Csharp/C Sharp/Development Class/Date Time Format
Содержание
- 1 Compare the results of choosing InvariantInfo with those of choosing CurrentInfo:
- 2 DateTime ToString with CultureInfo
- 3 demonstrates culture formatting
- 4 Format time and date information 1
- 5 Format time and date information 2
- 6 Request a specific culture (english language in Great Britain):
- 7 The next example formats a DateTime with invariant culture. Invariant culture is always the same, regardless of the computer"s settings:
- 8 use the FromFileTime() method to convert an operating system file timestamp to a DateTime
- 9 use the ToFileTime() method to convert a DateTime to an operating system file timestamp
- 10 use the ToLongTimeString() and ToShortTimeString() methods to convert the time parts of a DateTime to long and short time strings
- 11 use the ToString() method to convert a DateTime to a string
Compare the results of choosing InvariantInfo with those of choosing CurrentInfo:
<source lang="csharp">
using System; using System.Globalization; public class MainClass {
public static void Main() { DateTime dt = new DateTime(); DateTimeFormatInfo dtfi; Console.Write("[I]nvariant or [C]urrent Info?: "); if (Console.Read() == "I") dtfi = DateTimeFormatInfo.InvariantInfo; else dtfi = DateTimeFormatInfo.CurrentInfo; dtfi = DateTimeFormatInfo.InvariantInfo; Console.WriteLine(dt.ToString("D", dtfi)); Console.WriteLine(dt.ToString("f", dtfi)); Console.WriteLine(dt.ToString("F", dtfi)); Console.WriteLine(dt.ToString("g", dtfi)); Console.WriteLine(dt.ToString("G", dtfi)); Console.WriteLine(dt.ToString("m", dtfi)); Console.WriteLine(dt.ToString("r", dtfi)); Console.WriteLine(dt.ToString("s", dtfi)); Console.WriteLine(dt.ToString("t", dtfi)); Console.WriteLine(dt.ToString("T", dtfi)); Console.WriteLine(dt.ToString("u", dtfi)); Console.WriteLine(dt.ToString("U", dtfi)); Console.WriteLine(dt.ToString("d", dtfi)); Console.WriteLine(dt.ToString("y", dtfi)); Console.WriteLine(dt.ToString("dd-MMM-yy", dtfi)); }
}
</source>
DateTime ToString with CultureInfo
<source lang="csharp"> using System; using System.Globalization; using System.Threading; class Program {
static void Main(string[] args) { DateTime d = new DateTime(2005, 08, 09); Console.WriteLine(d.ToLongDateString()); Console.WriteLine(d.ToString("D", new CultureInfo("fr-FR"))); CultureInfo ci = Thread.CurrentThread.CurrentCulture; Console.WriteLine(ci.ToString() + ": " + d.ToString("D")); ci = new CultureInfo("es-ES"); Thread.CurrentThread.CurrentCulture = ci; Console.WriteLine(ci.ToString() + ": " + d.ToString("D")); }
}
</source>
demonstrates culture formatting
<source lang="csharp"> /* Mastering Visual C# .NET by Jason Price, Mike Gunderloy Publisher: Sybex; ISBN: 0782129110
- /
/*
Example21_10.cs demonstrates culture formatting
- /
using System; using System.Globalization; public class Example21_10 {
public static void Main() { // create a date and a currency value DateTime dtNow = DateTime.Now; Double curOriginal = 12345.67; // and format the variables for a specific culture CultureInfo ci = new CultureInfo("en-US"); string sLocalizedDate = dtNow.ToString("d", ci); string sLocalizedCur = curOriginal.ToString("c", ci); // print them out Console.WriteLine(sLocalizedDate); Console.WriteLine(sLocalizedCur); // and format them for a second culture CultureInfo ci2 = new CultureInfo("en-GB"); string sLocalizedDate2 = dtNow.ToString("d", ci2); string sLocalizedCur2 = curOriginal.ToString("c", ci2); // print them out again Console.WriteLine(sLocalizedDate2); Console.WriteLine(sLocalizedCur2); }
}
</source>
Format time and date information 1
<source lang="csharp"> /* C#: The Complete Reference by Herbert Schildt Publisher: Osborne/McGraw-Hill (March 8, 2002) ISBN: 0072134852
- /
// Format time and date information.
using System;
public class CustomTimeAndDateFormatsDemo {
public static void Main() { DateTime dt = DateTime.Now; Console.WriteLine("Time is {0:hh:mm tt}", dt); Console.WriteLine("24 hour time is {0:hh:mm}", dt); Console.WriteLine("Date is {0:ddd MMM dd, yyyy}", dt); Console.WriteLine("Era: {0:gg}", dt); Console.WriteLine("Time with seconds: " + "{0:HH:mm:ss tt}", dt); Console.WriteLine("Use m for day of month: {0:m}", dt); Console.WriteLine("use m for minutes: {0:%m}", dt); }
}
</source>
Format time and date information 2
<source lang="csharp"> /* C#: The Complete Reference by Herbert Schildt Publisher: Osborne/McGraw-Hill (March 8, 2002) ISBN: 0072134852
- /
// Format time and date information.
