title: Gridview ASP.NET is not shown when loading webpage
body: <p>well I'm so new to ASP.NET I've been working on this project for about two weeks now, but I can't get a GridView with an objectdatasource to show when webpage loads, I can see all columns in design time.
  The method returns a List and in design time I can see all columns with the right column name but when loading the service and the webpage afterwards nothing shows up. Any help will be appreciated. Regards to all readers.
  The method receives a string value I've set a default to 'q'.</p>
  
  <pre><code>&lt;asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False" 
          DataSourceID="ObjectDataSource1"&gt;
          &lt;Columns&gt;
              &lt;asp:BoundField DataField="Contraseña" HeaderText="Contraseña" 
                  SortExpression="Contraseña" /&gt;
              &lt;asp:BoundField DataField="Id_User" HeaderText="Id_User" 
                  SortExpression="Id_User" /&gt;
              &lt;asp:BoundField DataField="Nombre" HeaderText="Nombre" 
                  SortExpression="Nombre" /&gt;
              &lt;asp:BoundField DataField="Tipo" HeaderText="Tipo" SortExpression="Tipo" /&gt;
              &lt;asp:BoundField DataField="Usuario" HeaderText="Usuario" 
                  SortExpression="Usuario" /&gt;
          &lt;/Columns&gt;
      &lt;/asp:GridView&gt;
  </code></pre>