javascript - jquery datatables 在页面上导航时在分页表上重置所选行的数据

Question

我正在使用 jquery 数据表。 http://jsfiddle.net/s3j5pbj4/2/ 我在分页表中填充了大约 3000 条记录。问题是，如果我在第一页中选择几个复选框和下拉选项并移至下一页(通过单击分页下一个按钮)并再次返回第一页，则所选数据将被重置再次(即，假设每个分页页面在每页上显示 10 行，如果我在第一页上选择了 5 行，然后导航到下一页，然后再次返回第一页，所选行的数据再次重置)。我希望我的用户应该能够看到他在任何页面上所做的所有选择，然后提交。

    $(document).ready(function() {
            var oTable = $('#dbResultsTable').dataTable({
                "sPaginationType": "full_numbers" ,
                "paging":   true,
                "ordering" : true,
                "scrollY":false,
                "autoWidth": false,
                "serverSide": false,
                 "processing": false,
                  "bDeferRender": true,
                "info":     true ,
                "lengthMenu": [[10,25,50 ,100, -1], [10,25,50, 100, "All"]],
                "scrollX": "100%" ,
                 "aoColumns":[

            { "mDataProp": null},

            { "mDataProp": "operation"}
      ],

        "sAjaxSource" : "ResultPopulator",
        "bJQueryUI" : true,
        fnRowCallback : function(nRow,aaData, iDisplayIndex) {

        jQuery('td:eq(0)', nRow).html('<input id="checkId_' + nRow+ 'name="" type="checkbox")>');
        var operationString = '<select name="operation" >';

        operationString = operationString + '<option selected disabled hidden value=""></option>';
for ( var i = 0; i < aaData.operation.length; i++) {
operationString = operationString+ '<option>'   + aaData.operation[i]+ '</option>';
}

    operationString = operationString   + '</select>';
jQuery('td:eq(1)', nRow).html(operationString);
return nRow;
},
}
);

});

function validateFields(){
    var status = true;
     var rowSelected = false ;
      var rows = $("#dbResultsTable").dataTable().fnGetNodes();
        for (var i = 0; i < rows.length; i++) {
            var cells = rows[i].cells;
            if(cells[0].children[0].checked){
                 rowSelected = true;
                 var operation =  cells[1].children[0].value;
                 if(operation==""){
                    var msz = " Please select an operation"  
                    status = false ;
                    printMsz(msz);
                     break;
                 }
            }
}

有人可以帮我解决这个问题吗？

Answer 1

请查看my solution at JSFiddle .

HTML

<table id="test" class="display">
    <thead><tr><th>select</th><th>operation</th></tr></thead>
    <tbody></tbody>
</table>

<p>
    <input id="test-data-json" name="test_data_json" type="hidden">
    <button id="btn-submit">Submit</button>
</p>

Javascript:

//ajax emulation
$.mockjax({
   url: '/test/0',
   responseTime: 200,
   responseText: {
      "aaData" : [
         [{"id":1}, {"chk":"on"}, {"operation":["Modify", "Delete"]}],
         [{"id":2}, {"chk":"on"}, {"operation":["Modify", "Delete"]}],
         [{"id":3}, {"chk":"on"}, {"operation":["Modify", "Delete"]}],
         [{"id":4}, {"chk":"on"}, {"operation":["Modify", "Delete"]}],
         [{"id":5}, {"chk":"on"}, {"operation":["Modify", "Delete"]}],
         [{"id":6}, {"chk":"on"}, {"operation":["Modify", "Delete"]}],
         [{"id":7}, {"chk":"on"}, {"operation":["Modify", "Delete"]}]
      ]
   }
});

// Global variable holding current state of the controls in the data table
var g_data = {};

var $table = $('#test');
$table.dataTable( {
   "lengthMenu": [[2,25,50 ,100, -1], [2,25,50, 100, "All"]],
   "pagingType": "full_numbers" ,
   "paging":   true,
   "ordering" : true,
   "scrollY":false,
   "autoWidth": false,
   "serverSide": false,
   "processing": false,
   "info":     true ,
   "deferRender": true,
   "processing": true,
   "columns": [
      ["data", 1 ],
      ["data", 2 ]
   ],
   "ajax" : {
      "url": "/test/0",
      "dataSrc" : function(json){
         var data = json.aaData;
         for (var i = 0; i < data.length; i++){
            var chk_name  = 'chk_' + data[i][0].id;

            // If checkbox was never checked
            if(typeof g_data[chk_name] === 'undefined'){
               // Retrieve checkbox state from received data
               g_data[chk_name] = (data[i][1].chk === 'on') ? true : false;
            }
         }

         return data;
      }
   },
   "createdRow" : function( row, data, index ){
      var chk_name  = 'chk_' + data[0].id;
      var chk_checked = (g_data[chk_name]) ? " checked" : "";

      $('td:eq(0)', row)
         .html('<input name="' + chk_name +'" type="checkbox" value="1"' + chk_checked + '>');

      var select_name = 'select_' + data[0].id;
      html =
         '<select name="' + select_name +'">'
          + '<option value="">Select one</option>'
          + '<option'
          + ((typeof g_data[select_name] !== 'undefined' && g_data[select_name] === data[2].operation[0]) ? ' selected' : '')
          + '>' + data[2].operation[0] + '</option>'
          + '<option'
          + ((typeof g_data[select_name] !== 'undefined' && g_data[select_name] === data[2].operation[1]) ? ' selected' : '')
          + '>' + data[2].operation[1] + '</option>';
          + '</select>';

      $('td:eq(1)', row).html(html);
   },
});

$('#test tbody').on('click', 'input[type=checkbox]', function (e){
   g_data[this.name] = this.checked;
});

$('#test tbody').on('change', 'select', function (e){
   if(this.selectedIndex != -1){
      var value = this.options[this.selectedIndex].value;
      g_data[this.name] = value;
   }
});

$('#btn-submit').on('click', function(){
   $('#test-data-json').val(JSON.stringify(g_data));
   console.log($('#test-data-json').val());
});

我稍微更新了您的代码，因为它是新选项和旧选项的混合。不过，我尚未使用 aaData 属性编辑旧服务器响应，因此您不必更改服务器端脚本。

基本上，解决方案是使用变量(在我的示例中为 g_data)来存储/检索动态表单控件的状态。

提交表单后，数据将作为 JSON 字符串存储在隐藏的 INPUT 元素中。

如果需要表单验证，请检查存储在 g_data 变量中的控件的状态。