title: jqgrid treegrid how to reload data?
body: <p>I know how to reload normal jqgrid table. I used the same method to reload treegrid, but it doesn't work.</p>
  
  <p>The usual method to reload jqgrid:</p>
  
  <pre><code>$jqGrid.jqGrid('setGridParam',{ 
          url:path+"/admin/demo/getLogsGridJson.do", 
          postData:{'aaa':111,'bbb':222}, //
          page:1 
  }).trigger("reloadGrid");  
  </code></pre>
  
  <p>This way I can again request and refresh data.  But with treegrid it doesn't work.</p>
  
  <p>How to reload treegrid to use new postData or new url?</p>