如何使用 MVC 中的 ajax 使用从服务器新获取的数据重新初始化数据表 [英] How to reinitialize dataTables with newly fetched data from server using ajax in MVC

问题描述

所以这里我有管理员菜单列表，在它们下面我有上传新闻.当这个特定的菜单被点击时，我会调用一个局部视图，如下所示.

So here I have list of menus for admin and under them I have Upload news. When this particular menu is clicked, 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
          });
}

我在 AdminController 中的 PartialViewResult 如下:

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);
}

我的_UploadNews.cshtml如下

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="[e-mail]">
                   <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="[e-mail]"><span class="fa fa-edit"></span> </button>&nbsp; <button class="btn btn-danger" onclick="javascript: DeleteNews(this);" data-info="[e-mail]"><span class="fa fa-trash-o"></span></button></td>
               </tr>
          }
     </tbody>
</table>

所以到现在为止都很好.一切进展顺利，表格只显示未来几天的新闻.现在我可以选择让管理员从表中获取整套新闻，包括过去几天.所以我在我的局部视图中保留了一个复选框，如下所示，这是一个引导开关类型:

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">

并且我为该特定复选框编写了一个 onswitchchange，如下所示:

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');
     }
});

和我的 fetchNews 函数如下:

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

当这个函数被调用时，我收到一个提示

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

DataTables 警告:table id=dailyNews - 无法重新初始化数据表.有关此错误的更多信息，请参阅http://datatables.net/tn/3

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

我访问了上述链接，但无法理解任何内容.任何人都可以让我知道，如何调用控制器 json 方法并将新闻列表呈现到此表中?

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

推荐答案

错误信息 http://datatables.net/tn/3 准确地说明了问题.您正在使用 fetchNews() 中的不同选项重新初始化表.

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

需要先销毁表，见http://datatables.net/manual/tech-notes/3#destroy.你可以用 $("#dailyNews").dataTable().fnDestroy() (DataTables 1.9.x) 或 $("#dailyNews").DataTable().destroy()(数据表 1.10.x).

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 ...
        });
    }
}

或者，如果您使用的是 DataTables 1.10.x，您可以使用附加选项 "destroy": true 初始化新表，见下文.

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 ...
        });
    }
}

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