C#后台获取ajax传来的xml格式数据值

前台：

var xml = "<root>";
if(Name!=null)
{
xml += "<name>"+Name +"</name>";
}
else
{
alert("请输入站点名称");
return;
}
if(icp!=null)
{
xml +="<icp>"+icp+"</icp>";
}
else
{
alert("请输入备案信息");
return;
}
xml +="</root>";
$.ajax({
type:"post",
url:"updata.ashx?datetime="+new Date().getDate(),
dataType:"text",
data:"&data="+encodeURIComponent(encodeURIComponent(xml)),
success:function(obj)
{
//do some things
}
})

后台

string data = context.Request.Form["data"].ToString();
data = "<?xml version=\"1.0\" encoding=\"GB2312\" ?>" + data;
XmlDocument doc = new XmlDocument();
doc.LoadXml(HttpUtility.UrlDecode(data));

XmlNode Title = doc.SelectSingleNode("root/Title");
XmlNode Content = doc.SelectSingleNode("root/Content");