时间日期函数
网上摘的:
/// <summary>判断当前年份是否是闰年,私有函数</summary>
/// <param name="dt">年份</param>
/// <returns>是闰年:True ,不是闰年:False</returns>
private static bool IsRuYear(int iYear)
{
//形式参数为年份
//例如:2003
int n;
n = iYear;
if ((n % 400 == 0) || (n % 4 == 0 && n % 100 != 0))
{
return true;
}
else
{
return false;
}
}
/// <param name="dt">年份</param>
/// <returns>是闰年:True ,不是闰年:False</returns>
private static bool IsRuYear(int iYear)
{
//形式参数为年份
//例如:2003
int n;
n = iYear;
if ((n % 400 == 0) || (n % 4 == 0 && n % 100 != 0))
{
return true;
}
else
{
return false;
}
}
/// <summary>是否日期</summary>
/// <param name="strInput">输入字符串</param>
/// <returns>true/false</returns>
public bool isDate(string strInput)
{
string datestr = strInput;
string year, month, day;
string[] c = { "/", "-", "." };
string cs = "";
for (int i = 0; i < c.Length; i++)
{
if (datestr.IndexOf(c[i]) > 0)
{
cs = c[i];
break;
}
};
if (cs != "")
{
year = datestr.Substring(0, datestr.IndexOf(cs));
if (year.Length != 4) { return false; };
datestr = datestr.Substring(datestr.IndexOf(cs) + 1);
month = datestr.Substring(0, datestr.IndexOf(cs));
if ((month.Length != 2) || (Convert.ToInt16(month) > 12))
{ return false; };
datestr = datestr.Substring(datestr.IndexOf(cs) + 1);
day = datestr;
if ((day.Length != 2) || (Convert.ToInt16(day) > 31)) { return false; };
return checkDatePart(year, month, day);
}
else
{
return false;
}
}
/// <param name="strInput">输入字符串</param>
/// <returns>true/false</returns>
public bool isDate(string strInput)
{
string datestr = strInput;
string year, month, day;
string[] c = { "/", "-", "." };
string cs = "";
for (int i = 0; i < c.Length; i++)
{
if (datestr.IndexOf(c[i]) > 0)
{
cs = c[i];
break;
}
};
if (cs != "")
{
year = datestr.Substring(0, datestr.IndexOf(cs));
if (year.Length != 4) { return false; };
datestr = datestr.Substring(datestr.IndexOf(cs) + 1);
month = datestr.Substring(0, datestr.IndexOf(cs));
if ((month.Length != 2) || (Convert.ToInt16(month) > 12))
{ return false; };
datestr = datestr.Substring(datestr.IndexOf(cs) + 1);
day = datestr;
if ((day.Length != 2) || (Convert.ToInt16(day) > 31)) { return false; };
return checkDatePart(year, month, day);
}
else
{
return false;
}
}
[string.Format----GetDateTimeFormats]2007年05月09日 星期三 下午 03:24c# 日期函数
Convert.ToDateTime(dr["wfsj"]).ToString("yyyy年MM月dd日 hh时mm分ss秒")
DateTime dt = DateTime.Now;
Label1.Text = dt.ToString();//2005-11-5 13:21:25
Label2.Text = dt.ToFileTime().ToString();//127756416859912816
Label3.Text = dt.ToFileTimeUtc().ToString();//127756704859912816
Label4.Text = dt.ToLocalTime().ToString();//2005-11-5 21:21:25
Label5.Text = dt.ToLongDateString().ToString();//2005年11月5日
Label6.Text = dt.ToLongTimeString().ToString();//13:21:25
Label7.Text = dt.ToOADate().ToString();//38661.5565508218
Label8.Text = dt.ToShortDateString().ToString();//2005-11-5
Label9.Text = dt.ToShortTimeString().ToString();//13:21
Label10.Text = dt.ToUniversalTime().ToString();//2005-11-5 5:21:25
?2005-11-5 13:30:28.4412864
Label1.Text = dt.Year.ToString();//2005
Label2.Text = dt.Date.ToString();//2005-11-5 0:00:00
Label3.Text = dt.DayOfWeek.ToString();//Saturday
Label4.Text = dt.DayOfYear.ToString();//309
Label5.Text = dt.Hour.ToString();//13
Label6.Text = dt.Millisecond.ToString();//441
Label7.Text = dt.Minute.ToString();//30
