回传与ASP.NET路由（视图状态MAC验证失败）工作 [英] Postback not working with ASP.NET Routing (Validation of viewstate MAC failed)

问题描述

我使用ASP.NET 3.5 SP1 System.Web.Routing经典的WebForms，如<一个描述href=\"http://chriscavanagh.word$p$pss.com/2008/04/25/systemwebrouting-with-webforms-sample/\">http://chriscavanagh.word$p$pss.com/2008/04/25/systemwebrouting-with-webforms-sample/

I'm using the ASP.NET 3.5 SP1 System.Web.Routing with classic WebForms, as described in http://chriscavanagh.wordpress.com/2008/04/25/systemwebrouting-with-webforms-sample/

所有工作正常，我有自定义的网址，搜索引擎优化，甚至回发的作品。 但是，就是回发总是失败情况下，我得到一个：

All works fine, I have custom SEO urls and even the postback works. But there is a case where the postback always fails and I get a:

的视图状态MAC验证失败。如果此应用程序由Web场或群集承载，确保配置指定了相同的validationKey和验证算法。自动生成不能在集群中使用。的

下面是重现错误的场景：

Here is the scenario to reproduce the error:

1. 一个按钮创建一个标准的Web窗体mypage.aspx


2. 创建一个路由映射A / B /（编号），以〜/ mypage.aspx


3. 当你执行的网站，你可以浏览的http：//本地主机：XXXX / A / B / 东西的页的作品。但是，当你preSS的按钮，你得到的错误。错误doen't当路由就是一个/（编号）发生。

1. Create a standard webform mypage.aspx with a button
2. Create a Route that maps "a/b/{id}" to "~/mypage.aspx"
3. When you execute the site, you can navigate http://localhost:XXXX/a/b/something the page works. But when you press the button you get the error. The error doen't happen when the Route is just "a/{id}".

这似乎是涉及到在url子路径的数目。如果至少有2子路径视图状态验证将失败。

It seems to be related to the number of sub-paths in the url. If there are at least 2 sub-paths the viewstate validation fails.

您得到错误甚至EnableViewStateMac =假。

You get the error even with EnableViewStateMac="false".

任何想法？它是一个错误吗？

Any ideas? Is it a bug?

感谢

推荐答案

我工作围绕这通过让我的看法用户控件从这一类，而不是继承 ViewUserControl＆LT; T＆GT; （它是一种为的RenderView补丁）。这为我做的伎俩，希望它为你工作了。

I worked around this by having my view user control inherit from this class instead of ViewUserControl<T> (it's kind of a patch for RenderView). It did the trick for me, hopefully it works for you too.

public class ViewUserControlWithoutViewState<T> : ViewUserControl<T> where T : class {
    protected override void LoadViewState(object savedState) {}

    protected override object SaveControlState() {
        return null;
    }

    protected override void LoadControlState(object savedState) {}

    protected override object SaveViewState() {
        return null;
    }

    /// <summary>
    /// extracted from System.Web.Mvc.ViewUserControl
    /// </summary>
    /// <param name="viewContext"></param>
    public override void RenderView(ViewContext viewContext) {
        viewContext.HttpContext.Response.Cache.SetExpires(DateTime.Now);
        var containerPage = new ViewUserControlContainerPage(this);
        ID = Guid.NewGuid().ToString();
        RenderViewAndRestoreContentType(containerPage, viewContext);
    }

    /// <summary>
    /// extracted from System.Web.Mvc.ViewUserControl
    /// </summary>
    /// <param name="containerPage"></param>
    /// <param name="viewContext"></param>
    public static void RenderViewAndRestoreContentType(ViewPage containerPage, ViewContext viewContext) {
        string contentType = viewContext.HttpContext.Response.ContentType;
        containerPage.RenderView(viewContext);
        viewContext.HttpContext.Response.ContentType = contentType;
    }

    /// <summary>
    /// Extracted from System.Web.Mvc.ViewUserControl+ViewUserControlContainerPage
    /// </summary>
    private sealed class ViewUserControlContainerPage : ViewPage {
        // Methods
        public ViewUserControlContainerPage(ViewUserControl userControl) {
            Controls.Add(userControl);
            EnableViewState = false;
        }

        protected override object LoadPageStateFromPersistenceMedium() {
            return null;
        }

        protected override void SavePageStateToPersistenceMedium(object state) {}
    }
}

博客上讲述这个的前一段时间。

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