Question

将应用程序移动到MVC，我认为属性[action]将是处理会话的好地方。

当我逐步完成会话时，会话被设置但在控制器中它是null并且在页面刷新时它不会保持。

提前感谢您的帮助。

属性

public class SetPageDefaultAttribute : ActionFilterAttribute
{
    private string _sessionName = "PLANIT";

    public override void OnActionExecuting(ActionExecutingContext filterContext)
    {
        Page page;
        page = (Page)HttpContext.Current.Session[_sessionName] as Page;

        if (HttpContext.Current.Session[_sessionName] != null)
        {
            page = (Page)HttpContext.Current.Session[_sessionName] as Page;
        }
        else
        {
            //  set default page
            page = new Page();
        }
        page.Variables.CurrentController = filterContext.RouteData.Values["controller"].ToString().ToLower();
        page.Variables.CurrentAction = filterContext.RouteData.Values["action"].ToString().ToLower();

        //  return to session
        HttpContext.Current.Session[_sessionName] = page;

        base.OnActionExecuting(filterContext);
    }

}

控制器

[SetPageDefault]
public class LoginController : Controller
{
    public ActionResult Login()
    {

        var f = this.HttpContext.Session["PLANIT"];


        return View();
    }
}

所以我将属性更改为此...

public class SetPageDefaultAttribute : ActionFilterAttribute
{
    private string _sessionName = "PLANIT";

    public override void OnActionExecuting(ActionExecutingContext filterContext)
    {
        Page page;
        page = (Page)filterContext.HttpContext.Session[_sessionName] as Page;

        if (page != null)
        {
        }
        else
        {
            //  set default page
            page = new Page();
        }
        page.Variables.CurrentController = filterContext.RouteData.Values["controller"].ToString().ToLower();
        page.Variables.CurrentAction = filterContext.RouteData.Values["action"].ToString().ToLower();

        //  return to session
        filterContext.HttpContext.Session[_sessionName] = page;

        base.OnActionExecuting(filterContext);
    }

}

控制器这样做......

[SetPageDefault]
public class LoginController : Controller
{
    public ActionResult Login()
    {

        var f = this.ControllerContext.HttpContext.Session["PLANIT"];


        return View();
    }
}

页面刷新时它仍为空，因为它再次点击属性

Answer 1

我不确定这是否有效，但可能是因为您需要在filterContext内设置OnActionExecuting范围内的值：

public class SetPageDefaultAttribute : ActionFilterAttribute
{
    private string _sessionName = "PLANIT";

    public override void OnActionExecuting(ActionExecutingContext filterContext)
    {
        Page page;
        page = (Page)filterContext.HttpContext.Session[_sessionName] as Page;

        if (filterContext.HttpContext.Session[_sessionName] != null)
        {
            page = (Page)filterContext.HttpContext.Session[_sessionName] as Page;
        }
        else
        {
            //  set default page
            page = new Page();
        }
        page.Variables.CurrentController = filterContext.RouteData.Values["controller"].ToString().ToLower();
        page.Variables.CurrentAction = filterContext.RouteData.Values["action"].ToString().ToLower();

        //  return to session
        filterContext.HttpContext.Session[_sessionName] = page;

        base.OnActionExecuting(filterContext);
    }

}

MVC过滤器属性创建会话不起作用，返回null

1 个答案: