title: how do i get a w2ui grid cell value?
body: <p>i want to get my "id" value of w2ui grid. The record came from a database</p>
  
  <blockquote>
    <p>columns: [<br>
                { field: 'id', caption: 'ID', size: '50px' },
                { field: 'name', caption: 'Name', size: '300px'},]</p>
  </blockquote>
  
  <p>my function           </p>
  
  <pre><code>onDblClick: function (event) {
  
             var grid = this;
             event.onComplete = function () {
             var sel = grid.getSelection();
             console.log('my id value ' + sel.id);
        }
  </code></pre>
  
  <p>but nothing appear. i do it wrong?</p>