In which format is information stored in view state?
I want to know in which format information is stored in view state, as it is quite useful for storing information during multiple postbacks. ...
viewstate
Which types of objects can we place in view state?
I want to know why we must set the serializable attribute to save an object in view state. Also, which type of objects can we store in view state? ...
What are the limitations of the view state approach?
I know that the view state approach is limited to only a specific page. When we navigate to another page then information is lost. Other than this limitation are there any limitations with view state? ...
Can't keep custom attributes in DOM?
A very simple asp.net webform page. <asp:DronDownList id="ddl" runat="server"> <asp:Button id="btn" runat="server" Text="Do nothing but post back" /> In Page_Load: if (!IsPostBack) { ListItem item = new ListItem("text1","value1"); item.Attributes["custom"] = "CustomValue"; ddl.Items.Add(item); } The html it renders:(which ...
Method for associating state information with an ASP.NET control?
What is the best method or best practice for associating state information with an ASP.NET control? The context is that I'm dynamically generating a user poll. I may have several polls to choose from that the user could answer. I will dynamically generate the label prompt, radio selections, validation, and submit button. Currently I am ...
asp.net store object class in viewstate (or other ideas)
Hi all, I've build a class like this: private class TestResults { public bool IsAdmitted { get; set; } public bool IsDuplicate { get; set; } public bool IsVerified { get; set; } } The values of this class are set at postback by clicking a radiobutton list. Problem however is I don't know how to save this values across...
Encrypted viewstate causes search to break in WSS 3.0
After setting the web.config attribute viewStateEncryptionMode to "Always", the following error is thrown when attempting to search using the standard search textbox: Unable to validate data. at System.Web.Configuration.MachineKeySection.EncryptOrDecryptData(Boolean fEncrypt, Byte[] buf, Byte[] modifier, Int32 start, Int32 length, IVTyp...
Is there any way of decoding all of that ViewState garbage that ASP.NET applications pass to the front end?
For instance I was looking at the request from a asp.net application and it passes a view state form variable when the form is submitted that looks like this: __VIEWSTATE:/wEPDwUJMzc4ODIxMTU4D2QWAgIBD2QWCgICDxYCHgRUZXh0BQVlbi1VU2QCBA9kFgICAQ8WAh4JaW5uZXJodG1sBTlDV0RTIC0gQ2VydGlmaWVkIFRBQS9XSUEgVHJhaW5pbmcgUHJvZ3JhbXMvUHJvdmlkZXJzIExpc3R...
Class with [Serializable] Attributute
Possible Duplicate: Does adding [Serializable] to the class have any performance implications? What is the drawback of this attribute? Many of my data objects (DTO) have this attribute because I use to store objects in ViewState. Is there any performance issue regarding this attribute? ...
Disabling viewstate on drop down list causes problems
Hi, I have a page that has two drop down lists on it and a button. All controls sit in an update panel. The first drop down list (ddl1) contains a lot of values which caused a huge viewstate so I disabled viewstate on it. In the page oninit event I populate the drop down list every time the page is posted back. This all seems to work ...
ViewState alternatives in ASP.NET Webforms
Are there any other ViewState alternatives? I've heard a lot Like Session, holding the state of some of the page's controls' state and getting destroyed the moment the user leaves the page. I know I'm describing ViewState itself, but I'm looking for a pattern of sorts or suggestions so I can avoid ViewState altogether. An example of...
Pulling data from Repeater with EnableViewState=false ... How/Alternative?
Gurus, So I am trying to avoid enabling EnableViewState... Sample code as you can see has 1 repeater and 2 textboxes inside. I bind the textboxes at page init. After a postback I want to get the updated data from the client & save in a db. The Request.Form contains the data keyed with autogenerated client ids but the repeater has 0 i...
Should a page with ViewState disabled still be validating a __viewstate field?
I have a shopping cart page (Cart.aspx) that has a button that will (sometimes) post to a third party payment gateway, if payment is necessary. The payment gateway will process the payment and then do a silent post to my website (Order.aspx) so I can update the order status. Order.aspx always throws an invalid viewstate error, even thou...
Recommendation for Viewstate abuse
I was going through Scott's list of .NET questions at http://www.hanselman.com/blog/WhatGreatNETDevelopersOughtToKnowMoreNETInterviewQuestions.aspx In a comment there is a scenario - You are reviewing an ASP.NET application and find that the viewstate is storing "id", which is being used for different unrelated purposes on different pag...
Menu State - ASP.Net MVC
In my ASP.Net MVC View, I have a menu. The menu consists of a number of Parent Items, with Child Items (anchor tags) underneath. I'm using JQuery to toggle the menu items opened and closed, as the user clicks on them. Unfortunately, once the user clicks onto an anchor tag, and gets sent to another page, the menu state is lost, and th...
Control added to a gridview in RowDataBound event does not exist after postback
I have a gridview that is bound to a datatable. Based on the value in a cell in a column, a linkbutton is added to the cell in RowDataBound. On the first load, everything works find but after postback the control is now gone. Why wouldn't the control itself be saved in the GridView Viewstate? I'm using VB.NET ...
Losing the viewstate
Hello, I'm storing a few of my properties in the viewstate, so I can use them easily on Ajax requests. My property code looks like this: public Language Language { get { return (Language)ViewState["controls_window_Language"]; } set { ViewState["controls_window_Language"] = value; } } However, my customers have reported some e...
Invalid viewstate when using RewritePath
Hello everybody, I have this in my global.asax void Application_BeginRequest(object sender, EventArgs e) { string pathAndQuery = Request.Url.PathAndQuery.ToString().ToLower(); if (pathAndQuery.Contains("prettyUrl")) { HttpContext.Current.RewritePath("Category.aspx?catg=uglyUrl"); } } it works fine, but I some...
Gallery/AdapterView Child Drawable State
I am using a Gallery view where the view corresponding to each item is non-trivial and consists of text as well as multiple buttons. When I click to drag the gallery view (somewhere not on one of the buttons) the button's drawable state changes to pressed and appears as if all of the buttons are currently being pressed. Additionally, th...
ViewState, QueryStrings and their effect on SEO
Well, to start with, I'm a novice ASP.Net/C# programmer, and had an experience only of a couple of projects during college and a couple of freelancing projects when I was recruited by a startup company to build their ASP.Net based website. I've just abut completed the website, and now since the company is not able to find a worthy enough...