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C# Pretty Date Format (Hours or Minutes Ago)
Format friendly or pretty dates like one hour ago or just now. Review the logic for pretty dates.Pretty dates are easier to read. They are nicely formatted. We can show "1 hour ago" or "1 minute ago", instead of seconds. We implement a pretty date method for use in ASP.NET or Windows programs.DateTime
Example. Prettily-formatted dates are sometimes overlooked in ASP.NET or Windows applications. This final touch can improve your program. To display usable relative and pretty dates, you need to calculate the time elapsed from the original date.
So: The method here receives the original DateTime, and then uses DateTime.Now to calculate the elapsed time.
DateTime.NowGetPrettyDate: The first steps in the GetPrettyDate method take the elapsed days and seconds from the original date.
DateTime, ElapsedStep 5: Here we handle recent dates, in the same day. You can see in parts A - E that there is a chain of conditionals that return pretty strings.
Step 6: Finally, we handle more distant dates. The method here doesn't handle months and years.
C# program that displays pretty dates
using System;
class Program
{
static void Main()
{
// Test 90 seconds ago.
Console.WriteLine(GetPrettyDate(DateTime.Now.AddSeconds(-90)));
// Test 25 minutes ago.
Console.WriteLine(GetPrettyDate(DateTime.Now.AddMinutes(-25)));
// Test 45 minutes ago.
Console.WriteLine(GetPrettyDate(DateTime.Now.AddMinutes(-45)));
// Test 4 hours ago.
Console.WriteLine(GetPrettyDate(DateTime.Now.AddHours(-4)));
// Test 15 days ago.
Console.WriteLine(GetPrettyDate(DateTime.Now.AddDays(-15)));
}
static string GetPrettyDate(DateTime d)
{
// 1.
// Get time span elapsed since the date.
TimeSpan s = DateTime.Now.Subtract(d);
// 2.
// Get total number of days elapsed.
int dayDiff = (int)s.TotalDays;
// 3.
// Get total number of seconds elapsed.
int secDiff = (int)s.TotalSeconds;
// 4.
// Don't allow out of range values.
if (dayDiff < 0 || dayDiff >= 31)
{
return null;
}
// 5.
// Handle same-day times.
if (dayDiff == 0)
{
// A.
// Less than one minute ago.
if (secDiff < 60)
{
return "just now";
}
// B.
// Less than 2 minutes ago.
if (secDiff < 120)
{
return "1 minute ago";
}
// C.
// Less than one hour ago.
if (secDiff < 3600)
{
return string.Format("{0} minutes ago",
Math.Floor((double)secDiff / 60));
}
// D.
// Less than 2 hours ago.
if (secDiff < 7200)
{
return "1 hour ago";
}
// E.
// Less than one day ago.
if (secDiff < 86400)
{
return string.Format("{0} hours ago",
Math.Floor((double)secDiff / 3600));
}
}
// 6.
// Handle previous days.
if (dayDiff == 1)
{
return "yesterday";
}
if (dayDiff < 7)
{
return string.Format("{0} days ago",
dayDiff);
}
if (dayDiff < 31)
{
return string.Format("{0} weeks ago",
Math.Ceiling((double)dayDiff / 7));
}
return null;
}
}
Output
1 minute ago
25 minutes ago
45 minutes ago
4 hours ago
3 weeks ago
Original. I wanted to follow the logic in the original pretty.js JavaScript code, because I felt it would be best to follow the same rules. This way, you can swap the two methods and use one on the ASP.NET server and the other in JavaScript.JavaScript Pretty Date: ejohn.org
Note: Thanks to John Resig for the original code and inspiration. His code is under the MIT license.
Summary. We looked at how to display well-formatted and human-readable pretty dates. This code is mainly a finishing touch for your applications. It is something that I wished I had when rushing to complete a project.
