ASP를 배워라.Net System.DateTime 구조
/* */
DateTime.MaxValue; //9999/12/31 23:59:59
DateTime.MinValue; //0001/01/01 00:00:00
/* */
DateTime.Now; //
DateTime.Today; //
DateTime.UtcNow; // (UTC)
/* */
DateTime.Compare(); // , -1、0、1
DateTime.DaysInMonth(); //
DateTime.Equals(); //
DateTime.FromBinary(); // ToBinary()
DateTime.FromFileTime(); // ToFileTime()
DateTime.FromFileTimeUtc(); // ToFileTimeUtc()
DateTime.FromOADate(); // ToOADate()
DateTime.IsLeapYear(); //
DateTime.Parse(); //
DateTime.ParseExact(); //
DateTime.ReferenceEquals(); //
DateTime.SpecifyKind(); //
DateTime.TryParse(); //
DateTime.TryParseExact(); //
/* */
Date; //
Day; // (1..31)
DayOfWeek; //
DayOfYear; // (1..366)
Hour; //
Kind; //
Millisecond; //
Minute; //
Month; //
Second; //
Ticks; //
TimeOfDay; //
Year; //
/* */
Add(); //+ TimeSpan
AddDays(); //+
AddHours(); //+
AddMilliseconds(); //+
AddMinutes(); //+
AddMonths(); //+
AddSeconds(); //+
AddTicks(); //+
AddYears(); //+
CompareTo(); // , -1、0、1
Equals(); //
GetDateTimeFormats(); //
IsDaylightSavingTime(); //
Subtract(); //- TimeSpan
ToBinary(); // long, Ticks
ToFileTime(); // Windows , long
ToFileTimeUtc(); // UTC Windows
ToLocalTime(); //
ToLongDateString(); //
ToLongTimeString(); //
ToOADate(); // OLE , double
ToShortDateString(); //
ToShortTimeString(); //
ToString(); //
ToUniversalTime(); // UTC 일반적인 구조 함수:
protected void Button1_Click(object sender, EventArgs e)
{
const string fmt = "yyyy-MM-dd HH:mm:ss fff
";
string s1 = new DateTime().ToString(fmt); //0001-01-01 00:00:00 000
string s2 = new DateTime(634295342967890000).ToString(fmt); //2011-01-02 03:04:56 789
string s3 = new DateTime(2011, 1, 2).ToString(fmt); //2011-01-02 00:00:00 000
string s4 = new DateTime(2011, 1, 2, 3, 4, 56).ToString(fmt); //2011-01-02 03:04:56 000
string s5 = new DateTime(2011, 1, 2, 3, 4, 56, 789).ToString(fmt); //2011-01-02 03:04:56 789
TextBox1.Text = string.Concat(s1, s2, s3, s4, s5);
}속성 테스트:
protected void Button1_Click(object sender, EventArgs e)
{
DateTime dt = new DateTime(2011, 1, 2, 3, 4, 56, 789);
TextBox1.Text = string.Format("{0}
{1}
{2}
{3}
{4}
{5}
{6}
{7}
{8}
{9}
{10}
{11}
{12}",
dt.Date, //2011/1/2 0:00:00
dt.Day, //2
dt.DayOfWeek, //Sunday
dt.DayOfYear, //2
dt.Hour, //3
dt.Kind, //Unspecified
dt.Millisecond, //789
dt.Minute, //4
dt.Month, //1
dt.Second, //56
dt.Ticks, //634295342967890000
dt.TimeOfDay, //03:04:56.7890000
dt.Year //2011
);
}AddDays():
protected void Button1_Click(object sender, EventArgs e)
{
