viewstate

问题 I am trying to wrap my head around the control infrastructure to understand which ones ASP.NET maintains view state for. There are these regular HTML controls ex: <input type="radio" checked="checked"/> -> I understand these do not have viewstate Then there are HTML controls with runat="server" <input type="radio" checked="checked" runat="server"/> -> Does the viewstate get maintained between postbacks? Then there are ASP.NET controls <asp:TextBox id="txtMyText" runat="server"/> -> I

问题 I'm trying to get asp.net to store viewstate in the session rather than bulking up the html. Now i've read that asp.net comes with the SessionPageStatePersister which can be used instead of the default HiddenFieldPageStatePersister to do this. I was wondering how i go about dropping it in? This is what i've got so far: I think i need to create a PageAdapter that returns a SessionPageStatePersister from its GetStatePersister method, and somehow get the page to use this pageadapter. But Page

问题 I know there are tools out there that will let you see the content of asp.net viewstate. Is it possible to see and modify the content of viewState if it has been encrypted by adding the <machineKey ... /> node to the web.config? 回答1: Sure. ViewState is simply base64 encoded (unless you specify that it should be encrypted). Here's a link to someone that wrote a ViewState viewer. Here's another by Fritz Onion. You probably will not be able to directly modify the ViewState (i.e. outside of code)

问题 I keep on hearing this words "Viewstate Chunking". What is Viewstate Chunking? And how it is working for ASP.NET pages? 回答1: When the ViewState in your page becomes very large it can be a problem since some firewalls and proxies will prevent access to pages containing huge ViewState sizes. For this purpose ASP.NET introduces the ViewState Chunking mechanism. So ASP.NET enables splitting of the ViewState's single hidden field into several using the MaxPageStateFieldLength property in the web

问题 I keep on hearing this words "Viewstate Chunking". What is Viewstate Chunking? And how it is working for ASP.NET pages? 回答1: When the ViewState in your page becomes very large it can be a problem since some firewalls and proxies will prevent access to pages containing huge ViewState sizes. For this purpose ASP.NET introduces the ViewState Chunking mechanism. So ASP.NET enables splitting of the ViewState's single hidden field into several using the MaxPageStateFieldLength property in the web

问题 What different ways are Machine Keys useful in asp.net? I think the following are correct but thought there may be more. Multiple applications can use the same cookie Multiple servers can work with the same viewstate 回答1: MachineKey is used for: ViewState encryption and validation Forms Authentication (or Federated Authentication) uses this key for signing the authentication ticket Having a Web App installed on multiple servers requires same Machine Key configured on all of them in order for

问题 One of the major reasons for using webforms is the ease of being able to maintain viewstate. I would like to build an asp.net mvc application so what options do I have for maintaining viewstate? Kind regards 回答1: ASP.NET MVC does not use ViewState in the traditional sense (that of storing the values of controls in the web page). Rather, the values of the controls are posted to a controller method. Once the controller method has been called, what you do with those values is up to you. ASP.NET

问题 I have an ASP.NET 2.0 application that is working fine in our local environment. When published to a test server, we're getting intermittent errors on the server. Here's the most common: Padding is invalid and cannot be removed. Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code. Exception Details: System.Security.Cryptography.CryptographicException

问题 Mojarra Implementation of JSF 2 has the following context params: com.sun.faces.numberOfViewsInSession (default is 15) com.sun.faces.numberOfLogicalViews (default is 15) What is the difference between them? The documentation doesn't speak much about these. My app was having trouble with ViewExpiredException for some pages, but after we bumped these settings to a (much) higher value, we stopped having problems. My app is a financial, form-heavy, ajax-enabled app (some screens have 50+ inputs,

问题 As the title says, I am getting: Invalid length for a Base-64 char array. I have read about this problem on here and it seems that the suggestion is to store ViewState in SQL if it is large. I am using a wizard with a good deal of data collection so chances are my ViewState is large. But, before I turn to the "store-in-DB" solution, maybe somebody can take a look and tell me if I have other options? I construct the email for delivery using the below method: public void