C# String.Format DateTime Source Code Example
String.Format DateTime
Purpose: – Illustrates using String Format DateTime in C-Sharp.
Prerequistes:
- Install C# (Express or Standard Edition)
- Install SQL Server Express
- Download Northwind and Pubs Databases
- Attach Northwind Database to Databases in Sql Express
- Attach pubs Database to Databases in Sql Express
Notes:
- You can build your own library of syntax examples by using same project over and over and just adding new classes to it.
Instructions:
- Use C# 2008 (express or standard)
- Create new project;
- Click File/New Project
- Select Console Application Template
- Select C-Sharp for Language
- name of project could be CSharp_Syntax.
- Add New folder named “LanguageBasics”
- Right-click project name in solution explorer;
- add new folder;
- name of folder could be: LanguageBasics
- Add Class named clsStringFormatDateTime to LanguageBasics folder
- Right-click LanguageBasics folder;
- add new item;
- Select Class
- Class name could be clsStringFormatDateTime
- Click on copy code in code below to copy code into class clsStringFormatDateTime.cs
- Click on copy code in second set of code below to copy code into Program.cs
- Click on green arrow in toolbar in VS or press F5 to run program.
Step 1: Click on Copy Code to Cut-n-paste code into clsStringFormatDateTime.cs
using System; public class clsStringFormatDateTime { public void Main() { //************************************************** // Custom DateTime Formatting //************************************************** Console.WriteLine("Custom DateTime Formatting:"); //Here are custom format specifiers y (year), M (month), d (day), h (hour 12), H (hour 24), m (minute), s (second), // f (second fraction), F (second fraction, trailing zeroes are trimmed), t (P.M or A.M) and z (time zone). //Following examples show how the format specifiers can be used. // create date time 2009-12-21 20:04:08.101 DateTime dt = new DateTime(2009, 12, 20, 20, 4, 8, 101); // Ways to format year: "9 09 009 2009" year Console.WriteLine(string.Format("{0:y yy yyy yyyy}", dt)); // Ways to format month: "12 12 Dec December" month Console.WriteLine(string.Format("{0:M MM MMM MMMM}", dt)); // Ways to format day: "21 21 Sun Sunday" day Console.WriteLine(string.Format("{0:d dd ddd dddd}", dt)); // Ways to format hour: "8 08 20 20" hour 12/24 Console.WriteLine(string.Format("{0:h hh H HH}", dt)); // Ways to format minute: "4 04" minute Console.WriteLine(string.Format("{0:m mm}", dt)); // Ways to format second: ' "8 08" second Console.WriteLine(string.Format("{0:s ss}", dt)); // Ways to format fraction of second: "1 10 101 1010" sec.fraction Console.WriteLine(string.Format("{0:f ff fff ffff}", dt)); // Ways to format fraction of second: "1 1 101 101" without zeros Console.WriteLine(string.Format("{0:F FF FFF FFFF}", dt)); // How to display am or pm: "P PM" A.M. or P.M. Console.WriteLine(string.Format("{0:t tt}", dt)); // How to display timezone: "-6 -06 -06:00" time zone Console.WriteLine(string.Format("{0:z zz zzz}", dt)); //************************************************** // Using date separator / (slash) and time sepatator : (colon). //************************************************** Console.WriteLine("\n"); Console.WriteLine("Using date separator / (slash) and time sepatator : (colon):"); //These characters will be rewritten to characters defined //in the current DateTimeFormatInfo.DateSeparator and DateTimeFormatInfo.TimeSeparator. // "20/12/09 20:04:08" - english (en-US) Console.WriteLine(string.Format("{0:d/M/yyyy HH:mm:ss}", dt)); // "20.12.2009 20:04:08" - german (de-DE) // date separator in german culture is "." (so "/" changes to ".") Console.WriteLine(string.Format("{0:d/M/yyyy HH:mm:ss}", dt)); //************************************************** // Here