DateTime dt = new DateTime(2011, 1, 2); //2011/1/2
DateTime dt1 = dt.AddDays(1); //2011/1/3
DateTime dt2 = dt.AddDays(-2); //2010/12/31
TextBox1.Text = string.Format("{0:d}
{1:d}
{2:d}", dt, dt1, dt2);
}DateTime.Parse():
protected void Button1_Click(object sender, EventArgs e)
{
DateTime dt1 = DateTime.Parse("2011/1/2"); //2011/1/2 0:00:00
DateTime dt2 = DateTime.Parse("2011 1 2 3 4 56 "); //2011/1/2 3:04:56
TextBox1.Text = string.Concat(dt1, "
", dt2);
}변환 및 재구성:
protected void Button1_Click(object sender, EventArgs e)
{
DateTime dt = new DateTime(2011, 1, 2, 3, 4, 56, 789); //2011/1/2 3:04:56
long binaryTime = dt.ToBinary(); //634295342967890000
long fileTime = dt.ToFileTime(); //129383822967890000
long fileUtcTime = dt.ToFileTimeUtc(); //129384110967890000
double oleTime = dt.ToOADate(); //40545.1284350579
DateTime dt1 = DateTime.FromBinary(binaryTime); //2011/1/2 3:04:56
DateTime dt2 = DateTime.FromFileTime(fileTime); //2011/1/2 3:04:56
DateTime dt3 = DateTime.FromFileTimeUtc(fileUtcTime); //2011/1/2 3:04:56
DateTime dt4 = DateTime.FromOADate(oleTime); //2011/1/2 3:04:56
TextBox1.Text = string.Format("{0}
{1}
{2}
{3}
{4}
{5}
{6}
{7}
{8}",
dt,
binaryTime, fileTime, fileUtcTime, oleTime,
dt1, dt2, dt2, dt4
);
}DateTime.DaysInMonth():
protected void Button1_Click(object sender, EventArgs e)
{
int nDay;
string str = "";
for (int i=1; i<=12; i++)
{
nDay = DateTime.DaysInMonth(2011, i);
str += string.Format("2011 {0,2} : {1}
", i, nDay);
}
TextBox1.Text = str;
}
/*********************
2011 1 : 31
2011 2 : 28
2011 3 : 31
2011 4 : 30
2011 5 : 31
2011 6 : 30
2011 7 : 31
2011 8 : 31
2011 9 : 30
2011 10 : 31
2011 11 : 30
2011 12 : 31
**********************/ToString():
protected void Button1_Click(object sender, EventArgs e)
{
DateTime dt = new DateTime(2011, 1, 2, 3, 4, 56, 789);
string[] arr = new string[60];
arr[0] = dt.ToString(); //2011/1/2 3:04:56
arr[1] = dt.ToString("d"); //2011/1/2
arr[2] = dt.ToString("D"); //2011 1 2
arr[3] = dt.ToString("f"); //2011 1 2 3:04
arr[4] = dt.ToString("F"); //2011 1 2 3:04:56
arr[5] = dt.ToString("g"); //2011/1/2 3:04
arr[6] = dt.ToString("G"); //2011/1/2 3:04:56
arr[7] = dt.ToString("m"); //1 2
arr[8] = dt.ToString("o"); //2011-01-02T03:04:56.7890000
arr[9] = dt.ToString("r"); //Sun, 02 Jan 2011 03:04:56 GMT
arr[10] = dt.ToString("s"); //2011-01-02T03:04:56
arr[11] = dt.ToString("t"); //3:04
arr[12] = dt.ToString("T"); //3:04:56
arr[13] = dt.ToString("u"); //2011-01-02 03:04:56Z
arr[14] = dt.ToString("U"); //2011 1 1 19:04:56
