ActionFilterAttribute重定向到带参数的action方法

Question

我已经进行了自定义访问检查ActionFilterAttribute,如果他们没有足够的访问权限我想重定向到错误页面.这是我到目前为止所拥有的.

RouteValueDictionary routeValues = new RouteValueDictionary(new {
                action = "Error",
                controller = "Home",
                error = new Error(HttpStatusCode.Unauthorized, "You do not have sufficient access to complete your request.", (HttpContext.Current != null ? HttpContext.Current.Request.UserHostAddress : ""), DateTime.Now)
            });
            filterContext.Result = new RedirectToRouteResult(routeValues);

这是错误页面操作方法

public ActionResult Error(Error error)

但是当路由重定向到action方法时,'error'参数为null,如果没有参数为null,我该怎么做？

Answer 1

重定向时,无法传递复杂的对象参数.您可以传递它的组成属性,并让默认模型绑定器完成重构它的工作.假设你有以下型号:

public class Error
{
    public string Message { get; set; }
    public HttpStatusCode Status { get; set; }
    public string UserHost { get; set; }
    public DateTime Date { get; set; }
}

你可以像这样重定向:

var routeValues = new RouteValueDictionary(new 
{
    action = "Error",
    controller = "Home",

    Message = "You do not have sufficient access to complete your request.",
    Status = HttpStatusCode.Unauthorized,

    // Remark: never use HttpContext.Current :
    UserHost = filterContext.HttpContext.Request.UserHostAddress,

    Date = DateTime.Now.ToString("u")
});
filterContext.Result = new RedirectToRouteResult(routeValues);

另外,对于处理授权,我建议您编写自定义AuthorizeAttribute而不是自定义ActionFilterAttribute.它在语义上更正确.