asp.net: Invalid postback or callback argument
I am getting this error:
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 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) +8627417
System.Web.UI.WebControls.ListBox.LoadPostData(String postDataKey, NameValueCollection postCollection) +360
System.Web.UI.WebControls.ListBox.System.Web.UI.IPostBackDataHandler.LoadPostData(String postDataKey, NameValueCollection postCollection) +13
System.Web.UI.Page.ProcessPostData(NameValueCollection postData, Boolean fBeforeLoad) +346
System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +1743
Version Information: Microsoft .NET Framework Version:2.0.50727.3623; ASP.NET Version:2.0.50727.3618
What does it mean?
Here is my code:
<%@ Page EnableEventValidation="true" Language="C#" AutoEventWireup="true" CodeBehind="WebForm1.aspx.cs" Inherits="EnterData.DataEntry.WebForm1" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
<title></title>
<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.6.4/jquery.min.js" type="text/javascript"></script>
<script src="https://ajax.googleapis.com/ajax/libs/jqueryui/1.8.16/jquery-ui.js" type="text/javascript"></script>
<link href="../niceforms/niceforms-default.css" rel="stylesheet" type="text/css" />
<script src="../niceforms/niceforms.js" type="text/javascript"></script>
<link href="../jquery-ui-1.8.16.custom.css" rel="stylesheet" type="text/css" />
<style type="text/css">
.list-problems {
height:600px !important;
width:200px !important;
display:inline-block;
}
</style>
<script>
jQuery(function($) {
//$("#occurrence_dateTextBox").mask("99/99/9999");
//$("#<%= report_dateTextBox.ClientID %>").mask("99/99/9999");
$("#<%= occurrence_dateTextBox.ClientID %>").datepicker();
$("#<%= report_dateTextBox.ClientID %>").datepicker();
//$(".datepicker").datepicker();
});
$(function() {
$.get('../file.txt', function(data) {
var output = data.split('\n'),
tmp = '';
for (i = 0; i < output.length; i++) {
tmp += '<option value=' + output[i] + '>' + output[i] + '</option>';
}
$('#lstProblems').html(tmp);
});
});
$(function() {
$("select").multiselect();
});
function getselectedproblems() {
var selectedLanguages = new Array();
jQuery('#lstProblems option:selected').each(function() {
selectedLanguages.push(jQuery(this).val());
});
}
</script>
</head>
<body><div id="container">
<form id="form1" runat="server" class="niceform">
<fieldset>
<legend>Section A</legend>
<dl>
<dt><label for="occurrence_dateTextBox" >Occurrence Date:</label></dt>
<dd><asp:TextBox ID="occurrence_dateTextBox" runat="server" size="50"/></dd>
</dl>
<dl>
<dt><label for="report_dateTextBox">Report Date:</label></dt>
<dd><asp:TextBox ID="report_dateTextBox" runat="server" size="50"/></dd>
</dl>
<dl>
<dt><label for="spec_idTextBox">Specimen ID:</label></dt>
<dd><asp:TextBox ID="spec_idTextBox" runat="server" size="50"/></dd>
</dl>
<dl>
<dt><label for="batch_idTextBox">Batch ID:</label></dt>
<dd><asp:TextBox ID="batch_idTextBox" runat="server" size="50"/></dd>
</dl>
<dl>
<dt><label for="report_byTextBox">Report By:</label></dt>
<dd><asp:TextBox ID="report_byTextBox" runat="server" size="50"/></dd>
</dl>
<dl>
<dt><label for="identified_byTextBox">Identified ID:</label></dt>
<dd><asp:TextBox ID="identified_byTextBox" runat="server" size="50"/></dd>
</dl>
</fieldset>
<fieldset>
<legend>Section B</legend>
<dl>
<dt><label for="problemTextBox">Problem:</label></dt>
<dd><asp:TextBox ID="problemTextBox" runat="server" size="50"/></dd>
</dl>
<dl>
<dt><label for="lstProblems">Problems List:</label></dt>
<dd>
<asp:ListBox ID="lstProblems" runat="server" SelectionMode="Multiple" CssClass="list-problems"></asp:ListBox>
