title: How to refresh Grid GWT after getting data from database_Now it keeps the Gird in the First call
body: <p>I am new with GWT_GXT</p>
  
  <p>I use MVP(model-view-Presenter)</p>
  
  <p>In Presenter, i call RPC to get data From database. After that i get a List data -> I set it for view</p>
  
  <p>In view, code is below</p>
  
  <pre><code>@Override
  public void setDeleteAllTest(List&lt;DeleteAllTestModel&gt; deleteAllTests) {
     final ListStore&lt;DeleteAllTestModel&gt; listStore = new ListStore&lt;DeleteAllTestModel&gt;();
      listStore.add(deleteAllTests);
      gridView = new PMTGridDeleteAllTest&lt;DeleteAllTestModel&gt;().getPMTGridDeleteAllTest(listStore);
      gridView.setAutoWidth(true);
  
  }
  </code></pre>
  
  <p>@Override
      protected void onRender(Element parent, int pos) {
          super.onRender(parent, pos);</p>
  
  <pre><code>    ContentPanel cp = new ContentPanel();
      cp.setBodyBorder(false);
      cp.setHeading("");
      cp.setButtonAlign(Style.HorizontalAlignment.CENTER.CENTER);
      cp.setLayout(new FitLayout());
      cp.setSize(1200, 400);
      cp.add(gridView);
  
      verticalPanel.add(cp);
  
      verticalPanel.add(nameField);
  
      verticalPanel.add(cancelButton);
  
      add(verticalPanel);
      cancelButton.addSelectionListener(new SelectionListener&lt;ButtonEvent&gt;() {
          @Override
          public void componentSelected(ButtonEvent buttonEvent) {
              PolicyDeleteAllTestDialog.this.hide();
          }
      });
  
      getButtonById("ok").hide();
  }
  </code></pre>
  
  <p>The Problem is that Gird is not refresh and update new data_ It only displays (the first Grid in the first Call) .. It always keep the first View( I use dialog to show grid)..</p>
  
  <p>Help me!</p>
  
  <p>Thanks</p>