title: How to check if a column has no value (empty) in all rows in data table in c#
body: <p>I had pushed the excel file into my data table. The columns empty in excel were left empty in data table.  </p>
  
  <p>I guess they are not treated as null. </p>
  
  <p>Can anyone help how to check for empty rows in some column in a data table . </p>
  
  <pre><code>//successfully loaded excel into datatable
  OleDbDataReader dr= oledbCommand. ExecuteReader ();
  dataTable. Load (dr);
  </code></pre>
  
  <p>Problem- empty cells in columns remained empty in data table also.</p>
  
  <p>Doubt- Are these empty values in datatable are null??</p>
  
  <p>If not how to check whether <code>dataTable.Rows [1][1]</code> is empty or not? </p>
  
  <p>Please help!</p>