title: Gridview RowCommand does not fire on second time
body: <p>i have a gridview and a simple linkbutton with rowcommand like below:</p>
  
  <pre><code>    &lt;ItemTemplate&gt;
           &lt;asp:LinkButton runat="server" ID="lnbTest" CommandName="Download" 
  CommandArgument='&lt;%#Eval("UPLOADID") %&gt;' Text="Download"&gt;&lt;/asp:LinkButton&gt;
      &lt;/ItemTemplate&gt;
  </code></pre>
  
  <p>This linkbutton is for downloading file. I get the UPLOADID and write with Response.WriteFile() method. </p>
  
  <p>THE PROBLEM is when i click on the linkbutton first time, file is downloading but isnt downloading on the second time. Linkbutton does not fire anything. I have searched a lot but couldnt any workaround. It is said it would be related with validation. I have some custom and required validators on my page.</p>
  
  <p>Could anyone suggest me a solution? Thanks in advance.</p>