TempData 未持久化

发布于 2024-07-29 21:00:33 字数 669 浏览 4 评论 0原文

我有一个在返回视图之前设置 TempData 的控制器，

public ActionResult Edit(int id, int? order)
{
    Route route = new Route();
    // Do Work
    TempData["Route"] = route;
    return View(new FormViewModel(route, obj1, obj2));
}

该视图包含一个带有链接的部分视图，该链接转到另一个名为删除的操作方法，删除链接的代码是：

<%= Html.ActionLink("Delete", "Delete", new { order = item.Order })%>

删除操作方法的代码是

public ActionResult Delete(int order)
{
    Route route = (Route)TempData["Route"];
    // Do Work
}

：当我尝试获取 TempData["Route"]; 时，我遇到了问题从删除操作方法返回 null。

我想知道问题是否在于这是一个 Get 而不是 Post？如果是这样，我如何从表单中发布到删除操作方法？

原文

I have a controller that sets TempData before returning a view,

public ActionResult Edit(int id, int? order)
{
    Route route = new Route();
    // Do Work
    TempData["Route"] = route;
    return View(new FormViewModel(route, obj1, obj2));
}

This view contians a partial view with a link which goes to another action method called delete, the code for the delete link is:

<%= Html.ActionLink("Delete", "Delete", new { order = item.Order })%>

The code for the Delete action method is:

public ActionResult Delete(int order)
{
    Route route = (Route)TempData["Route"];
    // Do Work
}

The problem that I'm having is when I try to get TempData["Route"]; from the Delete action method is returning null.

I'm wondering if the issue is that this is a Get and not a Post? If so how can I do a Post to the Delete ActionMethod from within my form?

分享到QQ

分享到微博

如果你对这篇内容有疑问，欢迎到本站社区发帖提问参与讨论，获取更多帮助，或者扫码二维码加入 Web 技术交流群。

发布评论

需要登录才能够评论，你可以免费注册一个本站的账号。

小草泠泠 2024-08-05 21:00:34

我遇到了同样的问题，结果发现我们在 IControllerFactory 的实现中设置了 SessionStateBehavior readonly。我将其更改为默认值，然后出现了与会话状态不可用以及注册表项相关的后续错误...该错误已在我的本地计算机上通过启动 Asp. Windows 服务中的网络状态服务。

TempData 需要在请求之间使用会话状态。

希望这对某人有帮助。

回复收藏 0 原文

任性一次 2024-08-05 21:00:33

TempData 在两个请求之间持续存在。编辑操作中的 ReturnView 方法返回什么？据我所知，这不是 Controller 类中定义的标准方法。您是否在此方法中进行重定向（即返回 RedirectToRouteResult）？

此外，您的“编辑”和“删除”操作之间是否可能发生任何其他请求？例如ajax请求。

一般来说，使用 TempData 来长期保存某些内容并不是一个好主意。该模式通常如下：

public ActionResult Update() 
{
    // When you put something into the TempData dictionary you usually
    // redirect immediately to an action that will use the object stored
    // inside.
    TempData["something"] = "something";
    return RedirectToAction("success");
}

public ActionResult Success() 
{
    var something = TempData["something"];
    return View();
}

如果您需要将某些内容保留更长时间，则应该使用 Session。

TempData persist between two requests. What does the ReturnView method in your Edit action returns? As far as I can tell it is not a standard method defined in the Controller class. Are you redirecting in this method (i.e. returning a RedirectToRouteResult)?

Also are there any other requests that could occur between your Edit and Delete actions? For example ajax requests.

Generally it is not a good idea to use TempData to persist something for a long time. The pattern usually is the following:

public ActionResult Update() 
{
    // When you put something into the TempData dictionary you usually
    // redirect immediately to an action that will use the object stored
    // inside.
    TempData["something"] = "something";
    return RedirectToAction("success");
}

public ActionResult Success() 
{
    var something = TempData["something"];
    return View();
}

If you need to persist something for a longer time you should use Session.

回复收藏 0 原文