using System;
public class TimeAndDateFormatDemo {
public static void Main() { DateTime dt = DateTime.Now; // obtain current time Console.WriteLine("d format: {0:d}", dt); Console.WriteLine("D format: {0:D}", dt); Console.WriteLine("t format: {0:t}", dt); Console.WriteLine("T format: {0:T}", dt); Console.WriteLine("f format: {0:f}", dt); Console.WriteLine("F format: {0:F}", dt); Console.WriteLine("g format: {0:g}", dt); Console.WriteLine("G format: {0:G}", dt); Console.WriteLine("m format: {0:m}", dt); Console.WriteLine("M format: {0:M}", dt); Console.WriteLine("r format: {0:r}", dt); Console.WriteLine("R format: {0:R}", dt); Console.WriteLine("s format: {0:s}", dt); Console.WriteLine("u format: {0:u}", dt); Console.WriteLine("U format: {0:U}", dt); Console.WriteLine("y format: {0:y}", dt); Console.WriteLine("Y format: {0:Y}", dt); }
}
</source>
Request a specific culture (english language in Great Britain):
<source lang="csharp"> using System; using System.Globalization; public class MainClass {
public static void Main() { CultureInfo uk = CultureInfo.GetCultureInfo("en-GB"); Console.WriteLine(3.ToString("C", uk)); // ?¡ê3.00 }
}
</source>
The next example formats a DateTime with invariant culture. Invariant culture is always the same, regardless of the computer"s settings:
<source lang="csharp"> using System; using System.Globalization; public class MainClass {
public static void Main() { DateTime dt = new DateTime(2000, 1, 2); CultureInfo iv = CultureInfo.InvariantCulture; Console.WriteLine(dt.ToString(iv)); // 01/02/2000 00:00:00 Console.WriteLine(dt.ToString("d", iv)); // 01/02/2000 }
}
</source>
use the FromFileTime() method to convert an operating system file timestamp to a DateTime
<source lang="csharp">
using System; class MainClass {
public static void Main() { DateTime myDateTime10 = new DateTime(2004, 1, 15, 23, 2, 5); long myFileTime = myDateTime10.ToFileTime(); DateTime myDateTime11 = DateTime.FromFileTime(myFileTime); Console.WriteLine("DateTime.FromFileTime() = " + myDateTime11); }
}
</source>
use the ToFileTime() method to convert a DateTime to an operating system file timestamp
<source lang="csharp"> using System; class MainClass {
public static void Main() { DateTime myDateTime10 = new DateTime(2004, 1, 15, 23, 2, 5); long myFileTime = myDateTime10.ToFileTime(); Console.WriteLine("myDateTime10.ToFileTime() = " + myDateTime10.ToFileTime()); }
}
</source>
use the ToLongTimeString() and ToShortTimeString() methods to convert the time parts of a DateTime to long and short time strings
<source lang="csharp">
using System; class MainClass {
public static void Main() { DateTime myDateTime10 = new DateTime(2004, 1, 15, 23, 2, 5); long myFileTime = myDateTime10.ToFileTime(); DateTime myDateTime11 = DateTime.FromFileTime(myFileTime); Console.WriteLine("myDateTime11.ToLongTimeString() = " + myDateTime11.ToLongTimeString()); Console.WriteLine("myDateTime11.ToShortTimeString() = " + myDateTime11.ToShortTimeString()); }
}
</source>
use the ToString() method to convert a DateTime to a string
<source lang="csharp">
using System; class MainClass {
public static void Main() { DateTime myDateTime12 = new DateTime(2004, 1, 12, 22, 2, 10); Console.WriteLine("myDateTime12.ToString() = " + myDateTime12.ToString()); Console.WriteLine("myDateTime12.ToString(\"MMMM dd, yyyy\") = " +myDateTime12.ToString("MMMM dd, yyyy")); Console.WriteLine("myDateTime12.ToString(\"d\") = " + myDateTime12.ToString("d")); Console.WriteLine("myDateTime12.ToString(\"D\") = " + myDateTime12.ToString("D")); Console.WriteLine("myDateTime12.ToString(\"f\") = " + myDateTime12.ToString("f")); Console.WriteLine("myDateTime12.ToString(\"F\") = " + myDateTime12.ToString("F")); Console.WriteLine("myDateTime12.ToString(\"g\") = " + myDateTime12.ToString("g")); Console.WriteLine("myDateTime12.ToString(\"G\") = " + myDateTime12.ToString("G")); Console.WriteLine("myDateTime12.ToString(\"m\") = " + myDateTime12.ToString("m")); Console.WriteLine("myDateTime12.ToString(\"r\") = " + myDateTime12.ToString("r")); Console.WriteLine("myDateTime12.ToString(\"s\") = " + myDateTime12.ToString("s")); Console.WriteLine("myDateTime12.ToString(\"t\") = " + myDateTime12.ToString("t")); Console.WriteLine("myDateTime12.ToString(\"T\") = " + myDateTime12.ToString("T")); Console.WriteLine("myDateTime12.ToString(\"u\") = " + myDateTime12.ToString("u")); Console.WriteLine("myDateTime12.ToString(\"U\") = " + myDateTime12.ToString("U")); Console.WriteLine("myDateTime12.ToString(\"y\") = " + myDateTime12.ToString("y")); }
}
</source>