Answers

• rf1234 Posts: 2,991Questions: 87Answers: 421

  September 9 edited September 9

  var selectedRows = excludeTable.rows({ selected: true }).data().toArray(); // here i am getting "undefined"

  The reason is probably that your Data Table doesn't exist because it wasn't initialized correctly. You may also have not installed the "select" extension.

  Here is something similar from my own code that works like a charm:

  action: function ( e, dt, button, config ) {
   var selected = dt.rows( {selected: true} ).data().toArray();
   var contractIdArray = selected.map(function(a){return a.contract.id;});
   ....
  

  https://datatables.net/extensions/select/

  Another reason might be that you attach the event handler to '#btnRight' prior to finalizing data table initialization. If '#btnRight' is a data tables button (see buttons extension) it won't exist before initialization will be finished.
• kthorngren Posts: 21,336Questions: 26Answers: 4,953

  September 9 edited September 9

  var excludeTable = LoadTableExclude();

  What is returned from the LoadTableExclude()? Looks it is expected to be the Datatable API but the error indicates otherwise.

  If you still need help please post a test case replicating the error so we can understand your code flow to help debug.
  https://datatables.net/manual/tech-notes/10#How-to-provide-a-test-case

  Kevin
• chandhu Posts: 19Questions: 6Answers: 0

  September 10

  Hi @rf1234 Could you please clearly specify the answer more clearly. I didnt understand it. Please.
• allan Posts: 63,510Questions: 1Answers: 10,471 Site admin

  September 10

  If you could answer Kevin's question we will hopefully be able to provide further assistance.

  Please provide a link to a test case as required in the forum rules.

  Allan
• chandhu Posts: 19Questions: 6Answers: 0

  September 10

  Hi @Kevin Here is the LoadTableExclude code in cshtml

  function LoadTableExclude() {
  return $('#excludeTable').DataTable({
  ordering: true,
  paging: false,
  searching: false,
  serverSide: true,
  filter: true,
  ajax: {
  url: '/DOOR_MANAGEMENT/LoadExclude',
  type: 'GET',
  datatype: 'json'
  },
  columns: [
  { data: 'siteCode', title: 'Site Code', autoWidth: true, searchable: true },
  { data: 'legacyDoor', title: 'Legacy Door', autoWidth: true },
  { data: 'siteType', title: 'Site Type', autoWidth: true },
  { data: 'siteCountry', title: 'Site Country', autoWidth: true },
  { data: 'buyingGroup', title: 'Buying Group', autoWidth: false, orderable: false },
  { data: 'settingName', title: 'Setting Name', autoWidth: true }
  ],
  select: {
  style: 'multi'
  },
  paging: false
  });
  }
• kthorngren Posts: 21,336Questions: 26Answers: 4,953

  September 10 edited September 10

  Your code snippets work in this test case.
  https://live.datatables.net/yaroyala/45/edit

  As Allan mentioned we will need to see the problem to help debug. Please post a link to your page or test case replicating the issue. Fell free to update my test case.
  https://datatables.net/manual/tech-notes/10#How-to-provide-a-test-case

  Kevin
• chandhu Posts: 19Questions: 6Answers: 0

  September 10

  Hi @Kevin I am working on ASP.Net Core MVC C# app. The live example that you shared above is PHP. I think so. And it is working as well. But in my case it is not working. I am not able to get the correct selected rows on a button click.
• kthorngren Posts: 21,336Questions: 26Answers: 4,953

  September 10 Answer ✓

  var selectedRows = excludeTable.rows({ selected: true }).data().toArray(); // here i am getting "undefined"

  This is the client side issue. It has nothing to do with the server environment nor the fact that the data is fetched via ajax. The error is likely due to your client side code structure and flow.

  The first step is to use the browser's debugger, with a breakpoint on that statement, to determine what is undefined. You didn't post the error message which would provide more details for us. My guess is excludeTable is undefined because var excludeTable = LoadTableExclude(); is not defined in a scope that var selectedRows = excludeTable.rows({ selected: true }).data().toArray(); has access to. But that is just a guess

  For us to help debug we will need to see a page that shows the error. This way we can trace through to see where the undefined is coming from.

  Possibly you can do something as simple as getting the API instance inside the click event, like this:

  $('#btnRight').click(function () {
                  var excludeTable = $('#excludeTable').DataTable();
                  var selectedRows = excludeTable.rows({ selected: true }).data().toArray(); // here i am getting "undefined"
                  var ids = selectedRows.map(row => row.siteCode); // siteCode is the id value of the data object
                   
                  if (ids.length === 0) {
                      alert("Please select rows to move.");
                      return;
                  }
  }); // I always get "Please select row to move" message.
  

  Kevin
• chandhu Posts: 19Questions: 6Answers: 0

  September 10

  Hi @Kevin. Really you are amazing. Thanks. It worked.