Mēs izmantojām DateTime, kad ir nepieciešams strādāt ar datumiem un laikiem C#.

Mēs varam formatēt datumu un laiku dažādos formātos, izmantojot DateTime./p> rekvizītus un metodes

Datuma un laika vērtība ir no 12:00:00 pusnakts, 1 0001. gada janvāris un 23:59:59, 9999. gada 31. decembris.

Šeit mēs paskaidrosim, kā izveidot datumu laiku C #.

Mums ir dažādi veidi, kā izveidot DateTime objektu. Datuma un laika objektam ir laiks, kultūra, datums, lokalizācija, milisekundes.

Šeit mums ir kods, kas parāda dažādus konstruktorus, ko DateTime struktūra izmanto, lai izveidotu DateTime objektus.

 // From DateTime create the Date and Time DateTime DOB= new DateTime(19, 56, 8, 12, 8, 12, 23); // From String creation of DateTime string DateString= '8/12/1956 7:10:24 AM'; DateTime dateFromString = DateTime.Parse(DateString, System.Globalization.CultureInfo.InvariantCulture); Console.WriteLine(dateFromString.ToString()); // Empty DateTime DateTime EmpDateTime= new DateTime(); // Just date DateTime OnlyDate= new DateTime(2002, 10, 18); // DateTime from Ticks DateTime OnlyTime= new DateTime(10000000); // Localization with DateTime DateTime DateTimewithKind = new DateTime(1976, 7, 10, 7, 10, 24, DateTimeKind.Local); // DateTime with date, time and milliseconds DateTime WithMilliseconds= new DateTime(2010, 12, 15, 5, 30, 45, 100); 

Datuma un laika rekvizīti C#

Datums un laiks ir rekvizīts Date and Time. No DateTime mēs varam atrast datumu un laiku. DateTime satur arī citus rekvizītus, piemēram, stunda, minūte, sekunde, milisekunde, gads, mēnesis un diena.

Citi DateTime rekvizīti ir:

1. Mēs varam iegūt dienas nosaukumu no nedēļas, izmantojot DayOfWeek rekvizītu.
2. Lai iegūtu gada dienu, mēs izmantosim DayOfYear īpašumu.
3. Lai iegūtu laiku DateTime, mēs izmantojam TimeOfDay rekvizītu.
4. Šodien īpašums atgriezīs DateTime objektu, kam ir šodienas vērtība. Laika vērtība ir 12:00:00
5. Rekvizīts Tagad atgriezīs objektu DateTime, kuram ir pašreizējais datums un laiks.
6. Datuma laika Utc rekvizīts atgriezīs koordinēto universālo laiku (UTC).
7. Viena ķeksīte apzīmē simts nanosekundes datumā un laikā. Datuma laika rekvizīts Ticks atgriež atzīmju skaitu DateTime.
8. Rekvizīts Kind atgriež vērtību, kurā laika attēlojumu veic gadījums, kura pamatā ir vietējais laiks, koordinētais universālais laiks (UTC). Tas parāda arī nenoteiktu noklusējuma vērtību.

Šeit mēs ņemam piemēru, kā izmantot DateTime rekvizītus C# kodā.

Piemērs:

 using System; using System.Collections; using System.Collections.Generic; using System.Linq; using System.Text; using System.Threading.Tasks; namespace ConsoleApp8 { class Program { static void Main(string[] args) { DateTime DateTimeProperty = new DateTime(1974, 7, 10, 7, 10, 24); Console.WriteLine('Day:{0}', DateTimeProperty.Day); Console.WriteLine('Month:{0}', DateTimeProperty.Month); Console.WriteLine('Year:{0}', DateTimeProperty.Year); Console.WriteLine('Hour:{0}', DateTimeProperty.Hour); Console.WriteLine('Minute:{0}', DateTimeProperty.Minute); Console.WriteLine('Second:{0}', DateTimeProperty.Second); Console.WriteLine('Millisecond:{0}', DateTimeProperty.Millisecond); Console.WriteLine('Day of Week:{0}', DateTimeProperty.DayOfWeek); Console.WriteLine('Day of Year: {0}', DateTimeProperty.DayOfYear); Console.WriteLine('Time of Day:{0}', DateTimeProperty.TimeOfDay); Console.WriteLine('Tick:{0}', DateTimeProperty.Ticks); Console.WriteLine('Kind:{0}', DateTimeProperty.Kind); } } } 

