easyui detailview拿到自表格的行

//查詢

function searchData() {

var invoiceCode = $(’#invoiceCode’).textbox(‘getValue’);

$(’#center_dg’).datagrid({

view: detailview,

method : ‘get’,

queryParams: {

invoiceCode: invoiceCode

},

url:’/mtPaybackBilling/getMtBillingInfoListOfInvoiceCode’,

detailFormatter:function(index,row){
	          //  return '<div style="padding:2px;position:relative;"><table class="ddv"></table></div>';
	 	    	return '<table id="ddv-' + index + '"></table>';
	 	    },
	        onExpandRow: function(index,row){
	            //var ddv = $(this).datagrid('getRowDetail',index).find('table.ddv');
	            $('#ddv-'+index).datagrid({
	            	method : 'get',
	                url:'/mtPaybackBilling/getMtPaybackBillingList?billingCode='+row.billingCode,
	                //fitColumns:true,
	                singleSelect:true,
	                rownumbers:true,
	                loadMsg:'',
	                height:'auto',
	                columns:[[
		                   // {field:'sewid',width:100 ,sortable:true,title:'預警主鍵'},
		                    {field:'paybackCode',width:186,sortable:true,title:"回款單号"},
		                    {field:'legalBy',width:80,sortable:true,title:'所有人'},
		                    {field:'endCustomer',width:170,sortable:true,title:'終端客戶'},
		                    {field:'invoiceDate',width:100,sortable:true,title:'開票日期',formatter:common.formatDate},
		                    {field:'endInvoiceAmount',width:100,sortable:true,align:'right',title:'開票金額'},
		                    {field:'invoiceCode',width:100,sortable:true,title:'發票編碼'},
		                    
							{field:'paybackDate',width:150,sortable:true,title:'回款日期',formatter:common.formatDate},
							{field:'actualAmount',width:100,align:'right',sortable:true,title:'實際回款金額'},
							{field:'purchaseInvoiceAmount',width:100,sortable:true,align:'right',title:'采購金額'},
							{field:'sumAddTaxAndSurcharge',width:110,align:'right',sortable:true,title:'增值稅及附加稅'},
							{field:'handlingFee',width:100,align:'right',sortable:true,title:'企業所得稅'}, 
							
							{field:'sumTaxAndSurcharge',width:160,align:'right',sortable:true,title:'服務中心增值稅及附加'},
							{field:'netProfit',width:100,align:'right',sortable:true,title:'淨利潤'},
							{field:'firmInvoiceAmount',width:130,align:'right',sortable:true,title:'服務中心利潤100%'},
							{field:'firmAmountYesInvoice',width:130,align:'right',sortable:true,title:'服務中心利潤20%'},
							{field:'firmAmountNoInvoice',width:130,align:'right',sortable:true,title:'服務中心利潤80%'},
							{field:'mtInvoiceAmount',width:130,align:'right',sortable:true,title:'有限退服務中心利潤'},
							{field:'factoryInvoiceAmount',width:100,align:'right',sortable:true,title:'慕添付企乘'},
							{field:'serviceCenterName',width:200,sortable:true,title:'服務公司名稱'}
		                    
		                ]],
	                    onResize:function(){
	                        $('#center_dg').datagrid('fixDetailRowHeight',index);
	                    },
	                    onLoadSuccess:function(){
	                        setTimeout(function(){
	                            $('#center_dg').datagrid('fixDetailRowHeight',index);
	                        },0);
	                    }
	            });
	            $('#center_dg').datagrid('fixDetailRowHeight',index);
	            
	        }
 		});
	}
           

拿到自表格的行：

<button  class="easyui-linkbutton"   plain=false  iconCls="icon-search"   		onclick="test()" > 測試</button>

function test(){
    	var parentRow = $("#center_dg").datagrid('getSelected');
		var parentSelIndex = $("#center_dg").datagrid('getRowIndex',parentRow);
		var sonRow = $('#ddv-'+parentSelIndex).datagrid('getSelected');
		
    }