datagrid 重新制定数据源

var emptyData = {"rows":[],"total":0};
guestDatagridEdit.datagrid("loadData",emptyData);

guestDatagridEdit = $('#guestDatagridEdit').datagrid({
title : '接待对象列表',
pagination : true,
pagePosition : 'bottom',
rownumbers : true,
pageSize : 10,
pageList : [ 10, 20, 30, 40 ],
fitColumns : true,
nowrap : false,
border : false,