Izvade:

Datuma un laika saskaitīšana un atņemšana C#

Datuma un laika struktūra nodrošina metodes datuma un laika pievienošanai un atņemšanai DateTime objektam un no tā. Datumu DateTime struktūrā mēs varam pievienot un atņemt DateTime objektam un no tā. Datuma un laika saskaitīšanai un atņemšanai mēs izmantojam TimeSpan struktūru.

Saskaitīšanai un atņemšanai mēs varam izmantot pievienošanas un atņemšanas metodi no DateTime objekta. Pirmkārt, mēs izveidojam laika posmu ar datuma un laika vērtībām, izmantojot pievienošanas un atņemšanas metodes.

Šeit mēs izveidojam kodu, kas pievienos 3 un atņems 30 dienas no šodienas un parādīs dienu konsolē.

 using System; using System. Collections; using System.Collections.Generic; using System. Linq; using System. Text; using System.Threading.Tasks; namespace ConsoleApp8 { class Program { static void Main(string[] args) { DateTime Day = DateTime.Now; TimeSpan Month = new System.TimeSpan(30, 0, 0, 0); DateTime aDayAfterAMonth = Day.Add(Month); DateTime aDayBeforeAMonth = Day.Subtract(Month); Console.WriteLine('{0:dddd}', aDayAfterAMonth); Console.WriteLine('{0:dddd}', aDayBeforeAMonth); } } } 

Datuma un laika struktūra satur metodes, kā pievienot gadus, dienas, stundas, minūtes, sekundes.

Lai DateTime objektam pievienotu dažādus komponentus, tiek izmantota pievienošanas metode .

 // To Add the Years and Days day.AddYears(2); day.AddDays(12); // Add Hours, Minutes, Seconds, Milliseconds, and Ticks Day.AddHours(4.25); day.AddMinutes(15); day.AddSeconds(45); day.AddMilliseconds(200); day.AddTicks(5000); 

Datums un laiks nesatur atņemšanas metodi. Lai atņemtu DateTime komponentu, mēs izmantosim tikai atņemšanas metodi. Piemēram: ja mums ir jāatņem 12 dienas no DateTime, mēs varam izveidot citu DateTime vai TimeSpan objekta objektu ar 12 dienām. Tagad mēs atņemsim šo objektu no DateTime. Alternatīvi mēs varam izmantot mīnus operatoru, lai no DateTime atņemtu DateTime vai TimeSpan.

Tagad mēs izveidosim kodu, ar kuru mēs varam izveidot DateTime objektu un atņemt citu DateTime un TimeSpan objektu. Kodā mēs parādīsim tikai stundu, dienu vai citu komponentu atņemšanu no datuma un laika.

 DateTime DOB = new DateTime(2000, 10, 20, 12, 15, 45); DateTime SubtractDate = new DateTime(2000, 2, 6, 13, 5, 15); // Use the TimeSpan with 10 days, 2 hrs, 30 mins, 45 seconds, and 100 milliseconds TimeSpan ts = new TimeSpan(10, 2, 30, 45, 100); // Subtract the DateTime TimeSpan Different = DOB.Subtract(SubtractDate); Console.WriteLine(Different.ToString()); // Subtract the TimeSpan DateTime Different2 = DOB.Subtract(ts); Console.WriteLine(Different2.ToString()); // Subtract 10 Days by creating the object SubtractedDays DateTime SubtractedDays = new DateTime(DOB.Year, DOB.Month, DOB.Day - 10); Console.WriteLine(SubtractedDays.ToString()); // Subtract hours, minutes, and seconds with creating the object HoursMinutesSeconds DateTime HoursMinutesSeconds = new DateTime(DOB.Year, DOB.Month, DOB.Day, DOB.Hour - 1, DOB.Minute - 15, DOB.Second - 15); Console.WriteLine(HoursMinutesSeconds.ToString()); 

Mēneša dienu meklēšana

Lai atrastu dienu skaitu mēnesī, mēs izmantojām statisko DienasMēnesī metodi. Šī meklēšanas metode [] izmanto parametru skaitļos no 1 līdz 12.

