title: DataFormatString for Boolean column
body: <p>I have a gridview with dynamic datasource.</p>
  
  <p>I add column in codebehind .</p>
  
  <pre><code>BoundField col=new BundField(); 
  col.DataField="Active";
  col.DataFormatString=//DataFormatString;
  gridview1.Columns.Add(col);
  </code></pre>
  
  <p>How do set yes/no for boolean column ?</p>