ASP.NET Core Identity Role, Claim and User

Question

I am an ASP.NET Core beginner. I\'m stuck in role, claim and user relationship.

I have a user Ben, user belongs to Admin role.

Answer 1

I have had to deal with this issue recently and to solve the problem of locating Users by a particular Claim that came from a Role is to create a new Claim object with the values from the Role Claim:

var role = await roleManager.FindByNameAsync(yourRoleName);
if(role != null)
{
    var roleClaims = await roleManager.GetClaimsAsync(role);
    if(roleClaims != null && roleClaims.Count() > 0)
    {
        foreach(var claim in roleClaims.ToList())
        {
            var users = await userManager.GetUsersForClaimAsync(new Claim(claim.Type, claim.Value));
            if(users != null && users.Count() > 0)
            {
                foreach(var user in users.ToList())
                {
                   //This is an example of only removing a claim, but this is the
                   //area where you could remove/add the updated claim
                   await userManager.RemoveClaimAsync(user, new Claim(claim.Type, claim.Value));
                }
            }
        }
    }
}

This allowed me to Update/Delete a role with claims and pass those changes to the Users to be Re-Issued/Removed that were assigned the roles and claims. However, I am still looking for something more elegant/easier with less code.