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copied!<p>Implement an action filter of your own, which will centrally detect the current logged in user and apply it to a parameter of your function. Something like this:</p> <pre><code>[AttributeUsage(AttributeTargets.Method | AttributeTargets.Class, AllowMultiple = false)] public class UserIDFilter : ActionFilterAttribute { public bool Require { get; set; } public override void OnActionExecuting(ActionExecutingContext filterContext) { if (Require) { if (Membership.GetUser() == null) { string formsAuthenticationToken = HttpContext.Current.Request.Form["cookie"]; if (!string.IsNullOrEmpty(formsAuthenticationToken)) { FormsAuthenticationTicket ticket = FormsAuthentication.Decrypt(formsAuthenticationToken); if (ticket != null) { FormsIdentity identity = new FormsIdentity(ticket); string[] roles = Roles.GetRolesForUser(identity.Name); GenericPrincipal principal = new GenericPrincipal(identity, roles); HttpContext.Current.User = principal; } } if (Membership.GetUser() == null) throw new UserNotAuthenticatedException(); } } const string key = "userId"; if (filterContext.ActionParameters.ContainsKey(key)) { if (Membership.GetUser() != null) filterContext.ActionParameters[key] = (Guid)Membership.GetUser().ProviderUserKey; else filterContext.ActionParameters[key] = (Guid?)null; } base.OnActionExecuting(filterContext); } } </code></pre> <p>And then decorate each action with:</p> <pre><code>[UserIDFilter] (and the action will have 1st parameter: Guid? userId) </code></pre> <p>or</p> <pre><code>[UserIDFilter(Require=true) (and the action will have 1st parameter: Guid userId) </code></pre>

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