Šeit mēs uzrakstīsim kodu, caur kuru mēs uzzināsim dienu skaitu konkrētajā mēnesī.

Šeit mēs uzzināsim dienu skaitu 2020. gada februārī. Izlaide būs 28 dienas.

 int NumberOfDays = DateTime.DaysInMonth(2004, 2); Console.WriteLine(NumberOfDays); 

Ar to pašu paņēmienu mēs varam uzzināt kopējo dienu skaitu gadā. Šim nolūkam izmantosim metodi DaysInYear.

 private int DaysInYear(int year) { int DaysIN= 0; for (int j = 1; j <= 12; j++) { daysin +="DateTime.DaysInMonth(year," j); } return daysin; < pre> <h2>Comparison of two DateTime in C#</h2> <p> <strong>The comparer</strong> static method is used to compare the object of the two datetime. If the objects of both <strong>DateTime</strong> is the same, then the result will be 0. If the first DateTime is earlier, then the result will be 0 else the first DateTime would be later.</p> <p> <strong>Now we will show the comparison of the two datetime objects in C#.</strong> </p> <pre> using System; using System. Collections; using System.Collections.Generic; using System. Linq; using System. Text; using System.Threading.Tasks; namespace ConsoleApp8 { class Program { static void Main(string[] args) { DateTime DateOfFirst = new DateTime(2002, 10, 22); DateTime DateOfSecond = new DateTime(2009, 8, 11); int result1 = DateTime.Compare(DateOfFirst, DateOfSecond); if (result1 <0) console.writeline('date of first is earlier'); else if (result1="=" 0) console.writeline('both dates are same'); later'); } < pre> <p> <strong>Output:</strong> </p> <img src="//techcodeview.com/img/net-framework/10/datetime-c-2.webp" alt="DateTime in C#"> <h2>CompareTo Method</h2> <p>CompareTo method is used to compare the two dates. We will assign the DateTime or object in this method.</p> <p>To compare the two DateTime object, we used the CompareTo method. Below we have a C# code to compare the DateTime object.</p> <pre> using System; using System. Collections; using System.Collections.Generic; using System. Linq; using System. Text; using System.Threading.Tasks; namespace ConsoleApp8 { class Program { static void Main(string[] args) { DateTime DateOfFirst = new DateTime(2001, 10, 20); DateTime DateOfSecond = new DateTime(2009, 8, 11); int ResultOfComparison = DateOfFirst.CompareTo(DateOfSecond); if (ResultOfComparison <0) console.writeline('date of first is earlier'); else if (resultofcomparison="=" 0) both are same'); later'); } < pre> <p> <strong>Output:</strong> </p> <img src="//techcodeview.com/img/net-framework/10/datetime-c-3.webp" alt="DateTime in C#"> <h2>Formatting of the DateTime in C#</h2> <p>In C#, we can format the DateTime to any type of string format as we want.</p> <p>For the formatting of the DateTime, we used the <strong>GetDateTimeFormats</strong> method, which returns all the possible DateTime formats for the current culture of the computer.</p> <p>Here we have a C# code that returns the array of the strings of all the possible standard formats.</p> <pre> using System; using System. Collections; using System.Collections.Generic; using System. Linq; using System. Text; using System.Threading.Tasks; namespace ConsoleApp8 { class Program { static void Main(string[] args) { DateTime DateOfMonth = new DateTime(2020, 02, 25); string[] FormatsOfDate = DateOfMonth.GetDateTimeFormats(); foreach (string format in FormatsOfDate) Console.WriteLine(format); } } } </pre> <p> <strong>Output:</strong> </p> <img src="//techcodeview.com/img/net-framework/10/datetime-c-4.webp" alt="DateTime in C#"> <br> <img src="//techcodeview.com/img/net-framework/10/datetime-c-5.webp" alt="DateTime in C#"> <p>We can overload the <strong>GetDateTimeFormats</strong> method, which takes the format specifier as a parameter and converts the DateTime to that format. To get the desired format, we need to understand the format of the <strong>DateTime</strong> specifiers.