title: Kendo datasource read undefined after adding record in ds
body: <p>I got stuck in a problem with kendo datasource.
  I created the datasource array , because i have multiple grid to bind . The way i access the datasource is </p>
  
  <pre><code>ds[1] . ds[0],
  </code></pre>
  
  <p>When i execute <code>ds[1].read();</code> it works fine and get the data from server.</p>
  
  <p>As soon as i add a record into <code>ds[1].add( json data)</code> and try to read the datasource it give error <code>undefined</code>;</p>
  
  <pre><code>     dsSupplier[ActivetabRank].read();
  $.each(tempArray.OrderDetailModel, function (key, value) {
  dsSupplier[ActivetabRank].add({
  "ParkOrderId": 0,
  "itemDesc": value.ItemDesc,
  "itemQty": 0,
  "Supplier": {
  "SupplierID": tempArray.SupplierModel.SupplierID,
  tempArray.SupplierModel.EFax, "IsActive": true,
  },
  });
  });
  
  }); 
  </code></pre>