Question

我有一个c＃移动网站，并且某些移动客户端出现问题。我已经在下面发布了一条跟踪，但基本上是手机或wap网关的浏览器，手机连接到互联网网址，对表格中的viewstate隐藏输入进行编码。

/ wEPDwULLTExNTMyOTcwOTBkGAEFBlBtTGlzdA9nZA ==

变为

％2FwEPDwULLTExNTMyOTcwOTBkGAEFBlBtTGlzdA9nZA％3D％3D

所以viewstate失败了。

在进行处理之前是否有覆盖和urldecode viewstate信息？

System.Web.HttpException: The state information is invalid for this page and might be corrupted. ---> System.Web.UI.ViewStateException: Invalid viewstate. 
 Client IP: 65.91.116.34
 Port: 37172
 User-Agent: SCH-R430 UP.Browser/6.2.3.8 (GUI) MMP/2.0
 ViewState: %2FwEPDwULLTExNTMyOTcwOTBkGAEFBlBtTGlzdA9nZA%3D%3D
 Referer: 
 Path: /mobile/Inbox.aspx ---> System.FormatException: Invalid character in a Base-64 string.
   at System.Convert.FromBase64String(String s)
   at System.Web.UI.ObjectStateFormatter.Deserialize(String inputString)
   at System.Web.UI.ObjectStateFormatter.System.Web.UI.IStateFormatter.Deserialize(String serializedState)
   at System.Web.UI.Util.DeserializeWithAssert(IStateFormatter formatter, String serializedState)
   at System.Web.UI.HiddenFieldPageStatePersister.Load()
   --- End of inner exception stack trace ---
   --- End of inner exception stack trace ---
   at System.Web.UI.ViewStateException.ThrowError(Exception inner, String persistedState, String errorPageMessage, Boolean macValidationError)
   at System.Web.UI.ViewStateException.ThrowViewStateError(Exception inner, String persistedState)
   at System.Web.UI.HiddenFieldPageStatePersister.Load()
   at System.Web.UI.Page.LoadPageStateFromPersistenceMedium()
   at System.Web.UI.Page.LoadAllState()
   at System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)
   at System.Web.UI.Page.ProcessRequest(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)
   at System.Web.UI.Page.ProcessRequest()
   at System.Web.UI.Page.ProcessRequestWithNoAssert(HttpContext context)
   at System.Web.UI.Page.ProcessRequest(HttpContext context)
   at ASP.mobile_inbox_aspx.ProcessRequest(HttpContext context)
   at System.Web.HttpApplication.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute()
   at System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously)

Answer 1

您可以实现一个处理此问题的自定义ViewStatePersister对象。您可能希望从HiddenFieldPageStatePersister派生它。看看this article，它展示了如何在ViewState之上实现压缩，但与您需要做的非常相似。

涉及到一些hackiness：你需要使用反射来设置StateFormatter基类的字段，这与MSDN docs所说的相反，没有标记为虚拟的没有反思就不能被覆盖。

Answer 2

使用以下解决方案并检查其是否有效。这个对我有用。在您的asp.net代码中添加此代码，这会导致问题。下面的代码在vb.net

中

Protected Overrides Function LoadPageStateFromPersistenceMedium() As Object
        Return Session("_ViewState")
    End Function
Protected Overrides Sub SavePageStateToPersistenceMedium(viewState As Object)
        Session("_ViewState") = viewState
    End Sub

asp.net Base-64字符串中的字符无效

2 个答案: