本文整理汇总了C#中System.DateTime结构体的典型用法代码示例。如果您正苦于以下问题：C# DateTime结构体的具体用法？C# DateTime怎么用？C# DateTime使用的例子？那么恭喜您, 这里精选的结构体代码示例或许可以为您提供帮助。
DateTime结构体属于System命名空间，在下文中一共展示了DateTime结构体的15个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C#代码示例。
示例1:
DateTime date1 = DateTime.Now;
DateTime date2 = DateTime.UtcNow;
DateTime date3 = DateTime.Today;示例2:
var dateString = "5/1/2008 8:30:52 AM";
DateTime date1 = DateTime.Parse(dateString,
System.Globalization.CultureInfo.InvariantCulture);
var iso8601String = "20080501T08:30:52Z";
DateTime dateISO8602 = DateTime.ParseExact(iso8601String, "yyyyMMddTHH:mm:ssZ",
System.Globalization.CultureInfo.InvariantCulture);示例3: DateTime
var date1 = new DateTime(2008, 3, 1, 7, 0, 0);
Console.WriteLine(date1.ToString());
// For en-US culture, displays 3/1/2008 7:00:00 AM示例4: DateTime
var date1 = new DateTime(2008, 3, 1, 7, 0, 0);
Console.WriteLine(date1.ToString("F"));
// Displays Saturday, March 01, 2008 7:00:00 AM示例5: foreach
string[] formats = { "yyyyMMdd", "HHmmss" };
string[] dateStrings = { "20130816", "20131608", " 20130816 ",
"115216", "521116", " 115216 " };
DateTime parsedDate;
foreach (var dateString in dateStrings)
{
if (DateTime.TryParseExact(dateString, formats, null,
System.Globalization.DateTimeStyles.AllowWhiteSpaces |
System.Globalization.DateTimeStyles.AdjustToUniversal,
out parsedDate))
Console.WriteLine($"{dateString} --> {parsedDate:g}");
else
Console.WriteLine($"Cannot convert {dateString}");
}输出：
20130816 --> 8/16/2013 12:00 AM Cannot convert 20131608 20130816 --> 8/16/2013 12:00 AM 115216 --> 4/22/2013 11:52 AM Cannot convert 521116 115216 --> 4/22/2013 11:52 AM
示例6: DateTime
var thTH = new System.Globalization.CultureInfo("th-TH");
var value = new DateTime(2016, 5, 28);
Console.WriteLine(value.ToString(thTH));
thTH.DateTimeFormat.Calendar = new System.Globalization.GregorianCalendar();
Console.WriteLine(value.ToString(thTH));输出：
28/5/2559 0:00:00 28/5/2016 0:00:00
示例7:
var thTH = new System.Globalization.CultureInfo("th-TH");
var value = DateTime.Parse("28/05/2559", thTH);
Console.WriteLine(value.ToString(thTH));
thTH.DateTimeFormat.Calendar = new System.Globalization.GregorianCalendar();
Console.WriteLine(value.ToString(thTH));输出：
28/5/2559 0:00:00 28/5/2016 0:00:00
示例8: DateTime
var thTH = new System.Globalization.CultureInfo("th-TH");
var dat = new DateTime(2559, 5, 28, thTH.DateTimeFormat.Calendar);
Console.WriteLine($"Thai Buddhist era date: {dat.ToString("d", thTH)}");
Console.WriteLine($"Gregorian date: {dat:d}");输出：
Thai Buddhist Era Date: 28/5/2559 Gregorian Date: 28/05/2016
示例9: DateTime
var thTH = new System.Globalization.CultureInfo("th-TH");
var cal = thTH.DateTimeFormat.Calendar;
var dat = new DateTime(2559, 5, 28, cal);
Console.WriteLine("Using the Thai Buddhist Era calendar:");
Console.WriteLine($"Date: {dat.ToString("d", thTH)}");
Console.WriteLine($"Year: {cal.GetYear(dat)}");
Console.WriteLine($"Leap year: {cal.IsLeapYear(cal.GetYear(dat))}\n");
Console.WriteLine("Using the Gregorian calendar:");
Console.WriteLine($"Date: {dat:d}");
Console.WriteLine($"Year: {dat.Year}");
Console.WriteLine($"Leap year: {DateTime.IsLeapYear(dat.Year)}");输出：
Using the Thai Buddhist Era calendar Date : 28/5/2559 Year: 2559 Leap year : True Using the Gregorian calendar Date : 28/05/2016 Year: 2016 Leap year : True
示例10: DateTime
var thTH = new System.Globalization.CultureInfo("th-TH");
var thCalendar = thTH.DateTimeFormat.Calendar;
var dat = new DateTime(1395, 8, 18, thCalendar);
Console.WriteLine("Using the Thai Buddhist Era calendar:");
Console.WriteLine($"Date: {dat.ToString("d", thTH)}");
Console.WriteLine($"Day of Week: {thCalendar.GetDayOfWeek(dat)}");
Console.WriteLine($"Week of year: {thCalendar.GetWeekOfYear(dat, System.Globalization.CalendarWeekRule.FirstDay, DayOfWeek.Sunday)}\n");
var greg = new System.Globalization.GregorianCalendar();
Console.WriteLine("Using the Gregorian calendar:");
Console.WriteLine($"Date: {dat:d}");
Console.WriteLine($"Day of Week: {dat.DayOfWeek}");
Console.WriteLine($"Week of year: {greg.GetWeekOfYear(dat, System.Globalization.CalendarWeekRule.FirstDay,DayOfWeek.Sunday)}");输出：
Using the Thai Buddhist Era calendar Date : 18/8/1395 Day of Week: Sunday Week of year: 34 Using the Gregorian calendar Date : 18/08/0852 Day of Week: Sunday Week of year: 34
示例11: PersistAsLocalStrings
public static void PersistAsLocalStrings()
{
SaveLocalDatesAsString();
RestoreLocalDatesFromString();
}
private static void SaveLocalDatesAsString()
{
DateTime[] dates = { new DateTime(2014, 6, 14, 6, 32, 0),
new DateTime(2014, 7, 10, 23, 49, 0),
new DateTime(2015, 1, 10, 1, 16, 0),
new DateTime(2014, 12, 20, 21, 45, 0),
new DateTime(2014, 6, 2, 15, 14, 0) };
string output = null;
Console.WriteLine($"Current Time Zone: {TimeZoneInfo.Local.DisplayName}");
Console.WriteLine($"The dates on an {Thread.CurrentThread.CurrentCulture.Name} system:");
for (int ctr = 0; ctr < dates.Length; ctr++)
{
Console.WriteLine(dates[ctr].ToString("f"));
output += dates[ctr].ToString() + (ctr != dates.Length - 1 ? "|" : "");
}
var sw = new StreamWriter(filenameTxt);
sw.Write(output);
sw.Close();
Console.WriteLine("Saved dates...");
}
private static void RestoreLocalDatesFromString()
{
TimeZoneInfo.ClearCachedData();
Console.WriteLine($"Current Time Zone: {TimeZoneInfo.Local.DisplayName}");
Thread.CurrentThread.CurrentCulture = CultureInfo.CreateSpecificCulture("en-GB");
StreamReader sr = new StreamReader(filenameTxt);
string[] inputValues = sr.ReadToEnd().Split(new char[] { '|' },
StringSplitOptions.RemoveEmptyEntries);
sr.Close();
Console.WriteLine("The dates on an {0} system:",
Thread.CurrentThread.CurrentCulture.Name);
foreach (var inputValue in inputValues)
{
DateTime dateValue;
if (DateTime.TryParse(inputValue, out dateValue))
{
Console.WriteLine($"'{inputValue}' --> {dateValue:f}");
}
else
{
Console.WriteLine("Cannot parse '{inputValue}'");
}
}
Console.WriteLine("Restored dates...");
}输出：
Current Time Zone: (UTC-08:00) Pacific Time (US & Canada) The dates on an en-US system: Saturday, June 14, 2014 6:32 AM Thursday, July 10, 2014 11:49 PM Saturday, January 10, 2015 1:16 AM Saturday, December 20, 2014 9:45 PM Monday, June 02, 2014 3:14 PM Saved dates... When restored on an en-GB system, the example displays the following output: Current Time Zone: (UTC) Dublin, Edinburgh, Lisbon, London The dates on an en-GB system: Cannot parse //6/14/2014 6:32:00 AM// 7/10/2014 11:49:00 PM// --> 07 October 2014 23:49 1/10/2015 1:16:00 AM// --> 01 October 2015 01:16 Cannot parse //12/20/2014 9:45:00 PM// 6/2/2014 3:14:00 PM// --> 06 February 2014 15:14 Restored dates...
