title: ASP.NET 3.5 :No Postback triggered for button click
body: <p>I have an ASP.NET page developed in VS 2008. there is a text box and login button.Required fireld validator and Validtion Group controls are associate for validation.I wrote code for the Button click evenet handler too.But the Button click is not getting fired.There is no post back happening. Can any one tell me why ?</p>
  
  <p>HTM lmarkup</p>
  
  <pre><code> &lt;asp:TextBox ID="txtLoginPass" runat="server"&gt;&lt;/asp:TextBox&gt;
          &lt;asp:RequiredFieldValidator ID="RequiredFieldValidator2" ControlToValidate="txtPassword" ValidationGroup="Login" ErrorMessage="Please enter password." runat="server" /&gt;
  
  
    &lt;asp:Button ID="btnLogin" runat="server" Text="Login"
                onclick="btnLogin_Click" ValidationGroup="Login" /&gt;
  </code></pre>