arr[15] = dt.ToString("y"); //2011 1
arr[16] = dt.ToString("d"); //2011/1/2
arr[17] = dt.ToString("dd"); //02
arr[18] = dt.ToString("ddd"); //
arr[19] = dt.ToString("dddd"); //
arr[20] = dt.ToString("f"); //2011 1 2 3:04
arr[21] = dt.ToString("ff"); //78
arr[22] = dt.ToString("fff"); //789
arr[23] = dt.ToString("ffff"); //7890
arr[24] = dt.ToString("fffff"); //78900
arr[25] = dt.ToString("ffffff"); //789000
arr[26] = dt.ToString("fffffff"); //7890000
arr[27] = dt.ToString("F"); //2011 1 2 3:04:56
arr[28] = dt.ToString("FF"); //78
arr[29] = dt.ToString("FFF"); //789
arr[30] = dt.ToString("FFFF"); //789
arr[31] = dt.ToString("FFFFF"); //789
arr[32] = dt.ToString("FFFFFF"); //789
arr[33] = dt.ToString("FFFFFFF"); //789
arr[34] = dt.ToString("g"); //2011/1/2 3:04
arr[35] = dt.ToString("%h"); //3
arr[36] = dt.ToString("hh"); //03
arr[37] = dt.ToString("%H"); //3
arr[38] = dt.ToString("HH"); //03
arr[39] = dt.ToString("%K");
arr[40] = dt.ToString("m"); //1 2
arr[41] = dt.ToString("mm"); //04
arr[42] = dt.ToString("M"); //1 2
arr[43] = dt.ToString("MM"); //01
arr[44] = dt.ToString("MMM"); //
arr[45] = dt.ToString("MMMM"); //
arr[46] = dt.ToString("s"); //2011-01-02T03:04:56
arr[47] = dt.ToString("ss"); //56
arr[48] = dt.ToString("t"); //3:04
arr[49] = dt.ToString("tt"); //
arr[50] = dt.ToString("y"); //2011 1
arr[51] = dt.ToString("yy"); //11
arr[52] = dt.ToString("yyy"); //2011
arr[53] = dt.ToString("yyyy"); //2011
arr[54] = dt.ToString("yyyyy"); //02011
arr[55] = dt.ToString("%z"); //+8
arr[56] = dt.ToString("zz"); //+08
arr[57] = dt.ToString("zzz"); //+08:00
arr[58] = dt.ToString("yyyy MM dd HH mm ss "); //2011 01 02 03 04 56
arr[59] = dt.ToString("yyyy/M/d H:m:s"); //2011/1/2 3:4:56
string str = "";
foreach (string s in arr) { str += s + "
"; }
TextBox1.Text = str;
}GetDateTimeFormats():
protected void Button1_Click(object sender, EventArgs e)
{
DateTime dt = new DateTime(2011, 1, 2, 3, 4, 56, 789);
string[] sArr1 = dt.GetDateTimeFormats();
string[] sArr2 = dt.GetDateTimeFormats(new System.Globalization.CultureInfo("en-US"));
TextBox1.Text = string.Join("
", sArr1);
TextBox1.Text += "
" + new string('=', 32) + "
";
TextBox1.Text += string.Join("
", sArr2);
}
/* :
2011/1/2
2011-1-2
2011.1.2
2011-01-02
2011/01/02
2011.01.02
11-1-2
11/1/2
11.1.2
11/01/02
2011 1 2
2011 1 2 ,
,2011 1 2
2011 1 2 3:04
2011 1 2 03:04
2011 1 2 3:04
2011 1 2 03:04
2011 1 2 , 3:04
2011 1 2 , 03:04
2011 1 2 , 3:04
2011 1 2 , 03:04
,2011 1 2 3:04
,2011 1 2 03:04
,2011 1 2 3:04
