我是ASP.NET初學者,我試圖在ASP.NET-MVC項目中使用Identity框架構建用戶系統。Usermanager與模型繼承自應用程序用戶
我想有「Admin」用戶實體從基礎機構「applicationUser」這是默認在我的模型創建(我小的改動)繼承:
public class ApplicationUser : IdentityUser
{
[Required]
[StringLength(50)]
[Display(Name = "Last Name")]
public string LastName { get; set; }
[Required]
[StringLength(50, ErrorMessage = "First name cannot be longer than 50 characters.")]
[Column("FirstName")]
[Display(Name = "First Name")]
public string FirstMidName { get; set; }
[Display(Name = "Full Name")]
public string FullName
{
get
{
return LastName + ", " + FirstMidName;
}
}
}
public class Admin: ApplicationUser
{
[DatabaseGenerated(DatabaseGeneratedOption.Identity)]
public int AdID;
}
我也將從添加其他2繼承applicationUser,我想爲不同的用戶分別存儲不同的信息,以便在他們的數據庫文件中存儲不同的信息,並讓他們全部登錄到我的網站。
在啓動時我試圖最初使用此代碼添加管理員用戶(某處取計算器的答案):
public static async Task CreateRoles(SchoolContext context, IServiceProvider serviceProvider)
{
var userManager = serviceProvider.GetRequiredService<UserManager<ApplicationUser>>();
var roleManager = serviceProvider.GetRequiredService<RoleManager<IdentityRole>>();
// First, Creating User role as each role in User Manager
List<IdentityRole> roles = new List<IdentityRole>();
roles.Add(new IdentityRole { Name = "Student", NormalizedName = "STUDENT" });
roles.Add(new IdentityRole { Name = "ADMIN", NormalizedName = "ADMINISTRATOR" });
roles.Add(new IdentityRole { Name = "Professor", NormalizedName = "PROFESSOR" });
//Then, the machine added Default User as the Admin user role
foreach (var role in roles)
{
var roleExit = await roleManager.RoleExistsAsync(role.Name);
if (!roleExit)
{
context.Roles.Add(role);
context.SaveChanges();
}
}
await CreateUser(context, userManager);
}
private static async Task CreateUser(SchoolContext context, UserManager<ApplicationUser> userManager)
{
var adminUser = await userManager.FindByEmailAsync("[email protected]");
if (adminUser != null)
{
if (!(await userManager.IsInRoleAsync(adminUser, "ADMINISTRATOR")))
await userManager.AddToRoleAsync(adminUser, "ADMINISTRATOR");
}
else
{
var newAdmin = new applicationUser()
{
UserName = "[email protected]",
Email = "[email protected]",
LastName = "Admin",
FirstMidName = "Admin",
};
var result = await userManager.CreateAsync(newAdmin, "password123;");
if (!result.Succeeded)
{
var exceptionText = result.Errors.Aggregate("User Creation Failed
- Identity Exception. Errors were: \n\r\n\r",
(current, error) => current + (" - " + error + "\n\r"));
throw new Exception(exceptionText);
}
await userManager.AddToRoleAsync(newAdmin, "ADMINISTRATOR");
}
}
但是,當我嘗試這樣做,我收到一個異常: 「無法插入值'NULL'列'Discriminator',表'aspnet-University;列不允許空值INSERT失敗。 該語句已被終止。
如果我嘗試更改「new Admin」而不是「new applicationUser」的變量Admin類型,我收到另一個異常: 找不到實體類型'Admin'。確保實體類型已被添加到模型中。
我知道這個問題是關於身份框架的基礎知識;我還沒有很好地理解他們;我剛開始明白這是原理,我不知道如何處理我的問題。
我想我需要創建新的UserManager,它將能夠操縱從基本applicationUser模型繼承的實例。如果您向我推薦有關此主題的相關資源並幫助我解決問題,我將很高興。