public DateTime? LoginDate { get; set; }
public Role Role { get; set; }
public School School { get; set; }
public Language Language { get; set; }
}
我的性别枚举是这样
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Linq;
using System.Text;
public enum Gender
{
/// <summary>
/// Male
/// </summary>
[Description("Male")]
Male = 1,
/// <summary>
/// Female
/// </summary>
[Description("Female")]
Female
}
和我的视图模型看起来像这样
using System;
using System.Collections.Generic;
using System.ComponentModel.DataAnnotations;
using System.Web.Mvc;
/// <summary>
/// Model for edit view model user
/// </summary>
public class UserEditViewModel
{
/// <summary>
/// Gets or sets the User id
/// </summary>
public int Id { get; set; }
/// <summary>
/// Gets or sets Title Id
/// </summary>
public int UserTitle { get; set; }
/// <summary>
/// Gets or sets the school Name
/// </summary>
public string Username { get; set; }
/// <summary>
/// Gets or sets the School first name
/// </summary>
public string FirstName { get; set; }
/// <summary>
/// Gets or sets the school last name
/// </summary>
public string LastName { get; set; }
/// <summary>
/// Gets or sets the school address line1
/// </summary>
public string Password { get; set; }
/// <summary>
/// Gets or sets the school address line2
/// </summary>
public string ConfirmPassword { get; set; }
/// <summary>
/// Gets or sets the email address of the school
/// </summary>
public string Email { get; set; }
/// <summary>
/// Gets or sets the created date
/// </summary>
public DateTime CreatedDate { get; set; }
/// <summary>
/// Gets or sets user status id
/// </summary>
public int UserStatus { get; set; }
/// <summary>
/// Gets or sets SchoolName
/// </summary>
public string SchoolDetails { get; set; }
/// <summary>
/// Gets or sets Language Id
/// </summary>
public int LanguageId { get; set; }
/// <summary>
/// Gets or sets Langauge list
/// </summary>
public IList<Language> Langauges { get; set; }
/// <summary>
/// Gets or sets RoleId
/// </summary>
public int RoleId { get; set; }
/// <summary>
/// Gets or sets SchoolId
/// </summary>
public int SchoolId { get; set; }
/// <summary>
/// Gets or sets DateOfBirth
/// </summary>
public DateTime DateOfBirth { get; set; }
/// <summary>
/// Gets or sets Gender
/// </summary>
public int? Gender { get; set; }
/// <summary>
/// Gets UserGender list
/// </summary>
public Dictionary<int, string> Genders
{
get
{
var listitems = new Dictionary<int, string>();
foreach (Gender r in Enum.GetValues(typeof(Gender)))
{
listitems.Add((int)r, r.ToString());
}
return listitems;
}
}
/// <summary>
/// Gets Title list
/// </summary>
public Dictionary<int, string> Titles
{
get
{
var listitems = new Dictionary<int, string>();
foreach (Title r in Enum.GetValues(typeof(Title)))
{
listitems.Add((int)r, r.ToString());
}
return listitems;
}
}
/// <summary>
/// Gets UserStatus list
/// </summary>
public Dictionary<int, string> UserStatuses
{
get
{
var listitems = new Dictionary<int, string>();
foreach (UserStatus r in Enum.GetValues(typeof(UserStatus)))
{
listitems.Add((int)r, r.ToString());
}
return listitems;
}
}
/// <summary>
/// Gets or sets a value indicating whether Subscribed
/// </summary>
public bool Subscribed { get; set; }
/// <summary>
/// Gets or sets a value indicating whether TermsAgreed
/// </summary>
public bool TermsAgreed { get; set; }
}
而我使用automapper来映射User到UserEditviewModel，反之亦然
Mapper.CreateMap<User, UserEditViewModel>().ForMember(
dest => dest.Langauges, opt => opt.Ignore()).ForMember(
dest => dest.Password, opt => opt.Ignore()).ForMember(
dest => dest.ConfirmPassword, opt => opt.Ignore()).ForMember(
dest => dest.SchoolDetails, opt => opt.MapFrom(src =>
(!string.IsNullOrEmpty(src.School.SchoolDetails.Region)) ?
string.Concat(src.School.Name, ", ",
src.School.SchoolDetails.City, ", ",
src.School.SchoolDetails.Region, ", ",
src.School.SchoolDetails.PostalCode) :
string.Concat(src.School.Name, ", ",
src.School.SchoolDetails.City, ", ",
src.School.SchoolDetails.PostalCode))).ForMember(
dest => dest.Titles, opt => opt.Ignore()).ForMember(
dest => dest.UserStatuses, opt => opt.Ignore()).ForMember(
dest => dest.UserTitle, opt => opt.MapFrom(src => src.Title)).ForMember(
dest => dest.Genders, opt => opt.Ignore()).ForMember(
dest => dest.Gender, opt => opt.MapFrom(src =>
src.Gender == null ? (int?)null : (int)src.Gender));
Mapper.CreateMap<UserEditViewModel, User>().ForMember(
dest => dest.Username, opt => opt.MapFrom(src =>
HttpUtility.HtmlDecode(src.Username))).ForMember(
dest => dest.FirstName, opt => opt.MapFrom(src =>
HttpUtility.HtmlDecode(src.FirstName))).ForMember(
dest => dest.LastName, opt => opt.MapFrom(src =>
HttpUtility.HtmlDecode(src.LastName))).ForMember(
dest => dest.Password, opt => opt.MapFrom(src =>
HttpUtility.HtmlDecode(src.Password))).ForMember(
dest => dest.Email, opt => opt.MapFrom(src =>
HttpUtility.HtmlDecode(src.Email))).ForMember(
dest => dest.Role, opt => opt.Ignore()).ForMember(
dest => dest.RoleId, opt => opt.Ignore()).ForMember(
dest => dest.ModifiedDate, opt => opt.Ignore()).ForMember(
dest => dest.School, opt => opt.Ignore()).ForMember(
dest => dest.Language, opt => opt.Ignore()).ForMember(
dest => dest.LoginDate, opt => opt.Ignore()).ForMember(
dest => dest.PasswordEncrypted, opt => opt.Ignore()).ForMember(
dest => dest.PasswordSalt, opt => opt.Ignore()).ForMember(
dest => dest.TermsAgreedDate, opt => opt.Ignore()).ForMember(
dest => dest.Identifier, opt => opt.Ignore()).ForMember(
dest => dest.Title, opt => opt.MapFrom(src => src.UserTitle)).ForMember(
dest => dest.Gender, opt => opt.MapFrom(src =>
src.Gender == null ? (Gender?)null : (Gender)src.Gender));
但是做这一切的IAM越来越例外就像从 'System.Int32' 到“System.Nullable`1这个 无效的转换
有人能帮忙照顾？
扔给我们一块骨头，至少告诉我们错误的行号。 – Hogan
@Hogan： - 实际上错误是在Mapper.AssertConfigurationIsValid（）行中抛出的，但它似乎是从petapoco抛出的。 –
我很惊讶没有人高喊“变性人 - 恐惧症”在你身上！只是去显示它是一个Reddit的东西！ – user3791372