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invalid viewstate

Posted By:      Posted Date: September 07, 2010    Points: 0   Category :SharePoint
Hi I am getting error when i try to edit or modify web part on page. System.Web.UI.ViewStateException: Invalid viewstate. Client IP: Port: 1133 User-Agent: Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 5.1; Trident/4.0; .NET CLR 2.0.50727; .NET CLR 1.1.4322; .NET CLR 3.0.4506.2152; .NET CLR 3.5.30729; InfoPath.2) ViewState: 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... ---> System.Web.HttpException: Unable to validate data. at System.Web.Configuration.MachineKeySection.EncryptOrDecryptData(Boolean fEncrypt, Byte[] buf, Byte[] modifier, Int32 start, Int32 length, IVType ivType, B

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Invalid viewstate - AGAIN.

I'm getting 100+ errors per day on my website with System.Web.HttpException: Invalid viewstate. at System.Web.UI.Page.DecryptStringWithIV The website is asp.net 3.5 running on iis6 , not running in a web-garden/web-farm , single server. The website is using xhtml doctype. viewstate size vary from 2kb-20kb Here are a few sample errors.Machine: ML Framework Version: 2.0.50727.3603 Assembly Version: 6.5.3664.33889 Source: http://www.domain.com/WebResource.axd?d=z5VmXXoSLLpQHoPictureAlert Exception: System.Web.HttpException: Invalid viewstate. at System.Web.UI.Page.DecryptStringWithIV(String s, IVType ivType) at System.Web.Handlers.AssemblyResourceLoader.System.Web.IHttpHandler.ProcessRequest(HttpContext context) at System.Web.HttpApplication.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() at System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) Machine: MLFramework Version: 2.0.50727.3603 Assembly Version: 6.5.3664.33889 Source: http://www.mydomain.com/ScriptResource.axd?d=SE0Ej7OlEAx91j2Cjv_6KkRPplqT-5wB4M7CZPdGdGn3LahLwqlRPApUcdxBsbFXYHZ91Q76FHAHWgHs8SmOC4zemr7 siym0QY0rF3XtJTu%3C/a%3E%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%3Ca%20id= Exception: System.Web.HttpException: Invalid viewstate. at System.Web.UI.Page.DecryptStringWithIV(String s, IVType ivType)

System.Web.UI.ViewStateException: Invalid viewstate.


I had to switch to

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What would cause an Invalid viewstate?


I'm seeing page failures and all the information I have is Invalid Viewstate.  What would cause this?

Composite Control which contains arbitrary content defined in .aspx of parent and thier ViewState


I want to write own control which can contain other. And I want to define content of the control in the .aspx file where the control is defined. I have written such control. But now I have issue with ViewState of inner controls of my control. The following samle illustrates the issue: I defined two asp:DropDownList ID="ddl1" and ID="ddl2" One of them is inside of my control and other is outside. When posback is occurred asp:DropDownList ID="ddl1 loses state and becomes empty. How to say ASP.net to store state of inner controls defined by this way?


<%@ Control Language="C#" AutoEventWireup="true" CodeBehind="MyControl.ascx.cs" Inherits="DynamicControls.Controls.MyControl" %>

<div class="box">
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        <div class="Header-Right">
            My Control
    <div class="Content">
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Invalid length for a Base-64 char array for my coding in ASP.net C#. How to solve it ?


Hi Friends ,

I have done encrypted password and decode but i got error  like  this  " Invalid length for a Base-64 char array" .

Pls help . Thanks


psswd = txtPassword.Text;

pwed = base64Decode(psswd);

public string base64Decode(string sData)
            System.Text.UTF8Encoding encoder = new System.Text.UTF8Encoding();
            System.Text.Decoder utf8Decode = encoder.GetDecoder();
            byte[] todecode_byte = Convert.FromBase64String(sData);
            int charCount = utf8Decode.GetCharCount(todecode_byte, 0, todecode_byte.Length);
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EntityDataSource Where Clause in ViewState?



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But: After the Paging-Postback the Value for Where is gone (empty string) whereas the WhereParameters are still there. Isn't the where value saved in ViewState as well? Can I change this behaviour?

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I want to know that when we create custom controls, then is there State Management through ViewState done automatically or we have to handle it explicitely ?Since i have created Custom Controls that is behaving as if it is not maintaining its state on PostBack.

Linq2Sql error: "Invalid attempt to call Read when reader is closed."


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How to CATCH "Invalid postback or callback argument" exception?



How can I catch this exception? I do not want it to stop my page execution. Can/Should I do that?

