在我的情况下，这个错误发生，如果我使用表没有标题

              <thead>
                   <tr>
                       <th>example</th>
                  </tr>
              </thead>

In my case, and using ASP.NET GridView, UpdatePanel and with DropDownList (with Chosen plugin where I reset value to zero using a Javascript line), I got this error and tried everything with no hope for days. The problem was that the code of my dropdown in code behind was as follows and when I select a value twice to apply its action to selected grid rows I get that error. I thought for days it's a Javascript issue (again, in my case) and finally the fix was giving zero for the drowpdown value with the update process:

  private void ddlTasks_SelectedIndexChanged(object sender, System.EventArgs e)
  {
     if (ddlTasks.SelectedValue != 0) {
        ChangeStatus(ddlTasks.SelectedValue);
        ddlTasks.SelectedValue = "0"; //// **This fixed my issue**
     }

     dvItemsGrid.DataSource = CreateDatasource();
     dvItemsGrid.DataBind();
     dvItemsGrid.UseAccessibleHeader = true;
     dvItemsGrid.HeaderRow.TableSection = TableRowSection.TableHeader;

  }

这是我的错:

     $('#<%= DropDownList.ClientID%>').val('0').trigger("chosen:updated").chosen();

你必须去掉colspan, th和td的个数需要匹配。

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

我遇到了同样的错误，当试图添加colspan最后th

<table>
  <thead>
    <tr>    
      <th>&nbsp;</th> <!-- column 1 -->
      <th colspan="2">&nbsp;</th> <!-- column 2&3 -->
    </tr>
  </thead>

  <tbody>
    <tr>
      <td>&nbsp;</td>
      <td>&nbsp;</td>
      <td>&nbsp;</td>
    </tr>
  </tbody>
</table>

并通过在tr末尾添加隐藏列来解决它

<thead>
  <tr>    
    <th>&nbsp;</th> <!-- column 1 -->
    <th colspan="2">&nbsp;</th> <!-- column 2&3 -->

    <!-- hidden column 4 for proper DataTable applying -->
    <th style="display: none"></th> 
  </tr>
</thead>

<tbody>
  <tr>
    <td>&nbsp;</td>
    <td>&nbsp;</td>
    <td>&nbsp;</td>

    <!-- hidden column 4 for proper DataTable applying -->
    <td style="display: none"></td>
  </tr>
</tbody>

对此的解释是，由于某些原因，DataTable不能应用于colspan位于最后th的表，但可以应用于colspan位于任何中间th的表。

这个解决方案有点俗气，但比我找到的任何其他解决方案都更简单、更短。

我希望这能帮助到一些人。

除了不一致的数字之外，数据表脚本列部分中缺少的项目也会导致这种情况。修正这修正了我的数据表搜索栏。

我说的是这部分;

"columns": [
  null,
  .
  .
  .
  null
           ],

我在这个错误中苦苦挣扎，直到有人指出，这个部分的“null”比我的总人头数少一个。