在我的例子中，这个错误的原因是我有两个具有相同id名称但表结构不同的表，因为我习惯复制-粘贴表代码。请确保每张桌子有不同的id。

<table id="tabel_data"> <thead> <tr> <th>heading 1</th> <th>heading 2</th> <th>heading 3</th> <th>heading 4</th> <th>heading 5</th> </tr> </thead> <tbody> <tr> <td>data-1</td> <td>data-2</td> <td>data-3</td> <td>data-4</td> <td>data-5</td> </tr> </tbody> </table> <table id="tabel_data"> <thead> <tr> <th>heading 1</th> <th>heading 2</th> <th>heading 3</th> </tr> </thead> <tbody> <tr> <td>data-1</td> <td>data-2</td> <td>data-3</td> </tr> </tbody> </table>

对于列标题，您需要将行包装为<thead>，对于行包装为<tbody>。还要确保您有匹配的编号。列标题<th>，就像对td

我在通过脚手架生成器创建的Rails视图中使用DOM数据时遇到了同样的问题。默认情况下，视图为最后三列(包含显示、隐藏和销毁记录的链接)省略<th>元素。我发现，如果我在<thead>内的<th>元素中为这些列添加标题，它就解决了这个问题。

I can't say if this is the same problem you're having since I can't see your html. If it is not the same problem, you can use the chrome debugger to figure out which column it is erroring out on by clicking on the error in the console (which will take you to the code it is failing on), then adding a conditional breakpoint (at col==undefined). When it stops you can check the variable i to see which column it is currently on which can help you figure out what is different about that column from the others. Hope that helps!

对我来说，这个问题与上面给出的答案略有不同。对我来说，HTML标记很好，但是javascript中的一列缺失了，并且与HTML不匹配。

i.e.

<table id="companies-index-table" class="table table-responsive-sm table-striped">

                            <thead>
                            <tr>
                                <th>Id</th>
                                <th>Name</th>
                                <th>Created at</th>
                                <th>Updated at</th>
                                <th>Count</th>
                            </tr>
                            </thead>
                            <tbody>
                            @foreach($companies as $company)
                                <tr>
                                    <td>{{ $company->id }}</td>
                                    <td>{{ $company->name }}</td>
                                    <td>{{ $company->created_at }}</td>
                                    <td>{{ $company->updated_at }}</td>
                                    <td>{{ $company->count }}</td>
                                </tr>
                            @endforeach
                            </tbody>
                        </table>

我的脚本:

<script>
        $(document).ready(function() {
            $('#companies-index-table').DataTable({
                serverSide: true,
                processing: true,
                responsive: true,
                    ajax: "{{ route('admincompanies.datatables') }}",
                columns: [
                    { name: 'id' },
                    { name: 'name' },
                    { name: 'created_at' },
                    { name: 'updated_at' },     <-- I was missing this line so my columns didn't match the thead section.
                    { name: 'count', orderable: false },
                ],
            });
        });
    </script>

如何在。net MVC视图中成功地渲染一个数据表，这个问题让我抓狂。这工作:

 **@model List<Student>
 @{
    ViewData["Title"] = "Index";
}
 <h2>NEW VIEW Index</h2>
 <table id="example" class="display" style="width:100%">
   <thead>
   <tr>
   <th>ID</th>
    <th>Firstname</th>
    <th>Lastname</th> 
  </tr>
  </thead>
  <tbody>
@foreach (var element in Model)
{
    <tr>
    <td>@Html.DisplayFor(m => element.ID)</td>
    <td>@Html.DisplayFor(m => element.FirstName)</td>
    <td>@Html.DisplayFor(m => element.LastName)</td>
    </tr>

}
</tbody>
</table>**

JS文件中的脚本:

**$(document).ready(function () {
    $('#example').DataTable();
});**

发生这种情况的另一个原因是DataTable初始化中的columns参数。

列的数量必须与标题相匹配

"columns" : [ {
                "width" : "30%"
            }, {
                "width" : "15%"
            }, {
                "width" : "15%"
            }, {
                "width" : "30%"
            } ]

我有7列

<th>Full Name</th>
<th>Phone Number</th>
<th>Vehicle</th>
<th>Home Location</th>
<th>Tags</th>
<th>Current Location</th>
<th>Serving Route</th>