Hello, On my page I’ve defined controls TextBox1, Label1 and GridView1. Inside GridView1 I’ve defined the following template: <asp:TemplateField> <ItemTemplate> <asp:LinkButton runat="server" Text="Edit" CommandName="Edit" ID="cmdEdit" /> </ItemTemplate> ...
I know how to have an editable GridView along with a SqlDataSource in which each edit (update/insert/delete) is immediately persisted to the database (using the SqlDataSource's UpdateCommand, Insertcommand, etc). What I need now is to have an editable GridView that maintains all edits in viewstate until the user presses a "Save" button...
Ok, my masterpage has a dropdown which controls size which affects a lot of things. I need to access the dropdown index from content pages so I do it using this code. public partial class MasterPage : System.Web.UI.MasterPage { public DropDownList MySize { get { return _ddlSize; } } } I am using Ajax and when the size changes the menu...
Any practical tips/tricks on how to do that? It doesn't seem that there is a lot of information about how to do that. I am loading data from the database into TreeView and the max number of nodes will be around 100. I am still interested in minimizing the ViewState. I will also be adding and deleting nodes dynamically (though the user...
Here is what I am trying to do. I have a TreeView server side control (asp.net 2.0) and I need the user to be able to add nodes to it, then after all the nodes desired are added, the data should be saved to the database. Here are some things I would like to pay attention to: 1) I don't want to save the tree data each time the new node ...
We are writing a proxy cache for a .NET application, and we are having problems with the ViewState MAC on the proxy. We have disabled the MAC Validation in order to get pass over this issue, but is not the best way to go (for security reasons). Is there a way to compute the ViewState MAC on the proxy in order to pass the validation? ...
Greetings, hopefully there is a simple solution for this complex problem. Please correct any misconceptions I have along the way. A while ago I wrote a GrivView with dynamic column capability. The columns are added in the OnInit page event so that they are added BEFORE the viewstate is applied. They are reapplied on every posting in...
Hi, I try to create a ItemTemplate for my Repeater with a tree of child controls inside an ItemTemplate. The problem is I can't find a way to persist all my controls. Each time that there is a postback, my controls are lost. I tried many things but I didn't find a way. Is anybody can help me? Here is the code that I use : Here where ...
Hi! I have a website in asp.net 2.0 with default membership provider. It was fine til yesterday. When i add custom google search box in my website now i am getting the same error Validation of viewstate MAC failed. If this application is hosted by a Web Farm or cluster, ensure that configuration specifies the same validationKey and vali...
So basicaly I am working on a site that is attempting to be optimized for phones (This includes pretty much any browser enabled phone) Due to the nature of the site, I want it to load as quickly as possible. At this point, I think the page is around 30k or so in size. Now I am using viewstate, mostly for things like datagrids and not ...
In all my Page_Load() events I have to do a if(!IsPostBack) { //code runs on initial get //Set properties backed by viewstate } else { //Code runs on each get and post //Set properties backed by ordinary fields } Is there any quick way to determine this short of reflector, reading documentation, or creating a test page? Is i...
I have very little to go on here. I cant reproduce this locally, but when users get the error I get an auto email exception notification. Message: Invalid length for a Base-64 char array. Call Stack: at System.Convert.FromBase64String(String s) at System.Web.UI.ObjectStateFormatter.Deserialize(String inputString) at System.Web.UI.Obje...
When is safe to disable viewstate? For wich controls? Under what circunstamces? In a user control I have disabled viewstate, but if I attempt to click in this control <asp:LinkButton ID="LinkButton1" runat="server" CommandName="Delete" OnClientClick="return confirm('¿Está seguro que desea eliminar el mensaje?');" EnableViewStat...
EDIT 2: Well, I went to the code. Note what they are doing here. They are saying load viewstate, and then turning around and setting the Text property to what was in the viewstate. After LoadViewState is called though viewstate tracking is on, and that results in the behavior I'm seeing. I think what the code should say is: if (s != Tex...
I disabled viewstate in the web.config file (and there's no EnableViewState = true anywhere on the pages), but despite this, the pages are rendered with a quite large view state (8k for a 40k page). I checked the viewstate contents with a viewstate decoder and discovered that the multiview controls I'm using on my pages are the guilty on...
An ex-colleague developed an application that was pretty much an editable grid (think timesheet). MS Ajax was used for it and the grid was wrapped in an Update panel. To make things worse the complex object graph was being saved to viewstate so every time the page refreshed i.e. a cell was updated, all the grid and viewstate would ...
I apologize if the same question was asked already. I just couldn't find. Please point me to the correct question and I close this one. Can you suggest any tool that can help me to analyze ASP.NET ViewState? Thank you ...
Hi I have a web app using forms authentication. When I perform the following steps Let the login cookie expire Click on a link that requires a logged in user The user is redirected to the login page Click the browser back button The user is redirected to the login page again Log in using a valid username/password I get this exceptio...
I have a class that is marked as serializable and have no problem storing it in the Session but when I attempt to save it in the ViewState I get: Sys.WebForms.PageRequestManagerServerErrorException: Error serializing value ...
I have a page which the user gets shown when he wants to create a new or edit an existing document. There are two UserControls on the page. One simple DatePicker and a more complex grid. After filling out or editing the data he then can press continue which brings him to the review page where he can decide to really create or update the ...