79 lines
2.7 KiB
C#
79 lines
2.7 KiB
C#
/*
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* Copyright (C) Alibaba Cloud Computing
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* All rights reserved.
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*
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* 版权所有 （C）阿里云计算有限公司
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*/
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using System;
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using System.Diagnostics;
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using System.Globalization;
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namespace Aliyun.Api.LOG.Common.Utilities
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{
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/// <summary>
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/// Description of DateUtils.
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/// </summary>
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public static class DateUtils
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{
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private static DateTime _1970StartDateTime = TimeZone.CurrentTimeZone.ToLocalTime(new System.DateTime(1970, 1, 1, 0, 0, 0, 0));
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private const string _rfc822DateFormat = "ddd, dd MMM yyyy HH:mm:ss \\G\\M\\T";
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private const string _iso8601DateFormat = "yyyy-MM-dd'T'HH:mm:ss.fff'Z'";
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/// <summary>
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/// Formats an instance of <see cref="DateTime" /> to a GMT string.
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/// </summary>
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/// <param name="dt">The date time to format.</param>
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/// <returns></returns>
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public static string FormatRfc822Date(DateTime dt)
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{
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return dt.ToUniversalTime().ToString(_rfc822DateFormat,
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CultureInfo.InvariantCulture);
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}
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/// <summary>
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/// Formats a GMT date string to an object of <see cref="DateTime" />.
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/// </summary>
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/// <param name="dt"></param>
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/// <returns></returns>
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public static DateTime ParseRfc822Date(String dt)
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{
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Debug.Assert(!string.IsNullOrEmpty(dt));
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return DateTime.SpecifyKind(
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DateTime.ParseExact(dt,
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_rfc822DateFormat,
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CultureInfo.InvariantCulture),
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DateTimeKind.Utc);
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}
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/// <summary>
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/// Formats a date to a string in the format of ISO 8601 spec.
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/// </summary>
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/// <param name="dt"></param>
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/// <returns></returns>
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public static string FormatIso8601Date(DateTime dt)
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{
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return dt.ToUniversalTime().ToString(_iso8601DateFormat,
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CultureInfo.CreateSpecificCulture("en-US"));
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}
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/// <summary>
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/// convert time stamp to DateTime.
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/// </summary>
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/// <param name="timeStamp">seconds</param>
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/// <returns></returns>
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public static DateTime GetDateTime(uint timeStamp)
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{
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DateTime dtStart = TimeZone.CurrentTimeZone.ToLocalTime(new DateTime(1970, 1, 1));
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long lTime = ((long)timeStamp * System.TimeSpan.TicksPerSecond);
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System.TimeSpan toNow = new System.TimeSpan(lTime);
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DateTime targetDt = dtStart.Add(toNow);
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return targetDt;
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}
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public static uint TimeSpan() {
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return (uint)Math.Round((DateTime.Now - _1970StartDateTime).TotalSeconds, MidpointRounding.AwayFromZero);
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}
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}
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}
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