</dd>
</dl>
<dl>
<dd><select size="8" multiple="true" >
<optgroup label="Europe">
<option>United Kingdom</option>
<option>Luxembourg</option>
</optgroup>
<optgroup label="Asia">
<option>India</option>
<option>Dubai</option>
</optgroup>
</select> </dd>
</dl>
<dl>
<asp:ListBox ID="ListBox1" runat="server" DataSourceID="SqlDataSource1"
DataTextField="batch" DataValueField="batch" SelectionMode="Multiple"
Height="100px" Width="329px"></asp:ListBox>
<asp:SqlDataSource ID="SqlDataSource1" runat="server"
ConnectionString="<%$ ConnectionStrings:LOM %>"
SelectCommand="SELECT [batch] FROM [lom_batch]"></asp:SqlDataSource>
</dl>
</fieldset>
<fieldset>
<legend>Section C</legend>
<dl>
<dt><label for="section_c_issue_error_identified_byTextBox">Issue/Error Identified By:</label></dt>
<dd><asp:TextBox ID="section_c_issue_error_identified_byTextBox" runat="server" size="50"/></dd>
</dl>
<dl>
<dt><label for="section_c_commentsTextBox">Comments:</label></dt>
<dd><asp:TextBox ID="section_c_commentsTextBox" runat="server" size="50"/></dd>
</dl>
</fieldset>
<fieldset>
<legend>Section D</legend>
<dl>
<dt><label for="section_d_investigationTextBox">Investigation:</label></dt>
<dd><asp:TextBox ID="section_d_investigationTextBox" runat="server" size="50"/></dd>
</dl>
</fieldset>
<fieldset>
<legend>Section E</legend>
<dl>
<dt><label for="section_e_corrective_actionTextBox">Corrective Action:</label></dt>
<dd><asp:TextBox ID="section_e_corrective_actionTextBox" runat="server" height="200" TextMode="MultiLine" size="50"/></dd>
</dl>
</fieldset>
<fieldset>
<legend>Section F</legend>
<dl>
<dt><label for="section_f_commentsTextBox">Comments:</label></dt>
<dd><asp:TextBox ID="section_f_commentsTextBox" runat="server" size="50"/></dd>
</dl>
</fieldset>
<fieldset>
<legend>Pre-Analytical</legend>
<dl>
<dt><label for="prePracticeCodeTextBox">Practice Code:</label></dt>
<dd><asp:TextBox ID="prePracticeCodeTextBox" runat="server" Visible="false"/></dd>
</dl>
<dl>
<dt><label for="preContactTextBox1">Contact:</label></dt>
<dd><asp:TextBox ID="preContactTextBox" runat="server" Visible="false"/></dd>
</dl>
<dl>
<dt><label for="CheckBox1">PreAnalytical?</label></dt>
<dd> <asp:CheckBox ID="CheckBox1" runat="server" CausesValidation="false"
Visible="true" AutoPostBack="true" OnCheckChanged="CheckBox1_CheckedChanged"/></dd>
</dl>
</fieldset>
<asp:Button ID="Button1" runat="server" Text="Button" OnClick="SubmitData" OnClientClick="JSfunction()"/>
</form>
</div></body>
</html>
What am I doing wrong?
I am getting this error after I press the submit button.
Solution 1:
in you aspx file you should put the first line as this :
<%@ Page EnableEventValidation="false" %>
if you already have something like <%@ Page so just add the rest => EnableEventValidation="false" %>
I recommend not to do it.
Solution 2:
If you look at the first lines of text you can glean what your error is.
this feature verifies that arguments to postback or callback events originate from the server control that originally rendered them
You're dynamically editing the lstProblems dropdown, so when you post back ASP.NET says "Warning! Invalid entries in the dropdown!" and freaks out throwing that error. You have to determine if turning off event validation is an OK solution, but I would research it before doing it, since the idea behind it is to make your site more secure for free.
Here's another stackoverflow answer that does a much better job explaining what to do than me: Invalid postback or callback argument. Event validation is enabled using '<pages enableEventValidation="true"/>'