Jquery Datatable默认排序不起作用

Question

我有一个包含3列A，B和C的表。现在默认情况下，我想在开始时基于C对其进行排序。但我不知道为什么它不起作用。它显示了列C上的向下箭头，但数据未排序。

{
  "processing": true,
  "scrollX": true,
  "columns": [
    {
        bSortable: true
        bVisible: true
        data: "A"
        filtering: true
        label: "A"
        mData: "A"
        mRender: (data, type, row)
        orderable: true
        render: (data, type, row)
        total: false
        visible: true
    },
    {
        bSortable: true
        bVisible: true
        data: "B"
        filtering: true
        label: "B"
        mData: "B"
        mRender: (data, type, row)
        orderable: true
        render: (data, type, row)
        total: false
        visible: true
    },
     {
        bSortable: true
        bVisible: true
        data: "C"
        filtering: true
        label: "C"
        mData: "C"
        mRender: (data, type, row)
        orderable: true
        render: (data, type, row)
        total: false
        visible: true
    },
  ],
  "pageLength": 10,
  "paging": true,
  "pagingType": "simple_numbers",
  "lengthChange": false,
  "bPaginate": false,
  "bDeferRender": true,
  "bSortable": true,
  "columnDefs": [],
  "searching": false,
  "oScroll": {
    "iBarWidth": 7
  },
  "dom": "frtlS",
  "aaSorting": [ [ 2, "desc" ] ],
  "aoColumnDefs": [
    {
      "aTargets": [ 0 ], "bSortable": true
    },
    {
      "aTargets": [ 1 ], "bSortable": true
    },
    {
      "aTargets": [ 2 ], "bSortable": true
    }
  ]
}

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