title: TemplateField button causing GridView Invalid Postback
body: <p>Ok, so I've got a template field in a gridview that contains just a simple button...</p>
  
  <pre><code>&lt;%@ Page Language="C#" AutoEventWireup="true" CodeFile="Administration.aspx.cs"     
  Inherits="Administration" %&gt;
  &lt;%@ Register TagPrefix="ajaxToolkit" Namespace="AjaxControlToolkit" %&gt;
  
  &lt;!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" 
  "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"&gt;
  
  &lt;html xmlns="http://www.w3.org/1999/xhtml"&gt;
  &lt;head runat="server"&gt;    
      &lt;title&gt;Keywords Administration&lt;/title&gt;
  &lt;/head&gt;
  &lt;body class="popupbody"&gt;
  &lt;form id="form1" runat="server"&gt;
      &lt;ajaxToolkit:ToolkitScriptManager ID="ToolkitScriptManager1" runat="server" EnablePartialRendering="true" CombineScripts="false"&gt;&lt;/ajaxToolkit:ToolkitScriptManager&gt;
  
      &lt;asp:Label ID="AddLabel" runat="server"&gt;Add a Keyword&lt;/asp:Label&gt;
      &lt;br /&gt;
      &lt;asp:TextBox ID="AddTextBox" runat="server" /&gt;
      &lt;asp:Button ID="AddButton" Text="Add" runat="server" OnClick="AddKeyword_Click" /&gt;
  
      &lt;asp:GridView ID="KeywordsGridView" AllowPaging="false" AutoGenerateColumns="false" BackColor="white"
          GridLines="None" HeaderStyle-CssClass="Table_Header" RowStyle-CssClass="Table_Style" 
          OnRowDataBound="RowBound" runat="server"&gt;
          &lt;Columns&gt;
              &lt;asp:TemplateField&gt;
                  &lt;ItemTemplate&gt;
                      &lt;asp:Button runat="server" /&gt;
                  &lt;/ItemTemplate&gt;
              &lt;/asp:TemplateField&gt;
              &lt;asp:BoundField DataField="References" SortExpression="References" HeaderText="Total References" /&gt;
              &lt;asp:BoundField DataField="Keyword" SortExpression="Keyword" HeaderText="Keyword" /&gt;
          &lt;/Columns&gt;
      &lt;/asp:GridView&gt;
  &lt;/form&gt;
  &lt;/body&gt;
  &lt;/html&gt;
  </code></pre>
  
  <p>Whenever I click the button I get the error...</p>
  
  <pre><code>Invalid postback or callback argument.  Event validation is enabled using 
  &lt;pages enableEventValidation="true"/&gt; in configuration or &lt;%@ Page 
  EnableEventValidation="true" %&gt; 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. 
  </code></pre>
  
  <p>I've found a decent amount of articles referencing this issue, including a couple on SO, for example...</p>
  
  <p><a href="https://stackoverflow.com/questions/228969/asp-net-invalid-postback-or-callback-argument-event-validation-is-enabled-usi">Invalid postback or callback argument.  Event validation is enabled using &#39;&lt;pages enableEventValidation=&quot;true&quot;/&gt;&#39;</a></p>
  
  <p>and...</p>
  
  <p><a href="https://stackoverflow.com/questions/103560/invalid-postback-or-callback-argument">Invalid postback or callback argument</a></p>
  
  <p>I might just be misunderstanding, but as far as I can tell they don't really help me.  How do I get this to go away without setting enableEventValidation="false"?</p>
  
  <p><b>EDIT</b> Posted all the code for my page.</p>