How to bind Json data source using EasyUI

<table id="dg" class="easyui-datagrid" style="width:100%;height:100%;" title="需要设置表格标题" data-options=" 
        rownumbers:true, 
        singleSelect:true, 
        @*autoRowHeight:false,*@ 
        pagination:true 
        @*pageSize:10*@"> 
      <thead> 
        <tr> 
          <th field="colum1">列1</th> 
          <th field="colum2">列2</th> 
          <th field="colum3">列3</th> 
          <th field="colum4">列4</th> 
          <th field="colum5">列5</th> 
          <th field="colum6">列6</th> 
        </tr> 
      </thead> 
    </table>

(function ($) { 
  function pagerFilter(data) { 
    if ($.isArray(data)) { // is array 
      data = { 
        total: data.length, 
        rows: data 
      } 
    } 
    var target = this; 
    var dg = $(target); 
    var state = dg.data('datagrid'); 
    var opts = dg.datagrid('options'); 
    if (!state.allRows) { 
      state.allRows = (data.rows); 
    } 
    if (!opts.remoteSort && opts.sortName) { 
      var names = opts.sortName.split(','); 
      var orders = opts.sortOrder.split(','); 
      state.allRows.sort(function (r1, r2) { 
        var r = 0; 
        for (var i = 0; i < names.length; i++) { 
          var sn = names[i]; 
          var so = orders[i]; 
          var col = $(target).datagrid(&#39;getColumnOption&#39;, sn); 
          var sortFunc = col.sorter || function (a, b) { 
            return a == b ? 0 : (a > b ? 1 : -1); 
          }; 
          r = sortFunc(r1[sn], r2[sn]) * (so == &#39;asc&#39; ? 1 : -1); 
          if (r != 0) { 
            return r; 
          } 
        } 
        return r; 
      }); 
    } 
    var start = (opts.pageNumber - 1) * parseInt(opts.pageSize); 
    var end = start + parseInt(opts.pageSize); 
    data.rows = state.allRows.slice(start, end); 
    return data; 
  } 
 
  var loadDataMethod = $.fn.datagrid.methods.loadData; 
  var deleteRowMethod = $.fn.datagrid.methods.deleteRow; 
  $.extend($.fn.datagrid.methods, { 
    clientPaging: function (jq) { 
      return jq.each(function () { 
        var dg = $(this); 
        var state = dg.data(&#39;datagrid&#39;); 
        var opts = state.options; 
        opts.loadFilter = pagerFilter; 
        var onBeforeLoad = opts.onBeforeLoad; 
        opts.onBeforeLoad = function (param) { 
          state.allRows = null; 
          return onBeforeLoad.call(this, param); 
        } 
        var pager = dg.datagrid(&#39;getPager&#39;); 
        pager.pagination({ 
          onSelectPage: function (pageNum, pageSize) { 
            opts.pageNumber = pageNum; 
            opts.pageSize = pageSize; 
            pager.pagination(&#39;refresh&#39;, { 
              pageNumber: pageNum, 
              pageSize: pageSize 
            }); 
            dg.datagrid(&#39;loadData&#39;, state.allRows); 
          } 
        }); 
        $(this).datagrid(&#39;loadData&#39;, state.data); 
        if (opts.url) { 
          $(this).datagrid(&#39;reload&#39;); 
        } 
      }); 
    }, 
    loadData: function (jq, data) { 
      jq.each(function () { 
        $(this).data(&#39;datagrid&#39;).allRows = null; 
      }); 
      return loadDataMethod.call($.fn.datagrid.methods, jq, data); 
    }, 
    deleteRow: function (jq, index) { 
      return jq.each(function () { 
        var row = $(this).datagrid(&#39;getRows&#39;)[index]; 
        deleteRowMethod.call($.fn.datagrid.methods, $(this), index); 
        var state = $(this).data(&#39;datagrid&#39;); 
        if (state.options.loadFilter == pagerFilter) { 
          for (var i = 0; i < state.allRows.length; i++) { 
            if (state.allRows[i] == row) { 
              state.allRows.splice(i, 1); 
              break; 
            } 
          } 
          $(this).datagrid(&#39;loadData&#39;, state.allRows); 
        } 
      }); 
    }, 
    getAllRows: function (jq) { 
      return jq.data(&#39;datagrid&#39;).allRows; 
    } 
  }) 
})(jQuery);

