i try to do a simple log in page
but i encounter an error anyone can help?
this is the error msg:
Server Error in '/CPM project' 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 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.
Source Error:
An unhandled exception was generated during the execution of the
current web request. Information regarding the origin and location of
the exception can be identified using the exception stack trace below.
Stack Trace:
[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 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.]
System.Web.UI.ClientScriptManager.ValidateEvent(String uniqueId, String argument) +358
System.Web.UI.Control.ValidateEvent(String uniqueID, String eventArgument) +108
System.Web.UI.WebControls.TextBox.LoadPostData(String postDataKey, NameValueCollection postCollection) +22
System.Web.UI.WebControls.TextBox.System.Web.UI.IPostBackDataHandler.LoadPostData(String
postDataKey, NameValueCollection postCollection) +11
System.Web.UI.Page.ProcessPostData(NameValueCollection postData, Boolean fBeforeLoad) +381
System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boo
this is my login page code
<%@ Page Language="VB" masterpagefile="~/MasterPage.master"%>
<asp:Content ID="Content1" runat="server" ContentPlaceHolderID="ContentPlaceHolder1">
<form id="form1" >
<div>
<br />
<asp:Login ID="Login1" runat="server" style="z-index: 100; left: 12px; position: absolute; top: 336px">
</asp:Login>
<asp:LoginStatus ID="LoginStatus1" runat="server" style="z-index: 102; left: 341px; position: absolute; top: 439px" />
</div>
</form>
</asp:Content>
this is my master page code
<%@ Master Language="VB" %>
<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
<title>Untitled Page</title>
<script language="javascript" type="text/javascript">
<!--
function IMG1_onclick() {
}
// -->
</script>
</head>
<body>
<form runat=server>
<img src="App_Themes/lanai/hotel%20logo.bmp" style="z-index: 106; left: 35px; width: 114px;
position: absolute; top: 62px; height: 103px" id="IMG1"
language="javascript" onclick="return IMG1_onclick()" />
<div>
<div id="header">
<asp:LoginStatus ID="LoginStatus1" runat="server" />
<br />
<h3 style="text-align: left">
<span style="font-size:
24pt"> <span style="font-size: 16pt">
<span style="font-size: 18pt">
Hilton Hotel Restaurant
</span></span></span></h3>
<asp:HyperLink
ID="HyperLink3" runat="server" Style="z-index: 102; left: 43px;
position: absolute;
top: 229px" Font-Names="Times New Roman" Font-Size="12pt"
NavigateUrl="~/Home.aspx">Home</asp:HyperLink>
<asp:HyperLink ID="HyperLink2" runat="server" Style="z-index: 100;
left: 240px; position: absolute;
top: 231px" Font-Names="Times New Roman" Font-Size="12pt"
NavigateUrl="~/Catering.aspx">Catering</asp:HyperLink>
<br />
<asp:HyperLink
ID="HyperLink1" runat="server" Style="z-index: 100; left: 107px;
position: absolute;
top: 232px" Font-Names="Times New Roman" Font-Size="12pt"
NavigateUrl="~/Reservation.aspx">Reservation</asp:HyperLink>
<br />
<asp:HyperLink
ID="HyperLink4" runat="server" Style="z-index: 101; left: 334px;
position: absolute;
top: 231px" Font-Names="Times New Roman" Font-Size="12pt"
NavigateUrl="~/Payment.aspx">Payment</asp:HyperLink>
<asp:HyperLink
ID="HyperLink5" runat="server" Style="z-index: 104; left: 434px;
position: absolute;
top: 232px" Font-Names="Times New Roman" Font-Size="12pt" Width="99px"
NavigateUrl="~/Contact.aspx">Contact Us</asp:HyperLink>
<br />
<div id="wrapper">
<br />
<asp:contentplaceholder id="ContentPlaceHolder1" runat="server">
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<img src="App_Themes/lanai/chicken.bmp" style="z-index: 103; left:
57px; width: 135px;
position: absolute; top: 561px; height: 104px" />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
</asp:ContentPlaceHolder>
<div id= "footer"> Copyright 2006 Hilton Hotel </div>
</div>
</form>
</body>
</html>