title: Add a row in Dojo datagrid
body: <p>Struggling to find a bit of code to easily understand.</p>
  
  <p>How do you add a row and clear all rows in a Dojo datagrid (version 1.4.2).  Lets say the data is 2 columns with customerID and address.</p>
  
  <p>I am using </p>
  
  <pre><code>dojo.data.ItemFileWriteStore
  </code></pre>
  
  <p>to store values in - but again not quite sure how this should be used.</p>
  
  <p>It can't be that hard.</p>
  
  <p>Cheers.</p>