示例12: PersistAsInvariantStrings
public static void PersistAsInvariantStrings()
{
SaveDatesAsInvariantStrings();
RestoreDatesAsInvariantStrings();
}
private static void SaveDatesAsInvariantStrings()
{
DateTime[] dates = { new DateTime(2014, 6, 14, 6, 32, 0),
new DateTime(2014, 7, 10, 23, 49, 0),
new DateTime(2015, 1, 10, 1, 16, 0),
new DateTime(2014, 12, 20, 21, 45, 0),
new DateTime(2014, 6, 2, 15, 14, 0) };
string output = null;
Console.WriteLine($"Current Time Zone: {TimeZoneInfo.Local.DisplayName}");
Console.WriteLine($"The dates on an {Thread.CurrentThread.CurrentCulture.Name} system:");
for (int ctr = 0; ctr < dates.Length; ctr++)
{
Console.WriteLine(dates[ctr].ToString("f"));
output += dates[ctr].ToUniversalTime().ToString("O", CultureInfo.InvariantCulture)
+ (ctr != dates.Length - 1 ? "|" : "");
}
var sw = new StreamWriter(filenameTxt);
sw.Write(output);
sw.Close();
Console.WriteLine("Saved dates...");
}
private static void RestoreDatesAsInvariantStrings()
{
TimeZoneInfo.ClearCachedData();
Console.WriteLine("Current Time Zone: {0}",
TimeZoneInfo.Local.DisplayName);
Thread.CurrentThread.CurrentCulture = CultureInfo.CreateSpecificCulture("en-GB");
StreamReader sr = new StreamReader(filenameTxt);
string[] inputValues = sr.ReadToEnd().Split(new char[] { '|' },
StringSplitOptions.RemoveEmptyEntries);
sr.Close();
Console.WriteLine("The dates on an {0} system:",
Thread.CurrentThread.CurrentCulture.Name);
foreach (var inputValue in inputValues)
{
DateTime dateValue;
if (DateTime.TryParseExact(inputValue, "O", CultureInfo.InvariantCulture,
DateTimeStyles.RoundtripKind, out dateValue))
{
Console.WriteLine($"'{inputValue}' --> {dateValue.ToLocalTime():f}");
}
else
{
Console.WriteLine("Cannot parse '{0}'", inputValue);
}
}
Console.WriteLine("Restored dates...");
}输出：
Current Time Zone: (UTC-08:00) Pacific Time (US & Canada) The dates on an en-US system: Saturday, June 14, 2014 6:32 AM Thursday, July 10, 2014 11:49 PM Saturday, January 10, 2015 1:16 AM Saturday, December 20, 2014 9:45 PM Monday, June 02, 2014 3:14 PM Saved dates... When restored on an en-GB system, the example displays the following output: Current Time Zone: (UTC) Dublin, Edinburgh, Lisbon, London The dates on an en-GB system: '2014-06-14T13:32:00.0000000Z' --> 14 June 2014 14:32 '2014-07-11T06:49:00.0000000Z' --> 11 July 2014 07:49 '2015-01-10T09:16:00.0000000Z' --> 10 January 2015 09:16 '2014-12-21T05:45:00.0000000Z' --> 21 December 2014 05:45 '2014-06-02T22:14:00.0000000Z' --> 02 June 2014 23:14 Restored dates...
