private string FormatOrRenewParameter(ControllerContext controllerContext, string then)
{
var httpContext = controllerContext.RequestContext.HttpContext;
var request = httpContext.Request;
var server = httpContext.Server;
if (string.IsNullOrWhiteSpace(then))
{
if (ReferrerAllowed && request.UrlReferrer != null)
{
var reffererUrl = request.UrlReferrer.ToString();
if (httpContext.Url().IsLocalUrl(reffererUrl))
{
then = reffererUrl;
}
}
if (then.AsNullIfEmpty() == null)
{
if (RouteName.AsNullIfEmpty() == null)
{
RouteName = DefaultRouteName;
RouteValues = null;
}
var defaultUrl = RouteName.GetUrl(RouteValues);
if (httpContext.Url().IsLocalUrl(defaultUrl))
{
then = defaultUrl;
}
}
}
then = FilterMultipleThensIfExists(server, then);
return(then);
}