</p> <p>We will show it with the code with the pattern in a table.</p> <table class="table"> <tr> <th>Code</th> <th>Pattern</th> </tr> <tr> <td>&apos;d&apos;</td> <td>Short date</td> </tr> <tr> <td>&apos;D&apos;</td> <td>Long date</td> </tr> <tr> <td>&apos;f&apos;</td> <td>Full date time. Short time.</td> </tr> <tr> <td>&apos;F&apos;</td> <td>Full date time. Long Time.</td> </tr> <tr> <td>&apos;g&apos;</td> <td>Generate date time. Long Time.</td> </tr> <tr> <td>&apos;G&apos;</td> <td>General date time. Long Time.</td> </tr> <tr> <td>&apos;M&apos;,&apos;m.&apos;</td> <td>Month/day</td> </tr> <tr> <td>&apos;O&apos;,&apos;o&apos;</td> <td>Round trip date/time.</td> </tr> <tr> <td>&apos;R&apos;,&apos;r&apos;</td> <td>RFC1123</td> </tr> <tr> <td>&apos;s&apos;</td> <td>Sortable date time.</td> </tr> <tr> <td>&apos;t&apos;</td> <td>Sort Time</td> </tr> <tr> <td>&apos;T&apos;</td> <td>Long Time</td> </tr> <tr> <td>&apos;u&apos;</td> <td>Universal sortable date time.</td> </tr> <tr> <td>&apos;U&apos;</td> <td>Universal full date-time.</td> </tr> <tr> <td>&apos;Y&apos;,&apos;y&apos;</td> <td>Year, Month</td> </tr> </table> <p> <strong>We will specify the format of the DateTime in the below C# Code. </strong> </p> <pre> using System; using System. Collections; using System.Collections.Generic; using System. Linq; using System. Text; using System.Threading.Tasks; namespace ConsoleApp8 { class Program { static void Main(string[] args) { DateTime FormatOfDate = new DateTime(2020, 02, 25); // DateTime Formats: d, D, f, F, g, G, m, o, r, s, t, T, u, U, Console.WriteLine(&apos;----------------&apos;); Console.WriteLine(&apos;d Formats&apos;); Console.WriteLine(&apos;----------------&apos;); string[] DateFormat = FormatOfDate.GetDateTimeFormats(&apos;d&apos;); foreach (string format in DateFormat) Console.WriteLine(format); Console.WriteLine(&apos;----------------&apos;); Console.WriteLine(&apos;D Formats&apos;); Console.WriteLine(&apos;----------------&apos;); DateFormat = FormatOfDate.GetDateTimeFormats(&apos;D&apos;); foreach (string format in DateFormat) Console.WriteLine(format); Console.WriteLine(&apos;----------------&apos;); Console.WriteLine(&apos;f Formats&apos;); Console.WriteLine(&apos;----------------&apos;); DateFormat = FormatOfDate.GetDateTimeFormats(&apos;f&apos;); foreach (string format in DateFormat) Console.WriteLine(format); Console.WriteLine(&apos;----------------&apos;); Console.WriteLine(&apos;F Formats&apos;); Console.WriteLine(&apos;----------------&apos;); DateFormat = FormatOfDate.GetDateTimeFormats(&apos;F&apos;); foreach (string format in DateFormat) Console.WriteLine(format); } } } </pre> <p> <strong>Output:</strong> </p> <img src="//techcodeview.com/img/net-framework/10/datetime-c-6.webp" alt="DateTime in C#"> <br> <img src="//techcodeview.com/img/net-framework/10/datetime-c-7.webp" alt="DateTime in C#"> <p>We can also do the formatting of the DateTime by passing the format specifier in the ToString() method of DateTime. Now we will write the C# code for the formatting of the DateTime using the ToString() method.