初始化

bin/aliyun-log-csharp-sdk-master/SLSSDK/Common/Utilities/DateUtils.cs

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