,2011 1 2 03:04
2011 1 2 3:04:56
2011 1 2 03:04:56
2011 1 2 3:04:56
2011 1 2 03:04:56
2011 1 2 , 3:04:56
2011 1 2 , 03:04:56
2011 1 2 , 3:04:56
2011 1 2 , 03:04:56
,2011 1 2 3:04:56
,2011 1 2 03:04:56
,2011 1 2 3:04:56
,2011 1 2 03:04:56
2011/1/2 3:04
2011/1/2 03:04
2011/1/2 3:04
2011/1/2 03:04
2011-1-2 3:04
2011-1-2 03:04
2011-1-2 3:04
2011-1-2 03:04
2011.1.2 3:04
2011.1.2 03:04
2011.1.2 3:04
2011.1.2 03:04
2011-01-02 3:04
2011-01-02 03:04
2011-01-02 3:04
2011-01-02 03:04
2011/01/02 3:04
2011/01/02 03:04
2011/01/02 3:04
2011/01/02 03:04
2011.01.02 3:04
2011.01.02 03:04
2011.01.02 3:04
2011.01.02 03:04
11-1-2 3:04
11-1-2 03:04
11-1-2 3:04
11-1-2 03:04
11/1/2 3:04
11/1/2 03:04
11/1/2 3:04
11/1/2 03:04
11.1.2 3:04
11.1.2 03:04
11.1.2 3:04
11.1.2 03:04
11/01/02 3:04
11/01/02 03:04
11/01/02 3:04
11/01/02 03:04
2011/1/2 3:04:56
2011/1/2 03:04:56
2011/1/2 3:04:56
2011/1/2 03:04:56
2011-1-2 3:04:56
2011-1-2 03:04:56
2011-1-2 3:04:56
2011-1-2 03:04:56
2011.1.2 3:04:56
2011.1.2 03:04:56
2011.1.2 3:04:56
2011.1.2 03:04:56
2011-01-02 3:04:56
2011-01-02 03:04:56
2011-01-02 3:04:56
2011-01-02 03:04:56
2011/01/02 3:04:56
2011/01/02 03:04:56
2011/01/02 3:04:56
2011/01/02 03:04:56
2011.01.02 3:04:56
2011.01.02 03:04:56
2011.01.02 3:04:56
2011.01.02 03:04:56
11-1-2 3:04:56
11-1-2 03:04:56
11-1-2 3:04:56
11-1-2 03:04:56
11/1/2 3:04:56
11/1/2 03:04:56
11/1/2 3:04:56
11/1/2 03:04:56
11.1.2 3:04:56
11.1.2 03:04:56
11.1.2 3:04:56
11.1.2 03:04:56
11/01/02 3:04:56
11/01/02 03:04:56
11/01/02 3:04:56
11/01/02 03:04:56
1 2
1 2
2011-01-02T03:04:56.7890000
2011-01-02T03:04:56.7890000
Sun, 02 Jan 2011 03:04:56 GMT
Sun, 02 Jan 2011 03:04:56 GMT
2011-01-02T03:04:56
3:04
03:04
3:04
03:04
3:04:56
03:04:56
3:04:56
03:04:56
2011-01-02 03:04:56Z
2011 1 1 19:04:56
2011 1 1 19:04:56
2011 1 1 7:04:56
2011 1 1 07:04:56
2011 1 1 , 19:04:56
2011 1 1 , 19:04:56
2011 1 1 , 7:04:56
2011 1 1 , 07:04:56
,2011 1 1 19:04:56
,2011 1 1 19:04:56
,2011 1 1 7:04:56
,2011 1 1 07:04:56
2011 1
2011.1
2011 1
2011.1
================================
1/2/2011
1/2/11
01/02/11
01/02/2011
11/01/02
2011-01-02
02-Jan-11
Sunday, January 02, 2011
January 02, 2011
Sunday, 02 January, 2011
02 January, 2011
Sunday, January 02, 2011 3:04 AM
Sunday, January 02, 2011 03:04 AM
Sunday, January 02, 2011 3:04
Sunday, January 02, 2011 03:04
January 02, 2011 3:04 AM
January 02, 2011 03:04 AM
January 02, 2011 3:04
January 02, 2011 03:04
Sunday, 02 January, 2011 3:04 AM
Sunday, 02 January, 2011 03:04 AM
Sunday, 02 January, 2011 3:04