Server Error in '/' Application.
Invalid postback or callback argument.  Event validation is enabled using <pages enableEventValidation="true"/> in configuration or <%@ Page EnableEventValidation="true" %> in a page.  For security purposes, this feature verifies that arguments to postback or callback events originate from the server control that originally rendered them.  If the data is valid and expected, use the ClientScriptManager.RegisterForEventValidation method in order to register the postback or callback data for validation.
Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.

Exception Details: System.ArgumentException: Invalid postback or callback argument.  Event validation is enabled using <pages enableEventValidation="true"/> in configuration or <%@ Page EnableEventValidation="true" %> in a page.  For security purposes, this feature verifies that arguments to postback or callback events originate from the server control that originally

WebResource.axd - Padding is invalid and cannot be removed error



I'm working on a site that is hosted externally, and the admin just sent me an email syaing they're getting this following error:


Event code: 3005 

Event message: An unhandled exception has occurred.

Event time: 11/17/2008 8:11:24 AM

Event time (UTC): 11/17/2008 8:11:24 AM

Event ID: 5d3b54c09a24463ca8fb03f22692e0bb

Event sequence: 731

Event occurrence: 3

Event detail code: 0

Application information:

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Application Path: D:\....

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Process information:

Process ID: 2272

Process name: w3wp.exe

Account name: ****

Exception information:

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Request information:

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Invalid URL"" after copy or move a document.



We have an website that have 3 libraries. The "first Library" is used only to edit documents and it's called "my documents". When a user finish of edit your documents here, they start a workflow that will check fields in the document and move the document for the second library (using Sharepoint Designer Workflow - without custom actions).
In "second library" we have a big workflow. This WF has some steps for approve, collect feedback, generate sub-tasks and others things related for the document. This WF use many custom actions in (Sharepoint Designer).
When this WF arrives to the end, the document is moved to "third library", that is a official repository of documents in the enterprise.
The entire cycle works fine. But when someone creates a internal copy of the document in the "first library" to begin again the flow, we receive a Invalid Url error. It occurs when any update operations is executed over the document item, the value is conserved but the error is displayed. After it, we can not execute other workflows over the item.
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User group invalid for new document



Defined a user group and a site column of type people/group directing to this group.

Also defined a content type and added the site column to this content type.

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Invalid web service call, missing value for parameter: \u0027prefixo\u0027 (AutoCompleteExtender)


Good afternoon.

I'm trying to put an AutoCompleteExtender working, but i'm having an error, that i discovered with Fiddler, that is the reason that the autocomplete doesn't work:

> **{"Message":"Invalid web service call,
> missing value for parameter:
> \u0027prefixo\u0027."**,"StackTrace":"
> at
> System.Web.Script.Services.WebServiceMethodData.CallMethod(Object
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> at
> System.Web.Script.Services.WebServiceMethodData.CallMethodFromRawParams(Object
> target, IDictionary`2 parameters)\r\n
> at
> System.Web.Script.Services.RestHandler.InvokeMethod(HttpContext
> context, WebServiceMethodData
> methodData, IDictionary`2
> rawParams)\r\n at
> System.Web.Script.Services.RestHandler.ExecuteWebServiceCall(HttpContext
> context, WebServiceMethodData
> methodData)","ExceptionType":"System.InvalidOperationException"}

This is the webservice code:

    Imports System.Web.Services
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viewstate in a custom control

I am having issues with a simple custom control that I created by subclassing the hyperlink control.

I wanted to create a control called BackLink that would automatically grab the referring url to the page when it first loads the page. and on postbacks it would continue to use the initial value

I am able to capture and set the navigateurl property when the containing page first loads just fine but if the page submits to itself, the control loses its navigateurl value.

I have the enableviewstate property set in the aspx page but it doesn't seem to want to keep its viewstate

Am I missing something? Do I have to manage my own ViewState?

here is my code

public class BackLink : System.Web.UI.WebControls.HyperLink

public BackLink()
this.Text = "<< back";

protected override void Render(HtmlTextWriter output)
if (this.Page.IsPostBack == false)
//save back url
Uri _backUri = this.Context.Request.UrlReferrer;

if(_backUri != null) this.NavigateUrl = _backUri.PathAndQuery;

else this.NavigateUrl = "/";

System.InvalidOperationException: Invalid attempt to read when no data is present.


Invalid attempt to read when no data is present.

Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code. 

Exception Details: System.InvalidOperationException: Invalid attempt to read when no data is present.

Source Error: 

Line 53:             if (reader.HasRows)
Line 54:             {
Line 55:                 Response.Write(reader.GetString(0));

Here is my code:

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