C#实现从网络同步标准北京时间的方法

本文实例讲述了C#实现从网络同步标准北京时间的方法。分享给大家供大家参考。具体分析如下：

这段C#代码可以从http://www.time.ac.cn网站上获取标准的北京时间，只需简单的组合即可让本地服务器实时同步正确的北京时间

#region
/// 

/// 获取标准北京时间
/// /// 
/// /// 
///
public static DateTime GetStandardTime()   
{
/// //
//- 
//- 
// 2013
// 8
// 29 
//  
// 16
// 29
// 12 
// 
//  
//  
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("") + 6;
  int monthIndex = html.IndexOf("") + 7;
  int dayIndex = html.IndexOf("") + 5;
  int hourIndex = html.IndexOf("") + 6;
  int miniteIndex = html.IndexOf("") + 8;
  int secondIndex = html.IndexOf("") + 8;
  string year = html.Substring(yearIndex, html.IndexOf("") - yearIndex);
  string month = html.Substring(monthIndex, html.IndexOf("") - monthIndex);
  string day = html.Substring(dayIndex, html.IndexOf("") - dayIndex);
  string hour = html.Substring(hourIndex, html.IndexOf("") - hourIndex);
  string minite = html.Substring(miniteIndex, html.IndexOf("") - miniteIndex);
  string second = html.Substring(secondIndex, html.IndexOf("") - secondIndex);
  dt = DateTime.Parse(year + "-" + month + "-" + day + " " + hour + ":" + minite + ":" + second);
}
catch (WebException)
{
  return DateTime.Parse("2013-1-1");
}
catch (Exception)
{
  return DateTime.Parse("2013-1-1");
}
finally
{
  if (wrp != null)
 wrp.Close();
  if (wrt != null)
 wrt.Abort();
}
   return dt;
 }
#endregion

希望本文所述对大家的C#程序设计有所帮助。