title: DataRow: Check for empty (Not "null) fields in DataSet
body: <p>Hopefully this is an easy one.  Is there a way to test for an "empty" field using DataRow?  The following work fine for testing against a field with null values, unfortunately, the column I'm dealing with are either populated with data or are just "empty".  Is there an approach in C# I'm missing?  Thanks</p>
  
  <pre><code>if (Particle.Tables.Count == 0 || pDr.ItemArray[1].ToString() == "")
  tblParticle.Append("No Data");
  </code></pre>