示例13: PersistAsIntegers
public static void PersistAsIntegers()
{
SaveDatesAsInts();
RestoreDatesAsInts();
}
private static void SaveDatesAsInts()
{
DateTime[] dates = { new DateTime(2014, 6, 14, 6, 32, 0),
new DateTime(2014, 7, 10, 23, 49, 0),
new DateTime(2015, 1, 10, 1, 16, 0),
new DateTime(2014, 12, 20, 21, 45, 0),
new DateTime(2014, 6, 2, 15, 14, 0) };
Console.WriteLine($"Current Time Zone: {TimeZoneInfo.Local.DisplayName}");
Console.WriteLine($"The dates on an {Thread.CurrentThread.CurrentCulture.Name} system:");
var ticks = new long[dates.Length];
for (int ctr = 0; ctr < dates.Length; ctr++)
{
Console.WriteLine(dates[ctr].ToString("f"));
ticks[ctr] = dates[ctr].ToUniversalTime().Ticks;
}
var fs = new FileStream(filenameInts, FileMode.Create);
var bw = new BinaryWriter(fs);
bw.Write(ticks.Length);
foreach (var tick in ticks)
bw.Write(tick);
bw.Close();
Console.WriteLine("Saved dates...");
}
private static void RestoreDatesAsInts()
{
TimeZoneInfo.ClearCachedData();
Console.WriteLine($"Current Time Zone: {TimeZoneInfo.Local.DisplayName}");
Thread.CurrentThread.CurrentCulture = CultureInfo.CreateSpecificCulture("en-GB");
FileStream fs = new FileStream(filenameInts, FileMode.Open);
BinaryReader br = new BinaryReader(fs);
int items;
DateTime[] dates;
try
{
items = br.ReadInt32();
dates = new DateTime[items];
for (int ctr = 0; ctr < items; ctr++)
{
long ticks = br.ReadInt64();
dates[ctr] = new DateTime(ticks).ToLocalTime();
}
}
catch (EndOfStreamException)
{
Console.WriteLine("File corruption detected. Unable to restore data...");
return;
}
catch (IOException)
{
Console.WriteLine("Unspecified I/O error. Unable to restore data...");
return;
}
// Thrown during array initialization.
catch (OutOfMemoryException)
{
Console.WriteLine("File corruption detected. Unable to restore data...");
return;
}
finally
{
br.Close();
}
Console.WriteLine($"The dates on an {Thread.CurrentThread.CurrentCulture.Name} system:");
foreach (var value in dates)
Console.WriteLine(value.ToString("f"));
Console.WriteLine("Restored dates...");
}输出：
Current Time Zone: (UTC-08:00) Pacific Time (US & Canada) The dates on an en-US system: Saturday, June 14, 2014 6:32 AM Thursday, July 10, 2014 11:49 PM Saturday, January 10, 2015 1:16 AM Saturday, December 20, 2014 9:45 PM Monday, June 02, 2014 3:14 PM Saved dates... When restored on an en-GB system, the example displays the following output: Current Time Zone: (UTC) Dublin, Edinburgh, Lisbon, London The dates on an en-GB system: 14 June 2014 14:32 11 July 2014 07:49 10 January 2015 09:16 21 December 2014 05:45 02 June 2014 23:14 Restored dates...
