Easy way to simulate Invalid Viewstate?
Is there an easy way to simulate Invalid Viewstate? ...
viewstate
Keeping ViewState in SessionPageStatePersister
I want to keep viewstate of a specific page in session but following code block does not help me, what might I be missing? So here is the code-behind file content of my page; public partial class ConfigurationEditorWebForm : PageBase { protected void Page_Load(object sender, EventArgs e) { } pro...
Submit a registration form remotely
A client of mine is needing their current website to tie into an online leasing module off site. The module needs to be accessed from our website by posting the username and password hash to it, or the registration information. It works when I copy the view state manually from the source into the form they fill out on our system, but n...
What ASP.NET Web Controls implement IPostBackDataHandler?
Could someone point me to a list of controls that implement IPostBackDataHandler? I want to know what controls implement this interface and what properties the controls will set during the Postback. For example: Textbox : Text DropDownList : SelectedIndex I'm basically looking for a list of properties that will not be saved ...
ICallbackEventHandler and ViewState
Does anyone know if viewstate is available when using ICallbackEventHandler? If not is there any work around to get it? Thanks. ...
ASP.net ViewState - Even when disabled, some viewstate exist. Why?
Even when on the page, the EnableViewState property is disabled, I am still seeing some viewstate existing on the page: "<input type="hidden" name="__VIEWSTATE" id="__VIEWSTATE" value="VkBAB3n5LZYtY+nTzk1vEu1P/6QLf4qzFIKzpFRJe3DMf8UseUA/1RsO409HJX4QhkROSP0umoJvatjK/q+jXA==" />" My question is why? ...
ViewState or HiddenField
If I have a simple piece of data to store (an integer or string for example) I might choose to store that in ViewState, or using a HiddenField control. Why would I choose one over the other? ViewState Hard for the user to decode (thought not impossible), which might be desirable HiddenField Value can be used in JavaScript Are t...
What are your thoughts on this article about ViewState v.s Cache?
I was looking at this article from 2005 and wanted to get some thoughts on it, advantages and disadvantages that the article does not point out about ViewState and Cache? http://www.codersource.net/asp_net_viewstate_versus_data_caching.aspx ...
Cache v.s Session
What is the difference between storing a datatable in Session v.s Cache? Advantages and Disadvantages? So if it is a simple search page which returns results in a datatable and binds to a gridview. If user a searches and user b searches, is it better to store it in Session since each user would most likely have different results or ca...
What are the possibly situations that .net Viewstate could stop working?
Consider the following code: Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Init If Page.IsPostBack Then If ViewState("test") IsNot Nothing Then Response.Write((ViewState("test").ToString)) Else Response.Write("Viewstate is empt...
How can I take more control in ASP.NET?
I'm trying to build a very, very simple "micro-webapp" which I suspect will be of interest to a few Stack Overflow'rs if I ever get it done. I'm hosting it on my C# in Depth site, which is vanilla ASP.NET 3.5 (i.e. not MVC). The flow is very simple: If a user enters the app with a URL which doesn't specify all the parameters (or if an...
Switched to ASP.NET 3.5, DropDownList doesn't remember dynamically added items
I have a site that uses a couple DropDownLists that are databound. I was also doing the traditional if (!IsPostBack) {list.Databind();} and relied on viewstate to keep the lists filled during a post back. I recently converted the site to ASP.NET 3.5 and noticed that the lists are empty during postback (as if ViewState is disabled). I did...
Best way to simulate 'SelectedIndexChanged' for ASP.NET DropDownList control with ViewState disabled
I've found many posts where people try to work around the problem of SelectedIndexChanged not working when EnableViewState='false'. Im a little confused why control state doesnt kick in and allow it to work, but thats bonus points if anyone can explain that too. Some of the 'hacks' are pretty 'hacky'. Like setting a value on the views...
How to persist ViewState for reuse later?
Is it possible to save ViewState information, e.g. to session, so that when you navigate away from the page it is persisted somehow? Then when you return to that page you can reload the view state and the choices you've made are preserved. Background I have two pages, a report page, where you can pick data, do some filtering and sorti...
DropDownList OnSelectedIndexChange to 0th index w/out ViewState
I did follow the article TRULLY Understanding ViewState (great article btw) and populating my drop down list is working great. I've even setup a OnSelectedIndexChange event which fires almost as great. The problem I've found is the SelectedIndexChanged event won't fire when selecting the 0th index. It does all other times however. ...
C# asp.net build SQL Query dynamically from viewstate
Hi all, On my C# asp.net webform I have a search page that has roughly 20 elements that "could" be used as part of the search. There will be more added later. What I have done is extend the textbox and dropdown listbox to include a few variables: fieldname: Tablename.columnname dbtype: DbType.Int32 Joinparam: LEFT Join on otherTable ...
Why do event handler methods randomly stop working?
Why would an event handler work one day, and then stop working the next day without any code changes? I have run into the problem many times, but always have to play around and somehow the event handler magically works again. Below is an example where this happened to me again today. Do you know a quick way to fix this type of problem...
Invalid viewstate for ScriptResource.axd?
The Script Resource and the Web Resource files are generating intermittent errors in my application. I have been trying to chase the cause of the problem but to no avail. I notice that the “d” parameter that is passed is some how corrupted and I can’t for the life of me figure out what’s causing this parameter to be corrupted. I noticed ...
asp.net what to use instead of viewstate
Currently I am using the viewstate just to store the current page number I am on while paging through data. I have 3 controls on the page that have data I can page through. So far the easiest way to keep track of the page number is the viewstate but it's getting really big and I have no idea why. So I would like to use something else t...
What is the best practice for changing view states?
I have a component with two Pie Charts that display percentages at two specific dates (think start and end values). But, I have three views: Start Value only, End Value only, or show Both. I am using a ToggleButtonBar to control the display. What is the best practice for changing this kind of view state? Right now (since this code was in...