button to show current sort order

[Steve LaForge]

I have a grid with multicolumn sorting enabled.  The user needs to be able to see what the currently selected sort order is.  I've created a button and attached the following javascript to execute via the onclientclick event.

It identifies the grid and the mastertableview with no trouble, but nothing is returned by the get_sortExpressions(), so the resulting message is empty.

What am I missing?

Thanks!

    function showSortOrder() {
      var grid = $find("<%=gridResults.ClientID %>")
      alert("Grid = " + grid);
      var mstrvw = grid.get_masterTableView();
      alert("mstrvw = " + mstrvw);
      var sortExpressions = grid.get_masterTableView().get_sortExpressions();
      alert("sortExpressions = " + sortExpressions);
      // alert("sortExpressions length = " + sortExpressions.length);

      var msg = "The current sort order is\n";
//      for (i = 0; i < sortExpressions.length; i++)
//        {
//          var expression = sortExpressions[i];
//          var fieldName = expression.get_fieldName();
//          var sortOrder = expression.get_sortOrder();
//          msg = msg + fieldName + " (" + sortOrder + ")\n"
//        }
      //      alert(msg);
      alert(msg + sortExpressions.toString());
    }

[Tsvetina]

Hello Steve,

The get_sortExpressions() method along with get_filterExpressions() are meaningful only when you use client-side binding for your RadGrid control. Otherwise, as sorting is done on the server, the sort expressions are not kept on the client. In this case you can take the sort expressions and sort order server-side and depending on your needs you can for example keep them in asp HiddenField controls in order to show them on the client.

Sincerely yours,
Tsvetina
the Telerik team

[Steve LaForge]

Thanks!  Your suggestion definitely led me down the right path.