使用自定义消息的MVC 3 AuthorizeAttribute重定向

Question

如何创建自定义AuthorizeAttribute,以字符串参数的形式指定消息,然后将其传递到登录页面？

例如,理想情况下执行此操作会很酷:

[Authorize(Message = "Access to the blah blah function requires login. Please login or create an account")]
public ActionResult SomeAction()
{
    return View();
}

然后,在Login操作中,我可以这样做:

public ActionResult Login(string message = "")
{
    ViewData.Message = message;

    return View();
}

最后在视图中我可以这样做:

@if (!String.IsNullOrEmpty(ViewData.Message))
{
    <div class="message">@ViewData.Message</div>
}

<form> blah blah </form>

基本上我想将自定义消息传递到登录页面,以便我可以显示特定于用户在该特定时间尝试访问的消息.

Answer 1

你可以尝试这样的事情:

public class CustomAuthorizeAttribute : AuthorizeAttribute
{
    public string Message { get; set; }

    public override void OnAuthorization(AuthorizationContext filterContext)
    {
        var result = new ViewResult();
        result.ViewName = "Login.cshtml";        //this can be a property you don't have to hard code it
        result.MasterName = "_Layout.cshtml";    //this can also be a property
        result.ViewBag.Message = this.Message;
        filterContext.Result = result;
    }

用法:

    [CustomAuthorize(Message = "You are not authorized.")]
    public ActionResult Index()
    {
        return View();
    }