title: Populating a Kendo UI Combobox with big JSON string
body: <p>I have a MVC3 ASP.NET Project in which I am using jQuery and KendoUI for the view. I have defined the combobox, a dataSource for it and I am getting results from the controller with the JSON string in correct format within the dataSource.</p>
  
  <p>The data returned as JSON string is about 500kb and the combobox is not showing anything. It just shows the loading icon in the right side of it. I think the large amount of data really is a problem here...</p>
  
  <p>Can anyone help?</p>
  
  <p>Bellow is a snippet of my code:</p>
  
  <p><code>&lt;input id="kendoCboClienti" /&gt;</code></p>
  
  <pre><code>&lt;script type="text/javascript"&gt;
      $(document).ready(function () {
          clientiDS = new kendo.data.DataSource({
              transport: {
                  read: {
                      url: "/Clienti/",
                      dataType: "json"
                  }
              },
              schema: {
                  model: {
                      fields: {
                          id: { type: "string" },
                          ragioneSociale: { type: "string" }
                      }
                  }
              }
          });
  
          $("#kendoCboClienti").kendoComboBox({
              placeholder: "Sceglie il cliente",
              dataTextField: "RAGIONE_SOCIALE",
              dataValueField: "ID",
              dataSource: clientiDS
          });
      });
  &lt;/script&gt;
  </code></pre>
  
  <p>And the JSON string look similar to this:</p>
  
  <pre><code>[  
      {ID:429,RAGIONE_SOCIALE:"AUTOTRASP.PORETTO G."},
      {ID:430,RAGIONE_SOCIALE:"P.G. JOHNNY IMPORT EXPORT"},
      {ID:431,RAGIONE_SOCIALE:"CONFARTIGIANATO TREVISO"},
      .....    
  ]
  </code></pre>
  
  <p>In jsFiddle works, but it is very very slow, unresponsive and the browser crashes sometimes for that amount of data.</p>
  
  <p>Thanks!</p>
  
  <p><strong>Edit 1:</strong> I've modified the amount of data sent to the dataSource (only 10 records) and still doesn't work. Maybe it's a problem with the dataSource?</p>