C#获取北京时间多种方法
#region 获取网络时间
///
{
DateTime res = DateTime.MinValue;
try
{
string url = "http://www.time.ac.cn/stime.asp";
HttpHelper helper = new HttpHelper();
helper.Encoding = Encoding.Default;
string html = helper.GetHtml(url);
string patDt = @"\d{4}年\d{1,2}月\d{1,2}日";
string patHr = @"hrs\s+=\s+\d{1,2}";
string patMn = @"min\s+=\s+\d{1,2}";
string patSc = @"sec\s+=\s+\d{1,2}";
Regex regDt = new Regex(patDt);
Regex regHr = new Regex(patHr);
Regex regMn = new Regex(patMn);
Regex regSc = new Regex(patSc);
res = DateTime.Parse(regDt.Match(html).Value);
int hr = GetInt(regHr.Match(html).Value, false);
int mn = GetInt(regMn.Match(html).Value, false);
int sc = GetInt(regSc.Match(html).Value, false);
res = res.AddHours(hr).AddMinutes(mn).AddSeconds(sc);
}
catch { }
return res;
}
///
{
if (string.IsNullOrEmpty(origin))
{
return0;
}
origin = origin.Trim();
if (!fullMatch)
{
string pat = @"-?\d+";
Regex reg = new Regex(pat);
origin = reg.Match(origin.Trim()).Value;
}
int res = 0;
int.TryParse(origin, out res);
return res;
}
#endregion
///
{
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// 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("
int monthIndex = html.IndexOf("
int dayIndex = html.IndexOf("
int hourIndex = html.IndexOf("
int miniteIndex = html.IndexOf("
int secondIndex = html.IndexOf("
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("2011-1-1");
}
catch (Exception)
{
return DateTime.Parse("2011-1-1");
}
finally
{
if (wrp != null)
wrp.Close();
if (wrt != null)
wrt.Abort();
}
return dt;
}
///
{
//t0 = new Date().getTime();
//nyear = 2011;
//nmonth = 7;
//nday = 5;
//nwday = 2;
//nhrs = 17;
//nmin = 12;
//nsec = 12; DateTime dt;
WebRequest wrt = null;
WebResponse wrp = null;
try
{
wrt = WebRequest.Create("http://www.beijing-time.org/time.asp");
wrp = wrt.GetResponse();
string html = string.Empty;
using (Stream stream = wrp.GetResponseStream())
{
using (StreamReader sr = new StreamReader(stream, Encoding.UTF8))
{
html = sr.ReadToEnd();
}
}
string[] tempArray = html.Split(';');
for (int i = 0; i < tempArray.Length; i++)
{
tempArray[i] = tempArray[i].Replace("\r\n", "");
}
string year = tempArray[1].Substring(tempArray[1].IndexOf("nyear=") + 6);
string month = tempArray[2].Substring(tempArray[2].IndexOf("nmonth=") + 7);
string day = tempArray[3].Substring(tempArray[3].IndexOf("nday=") + 5);
string hour = tempArray[5].Substring(tempArray[5].IndexOf("nhrs=") + 5);
string minite = tempArray[6].Substring(tempArray[6].IndexOf("nmin=") + 5);
string second = tempArray[7].Substring(tempArray[7].IndexOf("nsec=") + 5);
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;
}
///
{
DateTime dt;
//返回国际标准时间
//只使用的时间服务器的IP地址，未使用域名
try
{
string[,] 时间服务器 = new string[14, 2];
int[] 搜索顺序 = new int[] { 3, 2, 4, 8, 9, 6, 11, 5, 10, 0, 1, 7, 12 };
时间服务器[0, 0] = "time-a.nist.gov";
时间服务器[0, 1] = "129.6.15.28";
时间服务器[1, 0] = "time-b.nist.gov";
时间服务器[1, 1] = "129.6.15.29";
时间服务器[2, 0] = "time-a.timefreq.bldrdoc.gov";
时间服务器[2, 1] = "132.163.4.101";
时间服务器[3, 0] = "time-b.timefreq.bldrdoc.gov";
时间服务器[3, 1] = "132.163.4.102";
时间服务器[4, 0] = "time-c.timefreq.bldrdoc.gov";
时间服务器[4, 1] = "132.163.4.103";
时间服务器[5, 0] = "utcnist.colorado.edu";
时间服务器[5, 1] = "128.138.140.44";
时间服务器[6, 0] = "time.nist.gov";
时间服务器[6, 1] = "192.43.244.18";
时间服务器[7, 0] = "time-nw.nist.gov";
时间服务器[7, 1] = "131.107.1.10";
时间服务器[8, 0] = "nist1.symmetricom.com";
时间服务器[8, 1] = "69.25.96.13";
时间服务器[9, 0] = "nist1-dc.glassey.com";
时间服务器[9, 1] = "216.200.93.8";
时间服务器[10, 0] = "nist1-ny.glassey.com";
时间服务器[10, 1] = "208.184.49.9";
时间服务器[11, 0] = "nist1-sj.glassey.com";
时间服务器[11, 1] = "207.126.98.204";
时间服务器[12, 0] = "nist1.aol-ca.truetime.com";
时间服务器[12, 1] = "207.200.81.113";
时间服务器[13, 0] = "nist1.aol-va.truetime.com";
时间服务器[13, 1] = "64.236.96.53";
int portNum = 13;
string hostName;
byte[] bytes = new byte[1024];
int bytesRead = 0;
System.Net.Sockets.TcpClient client = new System.Net.Sockets.TcpClient();
for (int i = 0; i < 13; i++)
{
hostName = 时间服务器[搜索顺序[i], 1];
try
{
client.Connect(hostName, portNum);
System.Net.Sockets.NetworkStream ns = client.GetStream();
bytesRead = ns.Read(bytes, 0, bytes.Length);
client.Close();
break;
}
catch (System.Exception)
{
}
}
char[] sp = new char[1];
sp[0] = ' ';
dt = new DateTime();
string str1;
str1 = System.Text.Encoding.ASCII.GetString(bytes, 0, bytesRead);
string[] s;
s = str1.Split(sp);
if (s.Length >= 2)
{
dt = System.DateTime.Parse(s[1] + "" + s[2]);//得到标准时间
dt = dt.AddHours(8);//得到北京时间*/ }
else
{
dt = DateTime.Parse("2011-1-1");
}
}
catch (Exception)
{
dt = DateTime.Parse("2011-1-1");
}
return dt;
}