title: data source does not support server-side data paging
body: <p>i am currently trying to do paging for my gridview but once i allow paging in my gridview it will give me this error : The data source does not support server-side data paging. </p>
  
  <p>this is my code for gridview :</p>
  
  <pre><code>        SqlDataReader reader = cmd.ExecuteReader();
          GridView1.DataSource = reader;
          GridView1.DataSourceID = null;
          GridView1.Visible = true;
          GridView1.AllowPaging= true;
          GridView1.DataBind(); 
          conn.Close();
  </code></pre>