// 将指定的用户赋予特定的角色。
public UserRole AssignRole(User user, Role role)
{
if (user == null)
throw new ArgumentNullException("user");
if (role == null)
throw new ArgumentNullException("role");
var userRole = _userRoleRepository.GetBySpecification(Specification<UserRole>.Eval(ur => ur.UserId == user.Id));
if (userRole == null)
{
userRole = UserRole.CreateUserRole(user, role);
_userRoleRepository.Add(userRole);
}
else
{
userRole.RoleId = role.Id;
_userRoleRepository.Update(userRole);
}
_repositoryContext.Commit();
return userRole;
}
// 将指定的用户从角色中移除。
public void UnassignRole(User user, Role role = null)
{
if (user == null)
throw new ArgumentNullException("user");
Expression<Func<UserRole, bool>> specExpression = null;
if (role == null)
specExpression = ur => ur.UserId == user.Id;
else
specExpression = ur => ur.UserId == user.Id && ur.RoleId == role.Id;
UserRole userRole = _userRoleRepository.GetBySpecification(Specification<UserRole>.Eval(specExpression));
if (userRole == null) return;
_userRoleRepository.Remove(userRole);
_repositoryContext.Commit();
}
public static UserRole CreateUserRole(User user, Role role)
{
return new UserRole() { UserId = user.Id, RoleId = role.Id };
}