are some examples of custom date and time formatting: //************************************************** Console.WriteLine("\n"); Console.WriteLine("Here are some examples of custom date and time formatting:"); // month/day numbers without/with leading zeroes // "12/20/2009" Console.WriteLine(string.Format("{0:M/d/yyyy}", dt)); // "12/20/2009" Console.WriteLine(string.Format("{0:MM/dd/yyyy}", dt)); // day/month names // "Sun, Dec 20, 2009" Console.WriteLine(string.Format("{0:ddd, MMM d, yyyy}", dt)); // "Sunday, December 20, 2009" // two/four digit year Console.WriteLine(string.Format("{0:dddd, MMMM d, yyyy}", dt)); // "12/20/09" Console.WriteLine(string.Format("{0:MM/dd/yy}", dt)); // "12/20/2009" Console.WriteLine(string.Format("{0:MM/dd/yyyy}", dt)); //************************************************** // Standard DateTime Formatting //************************************************** Console.WriteLine("\n"); Console.WriteLine("Standard DateTime Formatting:"); //In DateTimeFormatInfo there are defined standard patterns for the current culture. //For example, property ShortTimePattern is string that contains value h:mm tt for en-US culture //and value HH:mm for de-DE culture. //Following table shows patterns defined in DateTimeFormatInfo and their values for en-US culture. //First column contains format specifiers for the String.Format method. //Specifier DateTimeFormatInfo property Pattern value (for en-US culture) //t ShortTimePattern h:mm tt //d ShortDatePattern M/d/yyyy //T LongTimePattern h:mm:ss tt //D LongDatePattern dddd, MMMM dd, yyyy //f (combination of D and t) dddd, MMMM dd, yyyy h:mm tt //F FullDateTimePattern dddd, MMMM dd, yyyy h:mm:ss tt //g (combination of d and t) M/d/yyyy h:mm tt //G (combination of d and T) M/d/yyyy h:mm:ss tt //m, M MonthDayPattern MMMM dd //y, Y YearMonthPattern MMMM, yyyy //r, R RFC1123Pattern ddd, dd MMM yyyy HH':'mm':'ss 'GMT' (*) //s SortableDateTimePattern yyyy'-'MM'-'dd'T'HH':'mm':'ss (*) //u UniversalSortableDateTimePattern yyyy'-'MM'-'dd HH':'mm':'ss'Z' (*) // (*) = culture independent //Following examples show usage of standard format specifiers in String.Format method and the resulting output. // "8:04 PM" ShortTime Console.WriteLine(string.Format("{0:t}", dt)); // "12/20/2009" ShortDate Console.WriteLine(string.Format("{0:d}", dt)); // "8:04:08 PM" LongTime Console.WriteLine(string.Format("{0:T}", dt)); // "Sunday, December 20, 2009" LongDate Console.WriteLine(string.Format("{0:D}", dt)); // "Sunday, December 20, 2009 8:04 PM" LongDate+ShortTime Console.WriteLine(string.Format("{0:f}", dt)); // "Sunday, December 20, 2009 8:04:08 PM" FullDateTime Console.WriteLine(string.Format("{0:F}", dt)); // "12/20/2009 8:04 PM" ShortDate+ShortTime Console.WriteLine(string.Format("{0:g}", dt)); // "12/20/2009 8:04:08 PM" ShortDate+LongTime Console.WriteLine(string.Format("{0:G}", dt)); // "December 20" MonthDay Console.WriteLine(string.Format("{0:m}", dt)); // "December, 2009" YearMonth Console.WriteLine(string.Format("{0:y}", dt)); // "Sun, 20 Dec 2009 20:04:08 GMT" Console.WriteLine(string.Format("{0:r}", dt)); // "2009-12-20T20:04:08" SortableDateTime Console.WriteLine(string.Format("{0:s}", dt)); // "2009-12-20 20:04:08Z" UniversalSortableDateTime Console.WriteLine(string.Format("{0:u}", dt)); Console.ReadLine(); } } |
Step 2: Click on Copy Code to Cut-n-paste code into Program.cs
using System; using System.Collections.Generic; using System.Linq; using System.Text; namespace CSharp_Syntax { class Program { static void Main(string[] args) { //LanguageBasics clsStringFormatDateTime myStringFormatDateTime = new clsStringFormatDateTime(); myStringFormatDateTime.Main(); } } } |
Step 3: Click on green arrow in toolbar in VS or press F5 to run program.