为什么XDocument.Parse抛出NotSupportedException? [英] Why does XDocument.Parse throw NotSupportedException?
问题描述
我正在尝试使用XDocument解析xml数据.解析wchich引发NotSupportedException,就像在主题中一样:
I am trying to parse xml data using XDocument.Parse wchich throws NotSupportedException, just like in topic: Is XDocument.Parse different in Windows Phone 7? and I updated my code according to posted advice, but it still doesn't help. Some time ago I parsed RSS using similar (but simpler) method and that worked just fine.
public void sList()
{
WebClient client = new WebClient();
client.Encoding = Encoding.UTF8;
string url = "http://eztv.it";
Uri u = new Uri(url);
client.DownloadStringAsync(u);
client.DownloadStringCompleted += new DownloadStringCompletedEventHandler(client_DownloadStringCompleted);
}
private void client_DownloadStringCompleted(object sender, DownloadStringCompletedEventArgs e)
{
try
{
string s = e.Result;
s = cut(s);
XmlReaderSettings settings = new XmlReaderSettings();
settings.DtdProcessing = DtdProcessing.Ignore;
XDocument document = null;// XDocument.Parse(s);//Load(s);
using (XmlReader reader = XmlReader.Create(new StringReader(e.Result), settings))
{
document = XDocument.Load(reader); // error thrown here
}
// ... rest of code
}
catch (Exception ex)
{
MessageBox.Show( ex.Message);
}
}
string cut(string s)
{
int iod = s.IndexOf("<select name=\"SearchString\">");
int ido = s.LastIndexOf("</select>");
s = s.Substring(iod, ido - iod + 9);
return s;
}
当我用s代替
//string s = "<select name=\"SearchString\"><option value=\"308\">10 Things I Hate About You</option><option value=\"539\">2 Broke Girls</option></select>";
一切正常,不会引发异常,那我该怎么办?
Everything works and no exception is thrown, so what do I do wrong?
推荐答案
有特殊符号,例如'&'在e.Result
中.
There are special symbols like '&' in e.Result
.
我只是尝试用HttpUtility.HtmlEncode()
和XDocument
解析的符号替换此符号(除了'<','>',''以外的所有符号)
I just tried replace this symbols (all except '<', '>', '"') with HttpUtility.HtmlEncode()
and XDocument
parsed it
UPD:
我不想显示我的代码,但是你没有给我机会:)
I didn't want to show my code, but you left me no chance :)
string y = "";
for (int i = 0; i < s.Length; i++)
{
if (s[i] == '<' || s[i] == '>' || s[i] == '"')
{
y += s[i];
}
else
{
y += HttpUtility.HtmlEncode(s[i].ToString());
}
}
XDocument document = XDocument.Parse(y);
var options = (from option in document.Descendants("option")
select option.Value).ToList();
这对我来说适用于WP7. 请不要将此代码用于html转换.我很快就写了它只是为了测试目的
It's work for me on WP7. Please, do not use this code for html conversion. I wrote it quickly just for test purposes
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