Label8.Text = dt.Month.ToString();//11
Label9.Text = dt.Second.ToString();//28
Label10.Text = dt.Ticks.ToString();//632667942284412864
Label11.Text = dt.TimeOfDay.ToString();//13:30:28.4412864
Label1.Text = dt.ToString();//2005-11-5 13:47:04
Label2.Text = dt.AddYears(1).ToString();//2006-11-5 13:47:04
Label3.Text = dt.AddDays(1.1).ToString();//2005-11-6 16:11:04
Label4.Text = dt.AddHours(1.1).ToString();//2005-11-5 14:53:04
Label5.Text = dt.AddMilliseconds(1.1).ToString();//2005-11-5 13:47:04
Label6.Text = dt.AddMonths(1).ToString();//2005-12-5 13:47:04
Label7.Text = dt.AddSeconds(1.1).ToString();//2005-11-5 13:47:05
Label8.Text = dt.AddMinutes(1.1).ToString();//2005-11-5 13:48:10
Label9.Text = dt.AddTicks(1000).ToString();//2005-11-5 13:47:04
Label10.Text = dt.CompareTo(dt).ToString();//0
//Label11.Text = dt.Add(?).ToString();//问号为一个时间段
Label1.Text = dt.Equals("2005-11-6 16:11:04").ToString();//False
Label2.Text = dt.Equals(dt).ToString();//True
Label3.Text = dt.GetHashCode().ToString();//1474088234
Label4.Text = dt.GetType().ToString();//System.DateTime
Label5.Text = dt.GetTypeCode().ToString();//DateTime
Convert.ToDateTime(dr["wfsj"]).ToString("yyyy年MM月dd日 hh时mm分ss秒")
DateTime dt = DateTime.Now;
Label1.Text = dt.ToString();//2005-11-5 13:21:25
Label2.Text = dt.ToFileTime().ToString();//127756416859912816
Label3.Text = dt.ToFileTimeUtc().ToString();//127756704859912816
Label4.Text = dt.ToLocalTime().ToString();//2005-11-5 21:21:25
Label5.Text = dt.ToLongDateString().ToString();//2005年11月5日
Label6.Text = dt.ToLongTimeString().ToString();//13:21:25
Label7.Text = dt.ToOADate().ToString();//38661.5565508218
Label8.Text = dt.ToShortDateString().ToString();//2005-11-5
Label9.Text = dt.ToShortTimeString().ToString();//13:21
Label10.Text = dt.ToUniversalTime().ToString();//2005-11-5 5:21:25
?2005-11-5 13:30:28.4412864
Label1.Text = dt.Year.ToString();//2005
Label2.Text = dt.Date.ToString();//2005-11-5 0:00:00
Label3.Text = dt.DayOfWeek.ToString();//Saturday
Label4.Text = dt.DayOfYear.ToString();//309
Label5.Text = dt.Hour.ToString();//13
Label6.Text = dt.Millisecond.ToString();//441
Label7.Text = dt.Minute.ToString();//30
Label8.Text = dt.Month.ToString();//11
Label9.Text = dt.Second.ToString();//28
Label10.Text = dt.Ticks.ToString();//632667942284412864
Label11.Text = dt.TimeOfDay.ToString();//13:30:28.4412864
Label1.Text = dt.ToString();//2005-11-5 13:47:04
Label2.Text = dt.AddYears(1).ToString();//2006-11-5 13:47:04
Label3.Text = dt.AddDays(1.1).ToString();//2005-11-6 16:11:04
Label4.Text = dt.AddHours(1.1).ToString();//2005-11-5 14:53:04
Label5.Text = dt.AddMilliseconds(1.1).ToString();//2005-11-5 13:47:04
Label6.Text = dt.AddMonths(1).ToString();//2005-12-5 13:47:04
Label7.Text = dt.AddSeconds(1.1).ToString();//2005-11-5 13:47:05
Label8.Text = dt.AddMinutes(1.1).ToString();//2005-11-5 13:48:10
Label9.Text = dt.AddTicks(1000).ToString();//2005-11-5 13:47:04
Label10.Text = dt.CompareTo(dt).ToString();//0
//Label11.Text = dt.Add(?).ToString();//问号为一个时间段
Label1.Text = dt.Equals("2005-11-6 16:11:04").ToString();//False
Label2.Text = dt.Equals(dt).ToString();//True
Label3.Text = dt.GetHashCode().ToString();//1474088234
Label4.Text = dt.GetType().ToString();//System.DateTime
Label5.Text = dt.GetTypeCode().ToString();//DateTime