</p> <pre> Console.WriteLine(DateOfFormat.ToString(&apos;r&apos;)); </pre> <p>Now we will write a C# code for the DateTime format specifiers within the ToString() method.</p> <img src="//techcodeview.com/img/net-framework/10/datetime-c-8.webp" alt="DateTime in C#"> <h2>Get the Leap Year and Daylight-Saving Time</h2> <p>Through the C# Code, we will get the Leap Year and Daylight-Saving Time.</p> <pre> using System; using System. Collections; using System.Collections.Generic; using System. Linq; using System. Text; using System.Threading.Tasks; namespace ConsoleApp8 { class Program { static void Main(string[] args) { DateTime DateOfTime = new DateTime(2020, 02, 22); Console.WriteLine(DateOfTime.IsDaylightSavingTime()); Console.WriteLine(DateTime.IsLeapYear(DateOfTime.Year)); } } } </pre> <p> <strong>Output:</strong> </p> <img src="//techcodeview.com/img/net-framework/10/datetime-c-9.webp" alt="DateTime in C#"> <h2>Conversion of string to the DateTime</h2> <p>To convert the string to a DateTime object, we used the Parse method. In the Parse method, the passing string must have the correct format of the DateTime. For the conversion of the DateTime to the String, the ToString() method is used. </p> <pre> using System; using System. Collections; using System.Collections.Generic; using System. Linq; using System. Text; using System.Threading.Tasks; namespace ConsoleApp8 { class Program { static void Main(string[] args) { string DT = &apos;2020-02-04T20:12:45-5:00&apos;; DateTime NEWDt = DateTime.Parse(DT); Console.WriteLine(NEWDt.ToString()); } } } </pre> <p> <strong>Output:</strong> </p> <img src="//techcodeview.com/img/net-framework/10/datetime-c-10.webp" alt="DateTime in C#"> <h2>Conversion of DateTime in C#</h2> <p>The structure of the DateTime is full of self-explanatory conversion, which converts the DateTime to the specific type. The methods are ToFileTime, ToLocalTime, ToLongDateString, ToBinary ,ToLongTimeString, ToOADate, ToShortDateString, ToShortTimeString, ToString, and ToUniversalTime.</p> <p>Here we will take an example of C# to convert the DateTime to the specific type.</p> <pre> using System; using System. Collections; using System.Collections.Generic; using System. Linq; using System. Text; using System.Threading.Tasks; namespace ConsoleApp8 { class Program { static void Main(string[] args) { DateTime DOB = new DateTime(2020, 01, 22); Console.WriteLine(&apos;ToString: &apos; + DOB.ToString()); Console.WriteLine(&apos;ToBinary: &apos; + DOB.ToBinary()); Console.WriteLine(&apos;ToFileTime: &apos; + DOB.ToFileTime()); Console.WriteLine(&apos;ToLocalTime: &apos; + DOB.ToLocalTime()); Console.WriteLine(&apos;ToLongDateString: &apos; + DOB.ToLongDateString()); Console.WriteLine(&apos;ToLongTimeString: &apos; + DOB.ToLongTimeString()); Console.WriteLine(&apos;ToOADate: &apos; + DOB.ToOADate()); Console.WriteLine(&apos;ToShortDateString: &apos; + DOB.ToShortDateString()); Console.WriteLine(&apos;ToShortTimeString: &apos; + DOB.ToShortTimeString()); Console.WriteLine(&apos;ToUniversalTime: &apos; + DOB.ToUniversalTime()); } } } </pre> <p> <strong>Output:</strong> </p> <img src="//techcodeview.com/img/net-framework/10/datetime-c-11.webp" alt="DateTime in C#"> <hr></0)></pre></0)></pre></=>