  $.ajax({ 
    type: "get",  //AJAX提交方式 
    url: "路径", 
    datatype: "json", 
    data: "userid=" + "id"+ "&username=" + "name",  //向后台传递参数，无需传递参数就可以删除 
    success: function (data) { 
      var rows = []; 
       
      for (var i = 0; i < data.length; i++) {   //data是返回值的集合 
        rows.push({               //把data数据对应的值压到rows对应数组中 
          colum1: data[i].userid, 
          colum2: data[i].leve, 
          colum3: data[i].Username, 
          colum4: data[i].Tel, 
          colum5: data[i].Mail, 
          colum6: data[i].Explain 
        }); 
      } 
      $(&#39;#dg&#39;).datagrid({ data: rows }).datagrid(&#39;clientPaging&#39;); 
    }, error: function () {            //执行出错时执行的方法 
      $.messager.alert("操作提示", "表格失败，请联系管理员！", "warning"); 
    } 
  });

<table id="dg" class="easyui-datagrid" title="需要显示表格标题 " data-options="         
        rownumbers:true, 
        singleSelect:true, 
        autoRowHeight:false, 
        pagination:true, 
        "> 
        <thead> 
          <tr> 
            <th data-options="field:&#39;colum1&#39;,align:&#39;center&#39;">列名1</th> 
            <th data-options="field:&#39;colum2&#39;,align:&#39;center&#39;">列名2</th> 
            <th data-options="field:&#39;colum3&#39;,align:&#39;center&#39;">列名3</th> 
            <th data-options="field:&#39;colum4&#39;,align:&#39;center&#39;">列名4</th> 
            <th data-options="field:&#39;colum5&#39;,align:&#39;center&#39;">列名5</th> 
            <th data-options="field:&#39;colum6&#39;,align:&#39;center&#39;">列名6</th> 
          </tr> 
        </thead> 
      </table>

 $('#dg').datagrid({ 
    url: '路径?Name=' + Name + "&combox=" + combox,  //设置访问后台路径和传递参数，如果没有参数可以删除 
    dataType: 'json', 
    width: "100%", //宽度 
    striped: true, //把行条纹化（奇偶行背景色不同） 
    idField: 'quesID', //标识字段 
    loadMsg: '正在加载用户的信息.......', //从远程站点加载数据是，显示的提示消息 
    pagination: true, //数据网格底部显示分页工具栏 
    singleSelect: false, //只允许选中一行 
    pageList: [10, 20, 30, 40, 50], //设置每页记录条数的列表 
    pageSize: 10, //初始化页面尺寸（默认分页大小） 
    pageNumber: 1, //初始化页面（默认显示第一页） 
    beforePageText: '第', //页数文本框前显示的汉字  
    afterPageText: '页 共 {pages} 页', 
    displayMsg: '第{from}到{to}条，共{total}条', 
    columns: [[ //每页具体内容 
          { field: 'colum1', title: '标题1', width: "13%", align: 'center', editor: 'text' }, 
          { field: 'colum2', title: '标题2', width: "13%", align: 'center', editor: 'text' }, 
          { field: 'colum3', title: '标题3', width: "13%", align: 'center', editor: 'text' }, 
          { field: 'colum4', title: '标题4', width: "13%", align: 'center', editor: 'text' }, 
          { field: 'colum5', title: '标题5', width: "13%", align: 'center', editor: 'text' }, 
          { field: 'colum6', title: ' 标题6 ', width: "13%", align: 'center', editor: 'text' }, 
    ]], 
 
    onLoadSuccess: function (data) { 
 
      //表格加载成功后执行的代码，如果不需要可以删除 
    } 
  })