是否可以使用Identity保存带有枚举参数的角色? [英] Is it possible to save a role with enum parameter using Identity?

问题描述

我正在尝试创建具有身份的授权.

I am experimenting with creating a authorization with identity.

到目前为止，一切工作都与我在网上找到的指导方针相配合.

So far eveything is working with the guidlines I have found online.

但是我想修改角色的保存.我已经创建了一个枚举，并将该枚举保存到aspNetRoles表中(代码如下).

However I want to modify the saving of roles. I have created an enum and I save this enum to aspNetRoles table (code will follow below).

将角色保存到用户的方式是通过以下方式:

The way a role is saved to a user is via the following:

UserManager.AddToRole(user.Id, "Admin");

我不喜欢发送字符串作为第二个参数，而是希望发送一个枚举.

I am not a fan of sending in a string as a second paramater and wish to send an enum instead.

这可能吗?

到目前为止，我的代码:

My code so far:

通过添加自定义属性来修改aspnetRoles表:

modification to aspnetRoles table by adding a custom property:

public class ApplicationDbContext : IdentityDbContext<ApplicationUser>
{
    public ApplicationDbContext()
        : base("DefaultConnection", throwIfV1Schema: false)
    {
    }

    public static ApplicationDbContext Create()
    {
        return new ApplicationDbContext();
    }

    new public DbSet<ApplicationRole> Roles { get; set; }
}

public class ApplicationRole : IdentityRole
{
    [Required]
    public RoleId roleId { get; set; }
}

public enum RoleId
{
    Developer = 0,
    Administrator = 1,
    Other = 2
}

在startup.cs中添加角色:

adding a role in startup.cs:

    if (!roleManager.RoleExists("Developer"))
    {
        // first we create Admin rool   
        var role = new ApplicationRole();
        role.Name = "Developer";
        role.roleId = RoleId.Developer;

        roleManager.Create(role);

        //Here we create a Admin super user who will maintain the website                  
        var user = new ApplicationUser();
        user.UserName = "ra3iden";
        user.Email = "[e-mail]";
        user.FirstName = "Myname";
        user.LastName = "LastName";

        string userPWD = "A@Z200711";

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

        //Add default User to Role Admin   
        if (chkUser.Succeeded)
        {
            var result1 = UserManager.AddToRole(user.Id, "Developer");
        }
    }

如上所述，我不希望拥有rolename属性，我想使用枚举，这是怎么做的?

As I mentioned above I don't wish to have the rolename property, I want to use the enum instead, how is this done?

aspNetRoles图片:

pic of aspNetRoles:

推荐答案

UserManager.AddToRole是

UserManager.AddToRole is an extension method, so you can write similar method to add your users to your roles:

public static IdentityResult AddToRole<TUser, TKey>(
this UserManager<TUser, TKey> manager,
TKey userId,
RoleId role
)
where TUser : class, Object, IUser<TKey>
where TKey : Object, IEquatable<TKey>
{
    return manager.AddToRoleAsync(userId, role.ToString())
                  .Result;
}

但也许这种情况需要采取不同的方法. "Admin"不是魔术常数，而是一个常数.如果您想将"Admin"重命名为"Administrator"怎么办?字符串常量重命名操作很困难，可能会出现错误.

But maybe this situation requires a different approach. "Admin" is not a magic constant, but it's a constant. What if you'll want rename "Admin" to "Administrator"? String constant renaming is difficult operation with possible errors.

您可以做的是为您的角色声明命名常量:

What you can do is to declare named constant for your roles:

public static class Role
{
    public const string Admin = "Admin";
    public const string Developer = "Developer";
    public const string Other = "Other";
}

. . .

UserManager.AddToRole(user.Id, Role.Admin);

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