获取标准北京时间

#region 获取标准北京时间
///<summary>
/// 获取标准北京时间
///</summary>
///<returns></returns>
public static DateTime GetStandardTime()
{
//<?xml version="1.0" encoding="GB2312" ?>
//- <ntsc>
//- <time>
//  <year>2011</year>
//  <month>7</month>
//  <day>10</day>
//  <Weekday />
//  <hour>19</hour>
//  <minite>45</minite>
//  <second>37</second>
//  <Millisecond />
//  </time>
//  </ntsc>
DateTime dt;
WebRequest wrt = null;
WebResponse wrp = null;
try
{
wrt = WebRequest.Create("http://www.time.ac.cn/timeflash.asp?user=flash");
wrt.Credentials = CredentialCache.DefaultCredentials;

wrp = wrt.GetResponse();
StreamReader sr = new StreamReader(wrp.GetResponseStream(), Encoding.UTF8);
string html = sr.ReadToEnd();

sr.Close();
wrp.Close();

int yearIndex = html.IndexOf("<year>") + 6;
int monthIndex = html.IndexOf("<month>") + 7;
int dayIndex = html.IndexOf("<day>") + 5;
int hourIndex = html.IndexOf("<hour>") + 6;
int miniteIndex = html.IndexOf("<minite>") + 8;
int secondIndex = html.IndexOf("<second>") + 8;

string year = html.Substring(yearIndex, html.IndexOf("</year>") - yearIndex);
string month = html.Substring(monthIndex, html.IndexOf("</month>") - monthIndex); ;
string day = html.Substring(dayIndex, html.IndexOf("</day>") - dayIndex);
string hour = html.Substring(hourIndex, html.IndexOf("</hour>") - hourIndex);
string minite = html.Substring(miniteIndex, html.IndexOf("</minite>") - miniteIndex);
string second = html.Substring(secondIndex, html.IndexOf("</second>") - secondIndex);
dt = DateTime.Parse(year + "-" + month + "-" + day + " " + hour + ":" + minite + ":" + second);
}
catch (WebException)
{
return DateTime.Parse("2011-1-1");
}
catch (Exception)
{
return DateTime.Parse("2011-1-1");
}
finally
{
if (wrp != null)
wrp.Close();
if (wrt != null)
wrt.Abort();
}
return dt;
}

#endregion