c# – 为什么我的Session [“value”]不能跨视图持续存在(asp.ne

我选择进行会话来存储一个值,我需要调用并更新一些控制器和视图.我知道可以使用BaseViewModel.cs做类似的事情,或者更少的会话-y,但我试图看看Session如何能够解决我的需求.这就是我正在做的事情：

流

我有一个局部视图,在我的_layout页面上呈现如下：

@Html.Action("OrgSwitch",new { controller = "Common",area = "InkScroll" })

这是一个包含登录用户组织的下拉列表.它命中了一个CommonController,负责处理在布局页面上渲染模型绑定逻辑的事情.在CommonController中我有这个视图和回发,如下所示：

[ChildActionOnly]
    public ViewResult OrgSwitch()
    {
        var userOrgs = new List<SelectListItem>();
        var user = Ctx.Users.FirstOrDefault(x => x.UserName == User.Identity.Name);
        int key = 0;
        if (user.Organizations.Count > 0)
        {
            TempData["HasOrgs"] = true;
            foreach (var org in user.Organizations)
            {
                if (Session["SelectedOrgKey"] == null)
                {
                    //currently setting selected by primary org id
                    //todo: set selected to tempdata selectedOrgId if there is one.
                    userOrgs.Add(org.OrganizationId.ToString() == user.PrimaryOrgId
                        ? new SelectListItem { Text = org.Name,Value = org.OrganizationId.ToString(),Selected = true }
                        : new SelectListItem { Text = org.Name,Selected = false });
                }
                else
                {
                    key = Convert.ToInt32(Session["SelectedOrgKey"]);
                    userOrgs.Add(org.OrganizationId == key
                        ? new SelectListItem { Text = org.Name,Selected = false });
                }
            }

            ViewBag.UserOrgs = userOrgs.OrderBy(x => x.Text);
        }
        else
        {
            ViewBag.UserOrgs = userOrgs;
            TempData["HasOrgs"] = false;
        }
        Session["SelectedOrgKey"] = key;
        return View();
    }

    [HttpPost]
    public RedirectToRouteResult OrgSwitch(string UserOrgs)
    {
        Session["SelectedOrgKey"] = UserOrgs;
        return RedirectToAction("Index","Recruiter",new { orgId = UserOrgs,area = "InkScroll" });
    }

这或多或少的初始加载将呈现下拉列表并将其默认为用户主要组织.如果他们选择了某些内容并回发了该选项,则默认情况下会在后续页面上显示所选内容.

尝试和失败

我正在尝试各种方式来利用Session值. viewresult中的一个区域：

[ChildActionOnly]
    public ViewResult StaffList()
    {
        var user = Ctx.Users.FirstOrDefault(x => x.UserName == User.Identity.Name);

        var model = new List<StaffListViewModel>();
        int key = Convert.ToInt32(Session["SelectedOrgKey"]);
        var org = user.Organizations.FirstOrDefault(x => x.OrganizationId == key);
        if (org.RegisteredMembers != null)
        {
            foreach (var req in org.RegisteredMembers)
            {
                model.Add(new StaffListViewModel
                {
                    UserName = req.UserName,Name = (req.FirstName ?? "") + " " + (req.LastName ?? ""),ImageLocation = req.ImageLocation
                });
            }
        }
        Session["SelectedOrgKey"] = key;
        return View(model);
    }

在这里’钥匙’空出来了.

另一个尝试是将它放在布局cshtml文件中,如下所示：

<li><a href="@Url.Action("Staff",new {area="",orgId = Convert.ToInt32(Session["SelectedOrgId"])})">Staff</a></li>

在这一个中,如果我将鼠标悬停在链接上,则orgId总是等于0.我是否在某处弄乱了？真的,我需要将这个SelectedOrgId用于应用程序的任何页面.

<system.web>
    <sessionState mode="InProc" timeout="60"></sessionState>
    ...other stuff..
</system.web>

Session["MyStringVariable"] = "Some value I want to keep around";
Session["MyIntegerVariable"] = 42;

var localVar = Session["MyStringVariable"].ToString();
var anotherLocalVar = Convert.ToInt32(Session["MyIntegerVariable"] = 42);