title: add a third party controllers to aspx
body: <p>I want to add a third party controllers to my aspx.</p>
  
  <p>I download it and install it. then i compied the dll files to my bin and i added theses dll to my reference. I can see the controllers in my aspx page but i am not able to use them im my c# code .</p>
  
  <h3>i am sure i have done something wrong in my web.config</h3>
  
  <p>This is all my web.config</p>
  
  <pre><code>&lt;?xml version="1.0"?&gt;
  
  &lt;!--
    For more information on how to configure your ASP.NET application, please visit
    http://go.microsoft.com/fwlink/?LinkId=169433
    --&gt;
  
  &lt;configuration&gt;
      &lt;system.web&gt;
        &lt;compilation debug="true" targetFramework="4.5" /&gt;
        &lt;httpRuntime targetFramework="4.5" /&gt;
        &lt;pages&gt;
          &lt;controls&gt;
               &lt;add tagPrefix="ew"  namespace="eWorld.UI.Compatibility" assembly="eWorld.UI.Compatibility"/&gt;
          &lt;/controls&gt;
        &lt;/pages&gt;
  
      &lt;/system.web&gt;
  &lt;/configuration&gt;
  </code></pre>
  
  <h3>this is my aspx page</h3>
  
  <pre><code>&lt;ew:calendarpopup ID="CldrSchCallBack" runat="server" Text="Date" Nullable="true" Width="75px" ButtonStyle-ForeColor="#640064"
      ButtonStyle-BorderColor="#640064" ButtonStyle-BorderStyle="Solid" ButtonStyle-BorderWidth="1"/&gt;&amp;nbsp;  
      &lt;ew:timepicker ID="TimePicker1" runat="server" Text="Time" Nullable="true" Width="75px" ButtonStyle-ForeColor="#640064" 
      ButtonStyle-BorderColor="#640064" ButtonStyle-BorderStyle="Solid" ButtonStyle-BorderWidth="1"/&gt;
  </code></pre>
  
  <h3>my problem</h3>
  
  <p>I can't use this in my code</p>
  
  <pre><code>CldrSchCallBack.SelectedValue.HasValue 
  TimePicker1.SelectedValue.HasValue
  </code></pre>
  
  <p>because I got this error:</p>
  
  <pre><code>Error   1   The name 'CldrSchCallBack' does not exist in the current context    C:\Users\User\documents\visual studio 2012\Projects\TestC1\TestC1\CallInfo.aspx.cs  537 120 TestC1
  Error   2   The name 'TimePicker1' does not exist in the current context    C:\Users\User\documents\visual studio 2012\Projects\TestC1\TestC1\CallInfo.aspx.cs  537 162 TestC1
  </code></pre>