In this article, you will learn what is DateTime format in c#
DateTime format in c#: In this post, how to use DateTime format in C#. We use a formatting string with DateTime and ToString. Here we combine many format codes. Also: We need to specify a format string when using DateTime.ParseExact and DateTime.ParseExact.
Modified format. Here we modify the format string to get different outputs. We change some of the fields, the resulting string value is shorter.
C# program that uses a different format
using System;
class Program
{
static void Main()
{
DateTime time = DateTime.Now;
string dtformat = "M d h:mm yy";
Console.WriteLine(time.ToString(dtformat));
}
}
Output
09 13 11:48 20
Format string pattern
M display one-digit month number
d display one-digit day of the month
h display one-digit hour on 12-hour
mm display two-digit minutes
yy display two-digit yearC# program that uses DateTime format
using System;
class Program
{
static void Main()
{
// Use current time with a format string.
DateTime time = DateTime.Now;
string dtformat = "MMM ddd d HH:mm yyyy";
Console.WriteLine(time.ToString(dtformat));
}
}
Output
Feb Tue 11 13:15 2020
Format string pattern
MMM display three-letter month
ddd display three-letter day of the week
d display day of the month
HH display two-digit hours on 24-hour
mm display two-digit minutes
yyyy display four-digit yearThese are standard formats. They are useful in many programs. Single char DateTime format. We use a char with ToString or DateTime.ParseExact to specify a preset format.
DateTime.Parse
using System;
class Program
{
static void Main()
{
Console.WriteLine(dt.ToString("d"));
Console.WriteLine(dt.ToString("D"));
Console.WriteLine(dt.ToString("f"));
Console.WriteLine(dt.ToString("F"));
Console.WriteLine(dt.ToString("g"));
Console.WriteLine(dt.ToString("G"));
Console.WriteLine(dt.ToString("m"));
Console.WriteLine(dt.ToString("M"));
Console.WriteLine(dt.ToString("o"));
Console.WriteLine(dt.ToString("O"));
Console.WriteLine(dt.ToString("s"));
Console.WriteLine(dt.ToString("t"));
Console.WriteLine(dt.ToString("T"));
Console.WriteLine(dt.ToString("u"));
Console.WriteLine(dt.ToString("U"));
Console.WriteLine(dt.ToString("y"));
Console.WriteLine(dt.ToString("Y"));
DateTime dt = DateTime.Now;
}
}
Output
D Friday, September 11, 2020
f Friday, September 11, 2020 12:11 PM
F Friday, September 11, 2020 12:12:22 PM
g 9/11/2020 12:12 PM
G 9/11/2020 12:12:22 PM
m September 11
M September 11
o 2020-09-11T12:12:22.1020000-08:00
O 2020-09-11T12:12:22.1020000-08:00
s 2020-09-11T12:12:22
t 12:12 PM
T 12:12:22 PM
u 2009-02-27 12:12:22Z
U Friday, September 11, 2020 8:12:22 PM
y September, 2020
Y September, 2020
d 9/13/2020Date strings: Here we see the ToLongTimeString, ToLongDateString, ToShortTimeString and ToShortDateString, methods on DateTime.
string.Format
C# program that uses ToString methods
using System;
class Program
{
static void Main()
{
DateTime now = DateTime.Now;
// Equivalent to D.
Console.WriteLine(now.ToLongDateString());
// Equivalent to T.
Console.WriteLine(now.ToLongTimeString());
// Equivalent to d.
Console.WriteLine(now.ToShortDateString());
// Equivalent to t.
Console.WriteLine(now.ToShortTimeString());
Console.WriteLine(now.ToString());
}
}Output
ToLongDateString Friday, September 11, 2020
ToLongTimeString 12:20:59 PM
ToShortDateString 9/11/2020
ToShortTimeString 12:16 PM
ToString 9/11/2020 12:20:59 PM
Minutes format: Two lowercase ms has a leading zero if the number is only one digit long. We use the lowercase code "mm" for minutes. For minutes, we must use 2 chars.
Note: Just one "m" does not return minutes—it returns the month and day.
C# program that shows minute part
using System;
class Program
{
static void Main()
{
// Create DateTime with 5 minutes.
DateTime nineMinutes = new DateTime(2020, 4, 5, 3, 5, 0);
Console.WriteLine("mm: {0}", nineMinutes.ToString("mm"));
}
}Output
mm: 05
Lowercase s: The lowercase s displays seconds. With ss we always want two digits, such as 00-59.
C# program that uses s format
using System;
using static System.Console;
class Program
{
static void Main()
{
DateTime dt = DateTime.Now;
// Use space after s to avoid one-char date format.
string result = now.ToString("s ");
WriteLine($"{dt} [s] = {result}");
}
}Output
11/9/2020 12:04:17 PM [s] = 20
Hours format:
C# program that uses hours format
using System;
class Program
{
static void Main()
{
// Create DateTime with 13 hours, or 1 PM.
var result = new DateTime(2020, 11, 9, 13, 0, 0);
Console.WriteLine("HH: {0}", result.ToString("HH"));
}
}Output
HH: 13
Day format: For days we use one to four d chars. One "d" and "dd" indicate the day of the month, while "ddd" and "dddd" indicate the day of the week, in a word.
C# program that uses "ddd" and "dddd"
using System;
class Program
{
static void Main()
{
DateTime time = new DateTime(2020, 9, 11);
// Console.WriteLine and string.Format can handle dates.
