title: use DataView when popuate a Gridview via SQLDataSource
body: <p>I' workingon an ASP.NET project and in order to populate a GridView with datat from a SQL Server Database' table I use SQLDataSource and everythings goes just fine.</p>
  
  <p>But now I need to add the option to sort the columns of the gridview(ASC-Desc), for that purpose I want to use a DataView and got the next code</p>
  
  <pre><code>DataView dv = new DataView();
   dv = (DataView)Ejemplo.Select(DataSourceSelectArguments.Empty);
   dv.Sort = "Departmento Desc";
   GridView1.DataSource = dv;
  </code></pre>
  
  <p>but got this error message:</p>
  
  <pre><code>Both DataSource and DataSourceID are defined on 'GridView1'.  Remove one definition.
  </code></pre>
  
  <p>Could you please help me and tell what am I doing wrong?</p>