Postback issue

In my page, there are a lots of toolkit controls and gridvidw. Sometime when I postpack partially inside a UpdatePanel, I got the following message in a popup message box:

Invaid postback or callback argument. Event validation is enabled using <pages enableEventValidation="true"/> in configuration or <% Page EnableEventValidation="true" %> in page. For security purposes,this fuature verifies that arguments to postbalc or callback events originate from the server control that orginally rendered them. If the data is valid and expected, use the ClientScriptManager.RegiterForEventValidation method in order to register the postback or callback data for validation.

For example, in gridview with paging, when I click on page numnber, sometimes the above message will come out. It comes out randomly. If I refresh the page, it will fix this issue.

How to solve this issue?

The pics you posted are not visible.

A potentially dangerous Request.Form value was detected from the client (ctl00$ctl00$ctl00$ctlToAdd1$ctl00$ctlHeaderFooter$ctl00$txtPageHeader="<p>DO NOT ATTEMPT TH...").

Description: Request Validation has detected a potentially dangerous client input value, and processing of the request has been aborted. This value may indicate an attempt to compromise the security of your application, such as a cross-site scripting attack. You can disable request validation by setting validateRequest=false in the Page directive or in the configuration section. However, it is strongly recommended that your application explicitly check all inputs in this case.

Exception Details:System.Web.HttpRequestValidationException: A potentially dangerous Request.Form value was detected from the client (ctl00$ctl00$ctl00$ctlToAdd1$ctl00$ctlHeaderFooter$ctl00$txtPageHeader="<p>DO NOT ATTEMPT TH...").

Source Error:

[No relevant source lines]

Source File:c:\WINDOWS\Microsoft.NET\Framework\v2.0.50727\Temporary ASP.NET Files\siteseasytest\b32181f7\172c3a32\App_Web_yzjzpobg.2.cs Line:0

Stack Trace:

[HttpRequestValidationException (0x80004005): A potentially dangerous Request.Form value was detected from the client (ctl00$ctl00$ctl00$ctlToAdd1$ctl00$ctlHeaderFooter$ctl00$txtPageHeader="<p>DO NOT ATTEMPT TH...").]

System.Web.HttpRequest.ValidateString(String s, String valueName, String collectionName) +3219550

System.Web.HttpRequest.ValidateNameValueCollection(NameValueCollection nvc, String collectionName) +108

System.Web.HttpRequest.get_Form() +119

System.Web.HttpRequest.get_HasForm() +57

System.Web.UI.Page.GetCollectionBasedOnMethod(Boolean dontReturnNull) +2025201

System.Web.UI.Page.DeterminePostBackMode() +60

System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +6953

System.Web.UI.Page.ProcessRequest(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +154

System.Web.UI.Page.ProcessRequest() +86

System.Web.UI.Page.ProcessRequestWithNoAssert(HttpContext context) +18

System.Web.UI.Page.ProcessRequest(HttpContext context) +49

ASP.communitydefault_aspx.ProcessRequest(HttpContext context) in c:\WINDOWS\Microsoft.NET\Framework\v2.0.50727\Temporary ASP.NET Files\siteseasytest\b32181f7\172c3a32\App_Web_yzjzpobg.2.cs:0

System.Web.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +154

System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) +64

Jason, If you are using code behind to control what gets added to a PlaceHolder for instance...

In ATLAS - we simply issued the

UpdatePanelModal.Update();

Because viewstate would get mucked up. (Article on my blog about this)

In Beta - I find that anytime you issue that command - it causes the error ... I think when mode is conditional - it works but not sure - as I am being forced to use always due to databound controls dissapearing on a modal popup and have not heard any feedback on the issue...

If you are not using code behind to handle - can you post a simple code example that demonstrates the issue?

Jason, I have written down the message text in message box. Forget the pic.

jodywbcb, what's your post for my question?

Problem In Deploy

Hello,

Whenever I try to deploy and Run an ATLAS web I get following error in Web.config File...

Parse Error Message: unrecognized attribute 'type'

Line 15 : <sectionGroup name="microsoft.web" type = "Microsoft.web.configuration.MicrosoftWebSectionGroup">

I tried to create Website in Both FileFormat and HTTP. In both method I get the Same Error Message.

Have you checked whether the ASP.NET version of your web application is set to 2.0? You would get this message if your application is set to use ASP.NET 1.x, because the type attribute did not exist on the sectionGroup element in v1.x.

Thanks,

Hi,

It works...
I have just changed the version and Application Pool to ASP.NET 2.0.

It works Nice...

Thank u...

Problem in redirection

I have a problem plz help me to sort out it

i am displaying an alert message by java script on page event.

now if user click on the "ok" button of alert then user should navigate to other page other wise not.

if i place Response.Redirect after

"ScriptManager.RegisterClientScriptBlock(this,this.GetType(),"myScript","alert(\"Your registration has been submitted and is waiting for approval from administrator. After approval/denial you will be notified at the provided email address.\");",true);"

it does not show the alert

what should i do to resolve it

help me

try this..

in html

<htmlxmlns="http://www.w3.org/1999/xhtml">

<headrunat="server">

<title>Untitled Page</title>

<scriptlanguage="javascript"type="text/javascript">

function showmsgbox()

{

alert("hi");

}

</script>

</head>

<body>

<formid="form1"runat="server">

<div>

<asp:ButtonID="Button4"runat="server"OnClick="Button4_Click"Text="Button"OnClientClick="showmsgbox()"/></div></form>

</body>

</html>

and in code behind..

protectedvoid Button4_Click(object sender,EventArgs e)

{

Response.Redirect("~/Default8.aspx");

}