title: How to refresh the dropdown list in the Kendo Grid Editor
body: <p>I'm new using Kendo UI for JQuery,</p>
  
  <p>I have a kendoGrid and I'm trying to edit the rows. I'm using a popup editor. One of the columns in the row is a dropdown list and this should be different for each row. I have written a method in my controller to actually fetch the new dropdown list based on the parameters passed. I'm not able to reload the dropdown list for each row. It is being executed only once.</p>
  
  <p>Please find the code below. </p>
  
  <pre><code>    $("#test").kendoGrid({
                          dataSource: entriesDataSource,
                          pageable: true,
                          sortable: true,
                          selectable: "single row",
                          columns: [
                              {
                                  field: "RequiredText",
                                  title: "Required Text",
                                  editor: singleSelectRequiredTextEditor
                              },
                                  { command: ["edit"], title: "&amp;nbsp;" },
                          ],
                          editable: "popup"
                      });
                  };
  
  
      var singleSelectRequiredTextEditor = function (container, options) {
                      $('&lt;input data-bind="value:' + options.field + '"/&gt;')
                          .appendTo(container)
                          .kendoDropDownList({
                              suggest: true,
                              dataSource: getRequiredTextList,
                          });
                  };
  
      var getRequiredTextList = new kendo.data.DataSource({
          transport: {
              read: {
                  url: $.getActionUrl('GetRequiredTextList'),
                  dataType: "json",
                  data: function () {
                      return {
                          param1: sname,
                          param2: rname
                      };
                  }
              }
          }
      });
  </code></pre>
  
  <p>Any help would be appreciated. Thanks.</p>