SqlException：當IDENTITY_INSERT設置為OFF時，無法為表'AspNetUsers'中的Identity列插入顯式值

Question

我已使用Microsoft.AspNet.Identity的enable-migration將aspnetuser表的表列數據類型字符串更改為long。

使用以下遷移腳本成功創建了表：

CreateTable(
"dbo.AspNetUsers",
c => new
{
Id = c.Long(nullable:false,identity:true),
Email = c.String(maxLength: 256),
EmailConfirmed = c.Boolean(nullable: false),
PasswordHash = c.String(),
SecurityStamp = c.String(),
PhoneNumber = c.String(),
PhoneNumberConfirmed = c.Boolean(nullable: false),
TwoFactorEnabled = c.Boolean(nullable: false),
LockoutEndDateUtc = c.DateTime(),
LockoutEnabled = c.Boolean(nullable: false),
AccessFailedCount = c.Int(nullable: false),
UserName = c.String(nullable: false, maxLength: 256),
FullName = c.String(nullable: false, maxLength: 50),
CreatedBy = c.Long(nullable: true),
CreatedDate = c.DateTime(),
ModifiedDate = c.DateTime(nullable: false, defaultValue: null, defaultValueSql: null),
ModifiedBy = c.Long(nullable: true),
IsDeleted = c.Boolean(nullable: false, defaultValue: false, defaultValueSql: "0")
})
.PrimaryKey(t => t.Id)
.Index(t => t.UserName, unique: true, name: "UserNameIndex");

但是，當我嘗試使用以下代碼創建用戶時，由於“ SqlException：當IDENTITY_INSERT設置為OFF時，無法在表'AspNetUsers'中為身份列插入顯式值”。

// first we create Admin rool
var role = new Microsoft.AspNet.Identity.EntityFramework.IdentityRole();
role.Name = SuperAdminRole;
roleManager.Create(role);

//Here we create a Admin super user who will maintain the website               

var user = new ApplicationUser();
user.UserName = "Admin";
user.Email = "xyz@gmail.com";
user.FullName = "xyz";
user.IsDeleted = false;
user.ModifiedBy = null;
user.ModifiedDate = null;
user.CreatedBy = string.Empty;
user.CreatedDate = DateTime.Now;

string userPWD = "admin_123";
var chkUser = UserManager.Create(user, userPWD);

如果有人對此有解決方案，請分享。

感謝您的快速回復！

Answer 1

我相信IDENTITY_INSERT是自動遞增功能，並且設置為OFF。 因此，驗證字段“ Id”是sql數據庫中的標識列，並在代碼優先實體框架的“ Id”列中添加以下屬性

[DatabaseGeneratedAttribute(DatabaseGeneratedOption.Identity)]
public int Id { get; set; }