<table title="" id="dataTable" class="easyui-datagrid" style="height: 500px;" data-options="
 url: '/ajaxget.aspx">
 </table>

//行双击事件
function onDblClickRow() {
var item = $('#dataTable').datagrid("getSelected");
if (item != null) {
editId = item.Id;
var html = "";
html += "项目名称：" + item.ProjectName + "<br/>";
html += "项目编号：" + item.ProjectNum + "<br/>";
html += "<br/>"; 
show(item.ProjectName + " 项目详情", html); 
}
}

<div id="details" style="padding: 10px;line-height:20px;font-size:12px"></div>
function show(title, msg) { 
$('#details').html("<div id=\"output\" style=\"width:99%;height:96%;border:0\">" + msg + "</div>");
$('#details').dialog({
title: title,
width: 800,
height: 400,
iconCls: 'icon-custom-eye',
closed: false,
cache: false,
modal: true
});
}