c#个人记录常用方法(更新中)

//使用时,先将秒Convert.ToInt64,返回格式2015-2-10 14:03:33
public DateTime JavaTimeToC(long ltime)
{
long time_JAVA_Long = ltime;//java长整型日期，毫秒为单位
DateTime dt_1970 = new DateTime(1970, 1, 1);
long tricks_1970 = dt_1970.Ticks;//1970年1月1日刻度
long time_tricks = tricks_1970 + time_JAVA_Long * 10000;//日志日期刻度
DateTime dt = new DateTime(time_tricks, DateTimeKind.Unspecified).AddHours(8);//转化为DateTime
return dt;
}

public static string NoHTML(string Htmlstring)
{
//删除脚本
//删除HTML
Htmlstring = Regex.Replace(Htmlstring, @"<(.[^>]*)>", "", RegexOptions.IgnoreCase);
Htmlstring = Regex.Replace(Htmlstring, @"([\r\n])[\s]+", "", RegexOptions.IgnoreCase);
Htmlstring = Regex.Replace(Htmlstring, @"-->", "", RegexOptions.IgnoreCase);
Htmlstring = Regex.Replace(Htmlstring, @"<!--.*", "", RegexOptions.IgnoreCase);
Htmlstring = Regex.Replace(Htmlstring, @"&(quot|#34);", "\"", RegexOptions.IgnoreCase);
Htmlstring = Regex.Replace(Htmlstring, @"&(amp|#38);", "&", RegexOptions.IgnoreCase);
Htmlstring = Regex.Replace(Htmlstring, @"&(lt|#60);", "<", RegexOptions.IgnoreCase);
Htmlstring = Regex.Replace(Htmlstring, @"&(gt|#62);", ">", RegexOptions.IgnoreCase);
Htmlstring = Regex.Replace(Htmlstring, @"&(nbsp|#160);", " ", RegexOptions.IgnoreCase);
Htmlstring = Regex.Replace(Htmlstring, @"&(iexcl|#161);", "\xa1", RegexOptions.IgnoreCase);
Htmlstring = Regex.Replace(Htmlstring, @"&(cent|#162);", "\xa2", RegexOptions.IgnoreCase);
Htmlstring = Regex.Replace(Htmlstring, @"&(pound|#163);", "\xa3", RegexOptions.IgnoreCase);
Htmlstring = Regex.Replace(Htmlstring, @"&(copy|#169);", "\xa9", RegexOptions.IgnoreCase);
Htmlstring = Regex.Replace(Htmlstring, @"&#(\d+);", "", RegexOptions.IgnoreCase);
Htmlstring = Htmlstring.Replace("<", "<");
Htmlstring = Htmlstring.Replace(">", ">");
Htmlstring = Htmlstring.Replace("\r\n", "");
return Htmlstring;
}