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- C# Regex.Replace, Matching End of String
- C# Regex.Replace, Remove Numbers From String
- C# Regex.Replace, Merge Multiple Spaces
- C# Regex.Replace Examples: MatchEvaluator
- C# Regex.Split, Get Numbers From String
- C# Regex.Split Examples
- C# Regex Trim, Remove Start and End Spaces
- C# RegexOptions.Compiled
- C# RegexOptions.IgnoreCase Example
- C# RegexOptions.Multiline
- C# Region and endregion
- C# Remove Char From String at Index
- C# Remove Element
- C# Remove HTML Tags
- C# Remove String
- C# Reserved Filenames
- C# return Keyword
- C# Reverse String
- C# Reverse Words
- C# Reverse Extension Method
- C# RichTextBox Example
- C# Right String Part
- C# RNGCryptoServiceProvider Example
- C# ROT13 Method, Char Lookup Table
- C# SelectMany Example: LINQ
- C# Sentinel Optimization
- C# SequenceEqual Method (If Two Arrays Are Equal)
- C# Shift Operators (Bitwise)
- C# Short and ushort Types
- C# Single Method: Get Element If Only One Matches
- C# SingleOrDefault
- C# Singleton Pattern Versus Static Class
- C# Singleton Class
- C# sizeof Keyword
- C# Skip and SkipWhile Examples
- C# Sleep Method (Pause)
- C# Sort Dictionary: Keys and Values
- C# Sort by File Size
- C# Sort, Ignore Leading Chars
- C# Sort KeyValuePair List: CompareTo
- C# Sort Strings by Length
- C# Thread.SpinWait Example
- C# Math.Sqrt Method
- C# stackalloc Operator
- C# StackOverflowException
- C# StartsWith and EndsWith String Methods
- C# Static Array
- C# Static Dictionary
- C# Stopwatch Examples
- C# Stream
- C# StreamReader ReadToEnd Example (Read Entire File)
- C# StreamReader ReadToEndAsync Example (Performance)
- C# StreamReader Examples
- C# StreamWriter Examples
- C# String Append (Add Strings)
- C# String Compare and CompareTo Methods
- C# String Constructor (new string)
- C# string.Copy Method
- C# CopyTo String Method: Put Chars in Array
- C# Empty String Examples
- C# String Equals Examples
- C# String For Loop, Count Spaces in String
- C# string.Intern and IsInterned
- C# String IsUpper, IsLower
- C# String Length Property: Get Character Count
- C# String Literal: Newline and Quote Examples
- C# StringBuilder Capacity
- C# StringBuilder Clear (Set Length to Zero)
- C# StringBuilder Data Types
- C# StringBuilder Performance
- C# StringBuilder Equals (If Chars Are Equal)
- C# StringBuilder Memory
- C# StringBuilder ToString: Get String From StringBuilder
- C# StringWriter Class
- C# Sum Method: Add up All Numbers
- C# Switch Char, Test Chars With Cases
- C# Switch Enum
- C# System (using System namespace)
- C# Tag Property: Windows Forms
- C# TextInfo Examples
- C# TextReader, Returned by File.OpenText
- C# TextWriter, Returned by File.CreateText
- C# this Keyword
- C# ThreadPool
- C# Thread Join Method (Join Array of Threads)
- C# ThreadPool.SetMinThreads Method
- C# TimeZone Examples
- C# Get Title From HTML With Regex
- C# ToArray Extension Method
- C# ToCharArray: Convert String to Array
- C# ToDictionary Method
- C# Token
- C# ToList Extension Method
- C# ToLookup Method (Get ILookup)
- C# ToLower and ToUpper: Uppercase and Lowercase Strings
- ToolStripContainer Control: Dock, Properties
- C# ToolTip: Windows Forms
- C# ToString Integer Optimization
- C# ToString: Get String From Object
- C# ToTitleCase Method
- C# TrackBar: Windows Forms
- C# Tree and Nodes Example: Directed Acyclic Word Graph
- C# TreeView Tutorial
- C# Trim Strings
- C# Thread Methods
- C# History
- C# Features
- C# Variables
- C# Data Types
- C# Operators
- C# Keywords
- C# New Features | C# Version Features
- C# Programs
- C# Program to swap numbers without third variable
- C# Program to convert Decimal to Binary
- C# Program to Convert Number in Characters
- C# Program to Print Alphabet Triangle
- C# Program to print Number Triangle
- C# Program to generate Fibonacci Triangle
- C# String Compare() method
- C# String CompareOrdinal() method
- C# String CompareTo() method
- C# String Concat() method
- C# String Contains() method
- C# String CopyTo() method
- C# String EndsWith() method
- C# String Equals() method
- C# String Format() method
- C# String IndexOf() method
- C# String Insert() method
- C# String Intern(String str) method
- C# String IsInterned() method
- C# String Normalize() method
- C# String IsNullOrEmpty() method
- C# String IsNullOrWhiteSpace() method
- C# String Join() method
- C# String LastIndexOf() method
- C# String LastIndexOfAny() method
- C# String PadLeft() method
- C# String PadRight() method
- C# Nullable
- C# String Remove() method
- C# String Replace() method
- C# String Split() method
- C# String StartsWith() method
- C# String SubString() method
- C# Partial Types
- C# Iterators
- C# Delegate Covariance
- C# Delegate Inference
- C# Anonymous Types
- C# Extension Methods
- C# Query Expression
- C# Partial Method
- C# Implicitly Typed Local Variable
- C# Object and Collection Initializer
- C# Auto Implemented Properties
- C# Dynamic Binding
- C# Named and Optional Arguments
- C# Asynchronous Methods
- C# Caller Info Attributes
- C# Using Static Directive
- C# Exception Filters
- C# Await in Catch Finally Blocks
- C# Default Values for Getter Only Properties
- C# Expression Bodied Members
- C# Null Propagator
- C# String Interpolation
- C# nameof operator
- C# Dictionary Initializer
- C# Pattern Matching
- C# Tuples
- C# Deconstruction
- C# Local Functions
- C# Binary Literals
- C# Ref Returns and Locals
- C# Expression Bodied Constructors and Finalizers
- C# Expression Bodied Getters and Setters
- C# Async Main
- C# Default Expression