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Archive for February, 2011

Refreshing data in jQuery DataTables

February 18th, 2011 18 comments

Allan Jardine’s DataTables is a very powerful and slick jQuery plugin for displaying tabular data. It has many features and can do most of what you might want. One thing that’s curiously difficult though, is how to refresh the contents in a simple way, so I for my own reference, and possibly for the benefit of others as well, here’s a complete example of one way if doing this:

<table id="HelpdeskOverview">
  <thead>
    <tr>
      <th>Ärende</th>
      <th>Rapporterad</th>
      <th>Syst/Utr/Appl</th>
      <th>Prio</th>
      <th>Rubrik</th>
      <th>Status</th>
      <th>Ägare</th>
    </tr>
  </thead>
  <tbody> 
  </tbody> 
</table>
function InitOverviewDataTable()
{
  oOverviewTable =$('#HelpdeskOverview').dataTable(
  {
    "bPaginate": true,
    "bJQueryUI": true,  // ThemeRoller-stöd
    "bLengthChange": false,
    "bFilter": false,
    "bSort": false,
    "bInfo": true,
    "bAutoWidth": true,
    "bProcessing": true,
    "iDisplayLength": 10,
    "sAjaxSource": '/Helpdesk/ActiveCases/noacceptancetest'
  });
}

function RefreshTable(tableId, urlData)
{
  $.getJSON(urlData, null, function( json )
  {
    table = $(tableId).dataTable();
    oSettings = table.fnSettings();
    
    table.fnClearTable(this);

    for (var i=0; i<json.aaData.length; i++)
    {
      table.oApi._fnAddData(oSettings, json.aaData[i]);
    }

    oSettings.aiDisplay = oSettings.aiDisplayMaster.slice();
    table.fnDraw();
  });
}

function AutoReload()
{
  RefreshTable('#HelpdeskOverview', '/Helpdesk/ActiveCases/noacceptancetest');
 
  setTimeout(function(){AutoReload();}, 30000);
}

$(document).ready(function () {
  InitOverviewDataTable();
  setTimeout(function(){AutoReload();}, 30000);
});

The key is of course the RefreshTable function.

/Emil

Categories: Web Tags: , ,

Property promotion when debatching messages from the BizTalk WCF SQL adapter

February 6th, 2011 2 comments

Richard Seroter has a great post about how to debatch inbound messages from the WCF SQL adapter in BizTalk 2009/2010: http://seroter.wordpress.com/2010/04/08/debatching-inbound-messages-from-biztalk-wcf-sql-adapter/

The problem is that when polling a database table for new data, we get a single message containing all matching rows. In most cases you probably want to debatch this message into separate message, one for each row, and it’s actually rather easy (see Richard’s post for the details).

There seems to be one problem though, namely that property promotions in the incoming schema (which is created automatically if you’re using typed polling) doesn’t work. One solution for that is to create a separate intermediate schema with the required promotions and transform the incoming messages into that schema using the “inbound maps” setting on the receive port. Note that the map’s source schema should be the top TypedPollingResultSet0 element of the generated schema, not the one below the TypedPolling element, since the transformation is done after debatching takes place.

As an added bonus you don’t mess up your message flows with “TypedPollingResultSet0″ message types, that are rather non-descriptive. A message type name of “RaindanceNotification” (or whatever you name the intermediate schema) is much more communicative.

/Emil

Categories: BizTalk Tags:

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