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• Validation of viewstate MAC failed - MVC

  - by Nettuce

  This gave me a WTF moment recently. MVC? Viewstate? Eh!? All was fine on the dev server, but as soon as I deployed to the web farm this error appeared every time I recycled the app pool. It turns out it was the cookie created by <%= Html.AntiForgeryToken() %> and simply generating a machine key sorted it out.…

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• How can I clear viewstate of a dropdownlist inside a usercontrol? Should I?

  - by tbilly

  I have a web user control with a dropdownlist inside of it. When the usercontrol's databind event is called, it automatically fires the dropdownlists databind event. In the dropdownlist's ondatabound event handler an 'other' option is appended to the end of the dropdownlist. The usercontrol is loaded multiple times, depending…

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• Question on Viewstate

  - by ScG

  I have a couple of pages that are bulky due to the viewstate. I have following question: is there any tool that can track viewstate of individual control on page and tell me which control is taking maxm viewstate also can i know which controls viewstate is not being used and disable it?

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• Web Application : How to upload multiple images at a time

  - by SAMIR BHOGAYTA

  //First add image control into the web form how many you want to upload images at a time //Add one button //Write the below code into the button_click event if (FileUpload1.HasFile) { string imagefile = FileUpload1.FileName; if (CheckFileType(imagefile) == true) { Random rndob = new Random(); int db = rndob.Next(1, 100);…

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• Is there a tool to get the ViewState byte count for any of the major browsers?

  - by Josh Kodroff

  I am looking for a tool to give me a byte count of ViewState after each postback (full or partial) to make sure that I'm not keeping any controls' states around unnecessarily. Is there a tool out there?

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• ASP.NET MVC: How to create a basic Pseudo Viewstate? Or better solution?

  - by Mark Redman

  I am newish to MVC and understand all the great things about it, including the reasons why voewstate isnt available, however there are some circumstances where I think having some kind of view state will be quite handy, In my case I am thinking about list pages with various search filters that can be applied to the list. …

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• Do invisible controls and their children on an ASP.NET page contribute to viewstate?

  - by Mr. Jefferson

  I have an ASP.NET page that has about 40 custom controls embedded in it. The controls vary in size; in their .ascx files, the biggest is about 1,500 lines and the smaller ones are between 100 and 200 lines (markup, script, etc). Each control is contained in a Panel. Only one of these panels is ever visible at any one…

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• NGINX Cache Viewstate and Cookies

  - by user42833

  We are running NGINX 7.65 on a Ubuntu 10 server. NGINX is setup as a reverse proxy to an IIS website where the viewstate is passed through the headers. We want to set up the cache feature in NGINX but need to make sure it does not mess up the viewstate and cookies associated with each individual customer. Will…

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• sorting a gridview in class

  - by user175084

  ok i have a project which has many gridview in its pages... now i am sorting the fridveiw using the sorting function like this: protected void GridView1_Sorting(object sender, GridViewSortEventArgs e) { DataTable dt = Session["TaskTable2"] as DataTable; if (dt != null) { …

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• Nested Usercontrols and ViewState

  - by Bob Smith

  I have a UserControlParent that dynamically loads UserControlChild. In the UserControlChild, I store a value using the ViewState object by doing a ViewState["count"] = myCount; On Postbacks, the ViewState returns a null. Is this because the UserControlChild is being loaded dynamically? If it helps, the…

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• Why can't i access page viewstate in usercontrol?

  - by Rohit

  I stored a object in viewstate on Page. Now when i access the same viewsate object on usercontrol,it shows as null. I even tried creating the same viewstate with same name in usercontrol and page.Both holds different value. I understand that viewstate is a protected property. How does this thing implement…

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• viewstate in asp.net

  - by jammkie same

  What all properties are stored in ViewState in ASP.NET

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• How Viewstate crashes in the browser in asp.net

  - by picnic4u

  What is ViewState in the Asp.net.How Viewstate crashes in the browser.what is the solution when Viewstate crash?in my code when i peak pk_id from view state then it's for some time and not work sometime also.

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• Gridview SortExpression with 2 fields

  - by aron

  Hello, I have a GridView that get's its datasource from a complex object. So I'm doing the Sorting & Paging in the code behind. <asp:GridView ID="SystemsDetailList" runat="server" AllowSorting="true" AllowPaging="true" AutoGenerateColumns="False" ShowFooter="True"…

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• how to change a button into a imagebutton in asp.net c#

  - by sweetsecret

  How to change the button into image button... the button in the beginning has "Pick a date" when clicked a calender pops out and the when a date is selected a label at the bottom reading the date comes in and the text on the button changes to disabled... i want to palce a…

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• ViewStateMode in ASP.Net 4.0

  - by sreejukg

  When asp.net introduced the concept of viewstate, it changed the way how developers maintain the state for the controls in a web page. Until then to keep the track of the control(in classic asp), it was the developer responsibility to manually assign the posted content…

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• Compressing ASPX pageview in code or compress HTTP in IIS?

  - by DDiVita

  In the past, with pages with large viewstate I have overridden the PageStatePersister class so when the state is saved I compress it. On Load I decompress it. I have haven't really thought about it, but could IIS handle something like this better? The reason I did this…

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• ASP.NET MVC Validation of ViewState MAC failed

  - by Kevin Pang

  After publishing a new build of my ASP.NET MVC web application, I often see this exception thrown when browsing to the site: System.Web.Mvc.HttpAntiForgeryException: A required anti-forgery token was not supplied or was invalid. --- System.Web.HttpException:…

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• ViewState in ASP.net

  - by user8965

  Hi All, Can anybody explain ViewState(in ASP.NET) as short as possible.

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• Viewstate seems to be hijacked inadvertently

  - by dvr

  Hi, we are using asp.net 2.x, we use session state stored in sql server, 2 web servers in loadbalance, iis6. our issue is that in the last 3 months we have had 2 cases where some one using our enquiry form has seen someone else's info e.g. first name and…

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• different between viewstate and sessions?

  - by Surya sasidhar

  hi, i want to know what is the difference between viewstate and sessions. thank you

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• Padding is invalid and cannot be removed

  - by Ajay

  I have hosted an asp.net 2.0 site. Everyday, i am getting an error "Padding is invalid and cannot be removed" 2-3 times. Backend used is sql server 2005. the site is controlled via plesk 9.2 CP. Pooling is enabled with timeout as 120 Minutes, in IIS.…

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• ViewStateMode property in Asp.Net 4.0

  - by AspOnMyNet

  I haven’t yet started learning Asp.Net 4.0, but I did read a bit on ViewState, where there is a new property ViewStateMode. In earlier versions of Asp.Net, if parent control had its ViewState disabled, then child controls also had their ViewState…

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• How to get selected values from a dynamically created DropDownList Array after PostBack (Button Click)

  - by user739280

  I have a CheckBoxList that contains Employee Names on a Wizard Step. When employees are selected and the active step is changed, the Wizard1_ActiveStepChanged function is called and it dynamically creates a DropDownList Array for each employee…

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• Is there any other way to store data in web application

  - by carter-boater

  We use ViewState to store data that is being edited by users. However, ViewState just go to large so we really want something that is faster than that. We considered session, but it has to be manually collected when users travel among pages. …

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