VS 2005, ASP.NET with C#, Windows XP, II6 Hi, Please refer to the topic http://www.codeproject.com/KB/viewstate/SaveViewState.aspx. The topic demonstrates how you can save ViewState to a file system over server so as to make ViewState very small on roundtrips. The author had created a class BasePage by inheriting System.Web.UI.Page and...
I inherited an ASP.NET application that builds pages with massive viewstate values. As I have been working through it, I assumed I would be able to use Firebug to inspect the output and set breakpoints in the resulting client-side script. What I have found instead is that whenever Firebug encounters a large viewstate, it completely cho...
I have a lot of web controls created dynamically in an ASP.NET page. In certain postback scenarios (when I click a LinkButton), I want to skip the loading of the old tree of web controls and immediately generate the new tree. Unfortunately, when I generate the new tree, the viewstate of the old tree is loaded into it. I want to be able ...
Dear All, Help me how to solve this problem. Error Time : 20091104 151412 Error Message : Validation of viewstate MAC failed. If this application is hosted by a Web Farm or cluster, ensure that configuration specifies the same validationKey and validation algorithm. AutoGenerate cannot be used in a cluster. Source : Sys...
Hi all, Pls somebody help me with viewsate. Suppose i have created two forms. First form contains First name and Last name and one button called NEXT. And Second form contain two fields and two button like Back and Save. While i am entering some value in form1 pressing one NEXT button and redirecting to second page. There when i am press...
I'm getting errors in a few of my pages: Error Message: Invalid character in a Base-64 string. Error Source: mscorlib Error Target Site: Byte[] FromBase64String(System.String) Error Message: Unable to validate data. Error Source: System.Web Error Target Site: Byte[] GetDecodedData(Byte[], Byte[], Int32, Int32, Int32 ByRef) Error Messa...
I have code like the following in a UserControl: Protected Overrides Sub Render(ByVal writer As System.Web.UI.HtmlTextWriter) If someCondition Then childControl.Enabled = false End If MyBase.Render(writer) End Sub Whenever someCondition is true and childControl.Enabled is set to false during the Render event, the ...
This has me totally puzzled, can anyone explain this? Markup: <form id="form1" runat="server"> <asp:TextBox runat="server" ID="txtTest" /> <asp:PlaceHolder runat="server" ID="PlaceHolder1" /> <asp:Button runat="server" Text="Click" /> </form> Code Behind: protected void Page_Load(object sender, EventArgs e) { txtTest.Tex...
I have an app where I need to dynamically choose an SQLDataSource for a GridView so I can use 1 of 2 stored procedures, depending on who is logged into the system. My problem is that I am using logic like this, in the button click... If Session("SiteType") = "Type1" Then GridView1.DataSourceID = "SqlDataSource2" Else GridV...
Example I have a gridview having multiple customers. When a user clicks on the customer link then the CustomerId is stored in the Session "CustomerId". if i open multiple customer details on multiple tabs then the Session "CustomerId" is overwritten. so it does not make sense to store customerid in the Session. I just want to store c...
I'm doing some brainstorming for a portal framework, and I'm envisioning a breadcrumb navigation stack that is tracked via the ViewState (so that if the user clicks "back" in their browser and clicks some other link, the breadcrumb trail will depart from the right page). My pages are really just ascx controls that get loaded into a plac...
I am getting the follwing error,please tell me why this error is coming Validation of viewstate MAC failed. If this application is hosted by a Web Farm or cluster, ensure that <machineKey> configuration specifies the same validationKey and validation algorithm. AutoGenerate cannot be used in a cluster. ...
On postback: How can I access ASP.NET controls in my code-behind file, which are added programmatically? I am adding a CheckBox control to a Placeholder control: PlaceHolder.Controls.Add(new CheckBox { ID = "findme" }); Controls added in the ASPX file are showing up fine in Request.Form.AllKeys except the ones I add programatically. ...
In my ASP.NET application, I am loading an .ascx dynamically using LoadControl, using the following pattern: var ctrl = LoadControl("/path/to/control.ascx"); ((ControlType)ctrl).SomeProperty = someData; placeholder.Controls.Add(ctrl); The control that I add saves the SomeProperty property value directly to ViewState, as follows: publ...
I can't for the life of me work out what I am doing wrong here, despite much searching on SO/Google. Basically I have a simple DataTable which is held in ViewState and adjusted during postbacks. When I try to write out the values, it is just an empty string. Please find below an abbreviated example of what I have - the output in this ca...
The problem that I am having is as follows: I currently have a custom class that generates buttons and places them on a placeholder on a master page. The events for these buttons put specific values into session that differs values for a database query. In essence, the buttons serve as filters for charts. After creating all the button...
I am using framework 2.0, and I don't understand how the datagrid and the datasets works after doing a postback. In msdn says that there's no need to do a databind again if the request is a postback. But my question is: how the datagrid shows again the records if there is no databind? I supose that asp.net saves in a cache the query resu...
Im not sure why is this happening but there is a piece of viewstate being shown on the top of my page with its closing tag. I believe is just happening when there is some javascript code in the page, but is quite odd because has nothing to do with the ViewState at all. Anybody knows anything about this? Thanks, Leonardo ...
Having a very strange issue regarding postback in ASP.NET. I have page dynamically populating DropdownLists on Page_Load, only if it's not a postback. I also have several textboxes on the page for user input. If I postback, either by clicking a submit button or via a SelectedIndexChanged event, the textboxes maintain their values, but t...
I have a class, Questionnaire, which contains a collection class that wraps a generic list, EntityCollection. I am using ViewState to persist the Questionnaire and its collection of Questions. I am using custom type converters to reduce the ViewState size. Everything works without a type converter for EntityCollection. Would things wo...