Console.WriteLine("Two letters: {0:ddd}", time);
Console.WriteLine("Three letters: {0:dddd}", time);
}
}Output
Two letters: Fri
Three letters: Friday
Complete day:
C# program that shows day strings
using System;
class Program
{
static void Main()
{
DateTime dt = DateTime.Today;
for (int i = 0; i < 7; i++)
{
Console.WriteLine(dt.ToString("dddd"));
dt = dt.AddDays(1);
}
}
}Output
Friday
Saturday
Sunday
Monday
Tuesday
Wednesday
Thursday
Three-letter days:
using System;
class Program
{
static void Main()
{
DateTime dt = DateTime.Today;
for (int i = 0; i < 7; i++)
{
Console.WriteLine(dt.ToString("ddd"));
dt = dt.AddDays(1);
}
}
}Output
Fri
Sat
Sun
Mon
Tue
Wed
Thu
Month format:
C# program that uses month formats
using System;
class Program
{
static void Main()
{
DateTime test = new DateTime(2020, 9, 9);
Console.WriteLine("M: {0}", test.ToString("M"));
Console.WriteLine("MM: {0}", test.ToString("MM"));
Console.WriteLine("MMM: {0}", test.ToString("MMM"));
Console.WriteLine("MMMM: {0}", test.ToString("MMMM"));
}
}Output
M: September 9
MM: 09
MMM: Sep
MMMM: September
Era.
C# program that prints the current era
using System;
class Program
{
static void Main()
{
// We are in A.D. era.
Console.WriteLine(DateTime.Now.ToString("gg"));
}
}Output
A.D.
AM, PM Format: When you specify one t, you can get the first letter of the AM or PM string. This is equivalent to using Substring or getting the first char of the tt string.
C# program that displays AM and PM
using System;
class Program
{
static void Main()
{
DateTime dt = DateTime.Now;
for (int i = 0; i < 2; i++)
{
Console.WriteLine(dt.ToString("tt "));
dt = dt.AddHours(12);
}
}
}Output
PM
AM
Year Format:
Note: In almost all programs, we will not need three or five digits for the year, but these codes exist.
C# program that displays years
using System;
class Program
{
static void Main()
{
DateTime now = DateTime.Now;
Console.WriteLine(now.ToString("y "));
Console.WriteLine(now.ToString("yy"));
Console.WriteLine(now.ToString("yyy"));
Console.WriteLine(now.ToString("yyyy"));
Console.WriteLine(now.ToString("yyyyy"));
}
}Output
0
20
2020
2020
02020
FormatException:
using System;
class Program
{
static void Main()
{
const string dt = "*";
string result = DateTime.Today.ToString(dt);
}
}Output
Unhandled Exception: System.FormatException: The input string was not in a correct format.
at System.DateTimeFormat
.GetRealFormat
Null. When we format a DateTime with a format string that is null, empty, or missing, we get a default format. We can just omit the argument if we do not have a special format we need.
C# program that uses null, empty, missing formats
using System;
class Program
{
static void Main()
{
var dt = new DateTime(2000, 9, 11);
Console.WriteLine("NULL FORMAT STRING: {0}", dt.ToString((string)null));
Console.WriteLine("MISSING FORMAT STRING: {0}", dt.ToString());
Console.WriteLine("EMPTY FORMAT STRING: {0}", dt.ToString(""));
}
}Output
NULL FORMAT STRING: 9/11/2020 12:00:00 AM
MISSING FORMAT STRING: 9/11/2020 12:00:00 AM
EMPTY FORMAT STRING: 9/11/2020 12:00:00 AM
Tags:-
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DateTime format in c# - Change DateTime format in C#, Change date format in C#, c# datetime format yyyy-mm-dd
C# is a programming language developed by Microsoft that runs on the .NET Framework. C# is used to develop web, desktop, mobile, games and much more application.
C# is a object-oriented programming language developed by Microsoft within its .NET Framework. Led by Anders Hejlsberg, your basic C# programming
and will also take you through various advanced concepts related to C# programming language.
C# such as control statements, objects and classes, inheritance, constructor, destructor, this, static, sealed, polymorphism, abstraction, abstract class, interface, File IO, Collections, namespace, encapsulation, properties, indexer, arrays, strings, regex, exception handling, multithreading etc.
For example...
using System;
namespace MinifyCode
{
class Program
{
static void Main(string[] args)
{
Console.WriteLine("Hello Minify Code");
}
}
}
Output: Hello Minify Code
In this article you will learn, what is server side controls. We will discuss each of these objects in due time. In this tutorial we will explore the Server object, the Request object, and the Response object.
Session
Application
Cache
Request
Response
Server
User
Trace
Server Object
The Server object in Asp.NET is an instance of the System.Web.HttpServerUtility class. The HttpServerUtility class provides numerous properties and methods to perform many type of jobs.
Methods and Properties of the Server object
The methods and properties of the HttpServerUtility class are exposed through the intrinsic Server object provided by ASP.NET.
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Optimization;
using System.Web.Routing;
using System.Web.Security;
using System.Web.SessionState;
using System.Data.Entity;
namespace minifycode
{
public class Global : HttpApplication
{
void Application_Start(object sender, EventArgs e)
{
// Code that runs on application startup
RouteConfig.RegisterRoutes(RouteTable.Routes);
BundleConfig.RegisterBundles(BundleTable.Bundles);
// Initialize the product database.
Database.SetInitializer(new ProductDatabaseInitializer());
// Create custom role and user.
RoleActions roleActions = new RoleActions();
roleActions.AddUserAndRole();
// Add Routes.
RegisterCustomRoutes(RouteTable.Routes);
}
void RegisterCustomRoutes(RouteCollection routes)
{
routes.MapPageRoute(
"ProductsCategoryRoute",
"Category/{categoryName}",
"~/ProductList.aspx"
);
routes.MapPageRoute(
"ProductNameRoute",
"Product/{productName}",
"~/ProductDetails.aspx"
);
}
}
}