RegisterForEventValidation can only be called during Render();

hi,
i also faced with the same problem before and finally with the following changes my problem solved.
please check

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Records.aspx.cs" Inherits="Records" 
MasterPageFile="~/Master.master"  EnableEventValidation="false" %>

public override void VerifyRenderingInServerForm(Control control)
    {
        /* Confirms that an HtmlForm control is rendered for the specified ASP.NET
           server control at run time. */
    }

hey just set viewstate false

//Turn off the view state
this.EnableViewState = False;
//Remove the charset from the Content-Type header
Response.Charset = String.Empty;

and
EnableEventValidation="false"

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" enableEventValidation ="false" Inherits="Default" %>

also add

public override void VerifyRenderingInServerForm(Control control)
{

}

Yes this is right we need to do the following:

1. .cs file add the following: //Change the Header Row back to white color
// HeaderRow-Style=#FFFFFF


// Style.Add("background-color", '#-d-f-5-015');


2. //.AS-PX file add the following:

// Enable-Event-Validation="false" inside <%@ Page directive

This makes it work like a charm!