Sunday, 02 January, 2011 03:04
02 January, 2011 3:04 AM
02 January, 2011 03:04 AM
02 January, 2011 3:04
02 January, 2011 03:04
Sunday, January 02, 2011 3:04:56 AM
Sunday, January 02, 2011 03:04:56 AM
Sunday, January 02, 2011 3:04:56
Sunday, January 02, 2011 03:04:56
January 02, 2011 3:04:56 AM
January 02, 2011 03:04:56 AM
January 02, 2011 3:04:56
January 02, 2011 03:04:56
Sunday, 02 January, 2011 3:04:56 AM
Sunday, 02 January, 2011 03:04:56 AM
Sunday, 02 January, 2011 3:04:56
Sunday, 02 January, 2011 03:04:56
02 January, 2011 3:04:56 AM
02 January, 2011 03:04:56 AM
02 January, 2011 3:04:56
02 January, 2011 03:04:56
1/2/2011 3:04 AM
1/2/2011 03:04 AM
1/2/2011 3:04
1/2/2011 03:04
1/2/11 3:04 AM
1/2/11 03:04 AM
1/2/11 3:04
1/2/11 03:04
01/02/11 3:04 AM
01/02/11 03:04 AM
01/02/11 3:04
01/02/11 03:04
01/02/2011 3:04 AM
01/02/2011 03:04 AM
01/02/2011 3:04
01/02/2011 03:04
11/01/02 3:04 AM
11/01/02 03:04 AM
11/01/02 3:04
11/01/02 03:04
2011-01-02 3:04 AM
2011-01-02 03:04 AM
2011-01-02 3:04
2011-01-02 03:04
02-Jan-11 3:04 AM
02-Jan-11 03:04 AM
02-Jan-11 3:04
02-Jan-11 03:04
1/2/2011 3:04:56 AM
1/2/2011 03:04:56 AM
1/2/2011 3:04:56
1/2/2011 03:04:56
1/2/11 3:04:56 AM
1/2/11 03:04:56 AM
1/2/11 3:04:56
1/2/11 03:04:56
01/02/11 3:04:56 AM
01/02/11 03:04:56 AM
01/02/11 3:04:56
01/02/11 03:04:56
01/02/2011 3:04:56 AM
01/02/2011 03:04:56 AM
01/02/2011 3:04:56
01/02/2011 03:04:56
11/01/02 3:04:56 AM
11/01/02 03:04:56 AM
11/01/02 3:04:56
11/01/02 03:04:56
2011-01-02 3:04:56 AM
2011-01-02 03:04:56 AM
2011-01-02 3:04:56
2011-01-02 03:04:56
02-Jan-11 3:04:56 AM
02-Jan-11 03:04:56 AM
02-Jan-11 3:04:56
02-Jan-11 03:04:56
January 02
January 02
2011-01-02T03:04:56.7890000
2011-01-02T03:04:56.7890000
Sun, 02 Jan 2011 03:04:56 GMT
Sun, 02 Jan 2011 03:04:56 GMT
2011-01-02T03:04:56
3:04 AM
03:04 AM
3:04
03:04
3:04:56 AM
03:04:56 AM
3:04:56
03:04:56
2011-01-02 03:04:56Z
Saturday, January 01, 2011 7:04:56 PM
Saturday, January 01, 2011 07:04:56 PM
Saturday, January 01, 2011 19:04:56
Saturday, January 01, 2011 19:04:56
January 01, 2011 7:04:56 PM
January 01, 2011 07:04:56 PM
January 01, 2011 19:04:56
January 01, 2011 19:04:56
Saturday, 01 January, 2011 7:04:56 PM
Saturday, 01 January, 2011 07:04:56 PM
Saturday, 01 January, 2011 19:04:56
Saturday, 01 January, 2011 19:04:56
01 January, 2011 7:04:56 PM
01 January, 2011 07:04:56 PM
01 January, 2011 19:04:56
01 January, 2011 19:04:56
January, 2011
January, 2011
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