Izvade:

Mēs varam pārslogot GetDateTimeFormats metodi, kas kā parametru izmanto formāta norādītāju un pārvērš datumu un laiku šajā formātā. Lai iegūtu vēlamo formātu, mums ir jāsaprot formāts Datums Laiks specifikācijas.

Mēs to parādīsim ar kodu ar modeli tabulā.

Mēs norādīsim DateTime formātu zemāk esošajā C# kodā.

 using System; using System. Collections; using System.Collections.Generic; using System. Linq; using System. Text; using System.Threading.Tasks; namespace ConsoleApp8 { class Program { static void Main(string[] args) { DateTime FormatOfDate = new DateTime(2020, 02, 25); // DateTime Formats: d, D, f, F, g, G, m, o, r, s, t, T, u, U, Console.WriteLine('----------------'); Console.WriteLine('d Formats'); Console.WriteLine('----------------'); string[] DateFormat = FormatOfDate.GetDateTimeFormats('d'); foreach (string format in DateFormat) Console.WriteLine(format); Console.WriteLine('----------------'); Console.WriteLine('D Formats'); Console.WriteLine('----------------'); DateFormat = FormatOfDate.GetDateTimeFormats('D'); foreach (string format in DateFormat) Console.WriteLine(format); Console.WriteLine('----------------'); Console.WriteLine('f Formats'); Console.WriteLine('----------------'); DateFormat = FormatOfDate.GetDateTimeFormats('f'); foreach (string format in DateFormat) Console.WriteLine(format); Console.WriteLine('----------------'); Console.WriteLine('F Formats'); Console.WriteLine('----------------'); DateFormat = FormatOfDate.GetDateTimeFormats('F'); foreach (string format in DateFormat) Console.WriteLine(format); } } } 

Izvade:

lasīt excel failu java

Mēs varam arī formatēt DateTime, nododot formāta norādītāju DateTime metodē ToString(). Tagad mēs rakstīsim C# kodu DateTime formatēšanai, izmantojot metodi ToString ().

 Console.WriteLine(DateOfFormat.ToString('r')); 

Tagad mēs rakstīsim C# kodu DateTime formāta specifikācijām metodes ToString() ietvaros.

Iegūstiet garo gadu un vasaras laiku

Izmantojot C# kodu, mēs iegūsim garo gadu un vasaras laiku.

 using System; using System. Collections; using System.Collections.Generic; using System. Linq; using System. Text; using System.Threading.Tasks; namespace ConsoleApp8 { class Program { static void Main(string[] args) { DateTime DateOfTime = new DateTime(2020, 02, 22); Console.WriteLine(DateOfTime.IsDaylightSavingTime()); Console.WriteLine(DateTime.IsLeapYear(DateOfTime.Year)); } } } 

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Virknes pārvēršana par datumu un laiku

Lai pārvērstu virkni par DateTime objektu, mēs izmantojām parsēšanas metodi. Izmantojot parsēšanas metodi, pārejas virknei ir jābūt pareizam datuma un laika formātam. Datuma un laika konvertēšanai uz virkni tiek izmantota metode ToString().

 using System; using System. Collections; using System.Collections.Generic; using System. Linq; using System. Text; using System.Threading.Tasks; namespace ConsoleApp8 { class Program { static void Main(string[] args) { string DT = '2020-02-04T20:12:45-5:00'; DateTime NEWDt = DateTime.Parse(DT); Console.WriteLine(NEWDt.ToString()); } } } 

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Datuma un laika konvertēšana C#

Datuma un laika struktūra ir pilna ar pašsaprotamu konvertēšanu, kas pārvērš DateTime uz noteiktu veidu. Metodes ir ToFileTime, ToLocalTime, ToLongDateString, ToBinary, ToLongTimeString, ToOADate, ToShortDateString, ToShortTimeString, ToString un ToUniversalTime.

Šeit mēs ņemsim C# piemēru, lai DateTime konvertētu uz noteiktu veidu.

 using System; using System. Collections; using System.Collections.Generic; using System. Linq; using System. Text; using System.Threading.Tasks; namespace ConsoleApp8 { class Program { static void Main(string[] args) { DateTime DOB = new DateTime(2020, 01, 22); Console.WriteLine('ToString: ' + DOB.ToString()); Console.WriteLine('ToBinary: ' + DOB.ToBinary()); Console.WriteLine('ToFileTime: ' + DOB.ToFileTime()); Console.WriteLine('ToLocalTime: ' + DOB.ToLocalTime()); Console.WriteLine('ToLongDateString: ' + DOB.ToLongDateString()); Console.WriteLine('ToLongTimeString: ' + DOB.ToLongTimeString()); Console.WriteLine('ToOADate: ' + DOB.ToOADate()); Console.WriteLine('ToShortDateString: ' + DOB.ToShortDateString()); Console.WriteLine('ToShortTimeString: ' + DOB.ToShortTimeString()); Console.WriteLine('ToUniversalTime: ' + DOB.ToUniversalTime()); } } } 

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