Guruprasad Rao Guruprasad Rao - 1 month ago 14
jQuery Question

How to reinitialize dataTables with newly fetched data from server using ajax in MVC

So here I have list of menus for admin and under them I have Upload news. When this particular menu is click I call a partial view as below.

$("#body_data").load("/Admin/GetDailyNews", function () {
$("#dailyNews").dataTable({
"lengthMenu": [[5, 10, 25, 50, -1], [5, 10, 25, 50, "All"]],
"columnDefs": [{ "targets": 3, "orderable": false }],
"pagingType": "full_numbers",
"oLanguage": { "sSearch": "" },
"deferRender": true
});
}


My PartialViewResult in AdminController is as below:

[HttpGet]
public PartialViewResult GetDailyNews()
{
var context=new MyContext();
List<AVmodel.NewsEventsViewModel> model = new List<AVmodel.NewsEventsViewModel>();
List<news> news = (from n in context.news where n.stdate >= System.DateTime.Now orderby n.stdate descending select n).ToList();
foreach (var NEWS in news)
{
model.Add(new AVmodel.NewsEventsViewModel()
{
EDate = NEWS.stdate,
EDesc = NEWS.brief,
EName = Convert.ToString(NEWS.name),
NID = NEWS.nid
});
}
return PartialView("_UploadNews", model);
}


My _UploadNews.cshtml is as below

@model IEnumerable<MCB.Models.BusinessObjects.AVmodel.NewsEventsViewModel>
<table id="dailyNews" cellspacing="0" width="100%" class="table table-condensed table-hover table-responsive table-bordered order-column">
<thead>
<tr>
<th>Event Date</th>
<th>Event Name</th>
<th>Detailed News</th>
<th class="disabled">Actions</th>
</tr>
</thead>
<tbody>
@foreach (var news in Model)
{
<tr data-row="row_@news.NID">
<td>@news.EDate.Date.ToShortDateString()</td>
<td>@Convert.ToString(news.EName)</td>
<td>@Convert.ToString(news.EDesc)</td>
<td><button class="btn btn-primary" data-target="#editAddNews" data-toggle="modal" onclick="javascript: EditNews(this);" data-info="data_@news.NID"><span class="fa fa-edit"></span> </button>&nbsp; <button class="btn btn-danger" onclick="javascript: DeleteNews(this);" data-info="data_@news.NID"><span class="fa fa-trash-o"></span></button></td>
</tr>
}
</tbody>
</table>


So till now it's good. Everything is going well and the table displays only those news which are of future days. Now I have a option for admin to fetch the whole set of news from table, including past days. So I have kept a checkbox in my partialview as below which is a bootstrap switch type:

<input type="checkbox" name="fetchNews-checkbox" data-on-text="All News" data-off-text="Upcoming News" data-on-color="primary" data-off-color="default" data-label-width="100px" data-label-text="News details">


and I have written a
onswitchchange
for that particular checkbox as below:

$("[name='fetchNews-checkbox']").on('switchChange.bootstrapSwitch', function (event, state) {
if (state)
{
fetchNews('all');
}
else
{
fetchNews('upcoming');
}
});


and my
fetchNews
function is as below:

function fetchNews(context)
{
if(context!="")
{
$("#dailyNews").dataTable({
"sPaginationType": "full_numbers",
"bProcessing": true,
"bServerSide": true,
"sAjaxSource": "/Admin/FetchNews"
});
}
}


when this function is called I am getting an alert which says


DataTables warning: table id=dailyNews - Cannot reinitialise
DataTable. For more information about this error, please see
http://datatables.net/tn/3


I visited the above said link but was not able to understand anything. Can anyone please let me know, how call call a controller json method and render list of news into this Table?

Answer

The error message http://datatables.net/tn/3 states the problem precisely. You're re-initializing the table with different options in fetchNews().

You need to destroy the table first, see http://datatables.net/manual/tech-notes/3#destroy. You can do that with $("#dailyNews").dataTable().fnDestroy() (DataTables 1.9.x) or $("#dailyNews").DataTable().destroy() (DataTables 1.10.x).

function fetchNews(context)
{
     if(context!="")
     {
        // Destroy the table
        // Use $("#dailyNews").DataTable().destroy() for DataTables 1.10.x
        $("#dailyNews").dataTable().fnDestroy()

        $("#dailyNews").dataTable({
           // ... skipped ...
        });
    }
}

Alternatively, if you're using DataTables 1.10.x, you can initialize the new table with additional option "destroy": true, see below.

function fetchNews(context)
{
     if(context!="")
     {
        $("#dailyNews").dataTable({
            "destroy": true,
            // ... skipped ...
        });
    }
}