title: Change the gridview default 1900-01-01 to null or ""
body: <p>I am using this query to insert a null value to a datetime field: </p>
  
  <pre><code>echCommand="INSERT INTO GPEC_TBL_ECHEANCE(echeance, echeance_debut, echeance_fin, objectif_id) 
  VALUES (null, " + System.DBNull.Value + "," + System.DBNull.Value + "," + newObjectifId + ")";
  
  var echCommand = new SqlCommand(insertEchQuery, con);
  </code></pre>
  
  <p>But when displaying the GridView I'm still getting the date <code>1900-01-01</code> !</p>
  
  <p>What should I add or modify to have a blank field instead of this ugly date in my Gridview  ?</p>