C# ASP.NET标识-未调用自定义角色验证

我正在尝试创建一个自定义

RoleValidator

对象来验证我的自定义

IdentityRole

。我已经创建了一个继承自

RoleValidator

的

applicationrolevalidator

类，并将其设置为我的

applicationrolemager

类中的

RoleValidator

。但是当我创建新角色时，验证函数

ValidateAsync

从未被调用

我曾经尝试过类似的问题，比如实现

UserValidator

而这一个却无法让它工作

/// <summary>
/// Custom role validator, used to validate new instances of ApplicationRole that are added to the system.
/// </summary>
/// <typeparam name="TRole">The type of the role.</typeparam>
public class ApplicationRoleValidator<TRole> : RoleValidator<TRole> where TRole : ApplicationRole
{
    private RoleManager<TRole, string> Manager { get; set; }

    /// <summary>
    /// Initializes a new instance of the <see cref="ApplicationRoleValidator" /> class.
    /// </summary>
    /// <param name="manager">The manager.</param>
    public ApplicationRoleValidator(RoleManager<TRole, string> manager) : base(manager)
    {
        Manager = manager;
    }

    /// <summary>
    /// Validates a role before saving.
    /// </summary>
    /// <param name="item"></param>
    /// <returns></returns>
    /// <exception cref="System.ArgumentNullException">item</exception>
    public override async Task<IdentityResult> ValidateAsync(TRole item)
    {
        if (item == null)//<= break point here never reached.
        {
            throw new ArgumentNullException(nameof(item));
        }

        var rslt = base.ValidateAsync(item);
        if (rslt.Result.Errors.Any())
        {//return error if found
            return IdentityResult.Failed(rslt.Result.Errors.ToArray());
        }

        var errors = new List<string>();
        //validate the min num of members
        if (role.MinimumNumberOfMembers < 0)
        {
            errors.Add(string.Format(CultureInfo.CurrentCulture, "最小数は0以上でなければなりません。"));
        }

        return errors.Count > 0 ? IdentityResult.Failed(errors.ToArray()) : IdentityResult.Success;
    }
}

正在通过调用ApplicationRoleManager上的Create来创建角色

var store = new ApplicationRoleStore(new MyContext());
var manager = new ApplicationRoleManager(store);
manager.Create(group);

---

您正在ApplicationRoleManager的Create方法中将ApplicationRoleValidator设置为ApplicationRoleManager的RoleValidator。在您发布的最后3行代码中，您正在更新ApplicationRoleManager的一个实例。此ApplicationRoleManager实例获取默认值RoleValidator

如果要新建ApplicationRoleManager实例，必须将该逻辑放入构造函数中

public ApplicationRoleManager(IRoleStore<ApplicationRole, string> store) : base(store)
{
     RoleValidator = new ApplicationRoleValidator<ApplicationRole>(this);
}

公共应用程序角色管理器（IRoleStore存储）：基本（存储）
{
RoleValidator=新应用RoleValidator（本）；
}

我正试图在ASP.NET内核中通过依赖项注入实现这一点。

public ApplicationRoleManager(IRoleStore<ApplicationRole, string> store) : base(store)
{
     RoleValidator = new ApplicationRoleValidator<ApplicationRole>(this);
}