示例14: PersistAsXML
public static void PersistAsXML()
{
// Serialize the data.
var leapYears = new List<DateTime>();
for (int year = 2000; year <= 2100; year += 4)
{
if (DateTime.IsLeapYear(year))
leapYears.Add(new DateTime(year, 2, 29));
}
DateTime[] dateArray = leapYears.ToArray();
var serializer = new XmlSerializer(dateArray.GetType());
TextWriter sw = new StreamWriter(filenameXml);
try
{
serializer.Serialize(sw, dateArray);
}
catch (InvalidOperationException e)
{
Console.WriteLine(e.InnerException.Message);
}
finally
{
if (sw != null) sw.Close();
}
// Deserialize the data.
DateTime[] deserializedDates;
using (var fs = new FileStream(filenameXml, FileMode.Open))
{
deserializedDates = (DateTime[])serializer.Deserialize(fs);
}
// Display the dates.
Console.WriteLine($"Leap year days from 2000-2100 on an {Thread.CurrentThread.CurrentCulture.Name} system:");
int nItems = 0;
foreach (var dat in deserializedDates)
{
Console.Write($" {dat:d} ");
nItems++;
if (nItems % 5 == 0)
Console.WriteLine();
}
}输出：
Leap year days from 2000-2100 on an en-GB system: 29/02/2000 29/02/2004 29/02/2008 29/02/2012 29/02/2016 29/02/2020 29/02/2024 29/02/2028 29/02/2032 29/02/2036 29/02/2040 29/02/2044 29/02/2048 29/02/2052 29/02/2056 29/02/2060 29/02/2064 29/02/2068 29/02/2072 29/02/2076 29/02/2080 29/02/2084 29/02/2088 29/02/2092 29/02/2096
示例15: PersistBinary
public static void PersistBinary()
{
SaveDatesBinary();
RestoreDatesBinary();
}
private static void SaveDatesBinary()
{
DateTime[] dates = { new DateTime(2014, 6, 14, 6, 32, 0),
new DateTime(2014, 7, 10, 23, 49, 0),
new DateTime(2015, 1, 10, 1, 16, 0),
new DateTime(2014, 12, 20, 21, 45, 0),
new DateTime(2014, 6, 2, 15, 14, 0) };
var fs = new FileStream(filenameBin, FileMode.Create);
var bin = new BinaryFormatter();
Console.WriteLine($"Current Time Zone: {TimeZoneInfo.Local.DisplayName}");
Console.WriteLine($"The dates on an {Thread.CurrentThread.CurrentCulture.Name} system:");
for (int ctr = 0; ctr < dates.Length; ctr++)
{
Console.WriteLine(dates[ctr].ToString("f"));
dates[ctr] = dates[ctr].ToUniversalTime();
}
bin.Serialize(fs, dates);
fs.Close();
Console.WriteLine("Saved dates...");
}
private static void RestoreDatesBinary()
{
TimeZoneInfo.ClearCachedData();
Console.WriteLine($"Current Time Zone: {TimeZoneInfo.Local.DisplayName}");
Thread.CurrentThread.CurrentCulture = CultureInfo.CreateSpecificCulture("en-GB");
FileStream fs = new FileStream(filenameBin, FileMode.Open);
BinaryFormatter bin = new BinaryFormatter();
var dates = (DateTime[])bin.Deserialize(fs);
fs.Close();
Console.WriteLine($"The dates on an {Thread.CurrentThread.CurrentCulture.Name} system:");
foreach (var value in dates)
Console.WriteLine(value.ToLocalTime().ToString("f"));
Console.WriteLine("Restored dates...");
}输出：
Current Time Zone: (UTC-08:00) Pacific Time (US & Canada) The dates on an en-US system: Saturday, June 14, 2014 6:32 AM Thursday, July 10, 2014 11:49 PM Saturday, January 10, 2015 1:16 AM Saturday, December 20, 2014 9:45 PM Monday, June 02, 2014 3:14 PM Saved dates... When restored on an en-GB system, the example displays the following output: Current Time Zone: (UTC-6:00) Central Time (US & Canada) The dates on an en-GB system: 14 June 2014 08:32 11 July 2014 01:49 10 January 2015 03:16 20 December 2014 23:45 02 June 2014 17:14 Restored dates...