添加项目文件。

Atomx.Utils/Extension/DateTimeExtension.cs

@@ -0,0 +1,188 @@
+namespace Atomx.Utils.Extension
+{
+    public static class DateTimeExtension
+    {
+        /// <summary>
+        /// 时间距离现在多久
+        /// </summary>
+        /// <param name="time"></param>
+        /// <returns></returns>
+        public static string DateFromNow(this DateTime time)
+        {
+            if (time == DateTime.MinValue)
+            {
+                return string.Empty;
+            }
+            TimeSpan timeSpan = DateTime.Now - time;
+            if (Math.Floor(timeSpan.TotalDays) > 365)
+            {
+                return Math.Floor(timeSpan.TotalDays) / 365 + "年前";
+            }
+            else if (Math.Floor(timeSpan.TotalDays) > 30)
+            {
+                return Math.Floor(timeSpan.TotalDays) / 30 + "月前";
+            }
+            else if (Math.Floor(timeSpan.TotalDays) > 7)
+            {
+                return Math.Floor(timeSpan.TotalDays) / 7 + "周前";
+            }
+            else if (Math.Floor(timeSpan.TotalDays) > 1)
+            {
+                return Math.Floor(timeSpan.TotalDays) + "天前";
+            }
+            else if (Math.Floor(timeSpan.TotalHours) > 1)
+            {
+                return Math.Floor(timeSpan.TotalHours) + "小时前";
+            }
+            else if (Math.Floor(timeSpan.TotalMinutes) > 1)
+            {
+                return Math.Floor(timeSpan.TotalMinutes) + "分钟前";
+            }
+            else
+            {
+                return Math.Floor(timeSpan.TotalSeconds) + "秒前";
+            }
+        }
+
+        /// <summary>
+        /// 字符串时间转换DateTime
+        /// </summary>
+        /// <param name="text"></param>
+        /// <returns></returns>
+        public static DateTime ToDateTime(this string text)
+        {
+            DateTime.TryParse(text, out DateTime time);
+            return time;
+        }
+
+        /// <summary>
+        /// 字符串时间转换DateTime
+        /// </summary>
+        /// <param name="text"></param>
+        /// <returns></returns>
+        public static DateTime ToUtcDateTime(this string text)
+        {
+            var state = DateTime.TryParse(text, out DateTime time);
+            if (state)
+            {
+                return DateTime.SpecifyKind(time, DateTimeKind.Utc);
+            }
+            return DateTime.MinValue;
+
+        }
+
+        /// <summary>
+        /// 获取当月第一天0时0分0秒
+        /// </summary>
+        /// <returns></returns>
+        public static DateTime GetMonthStartDate()
+        {
+            return DateTime.Now.AddDays(1 - DateTime.Now.Day).Date;
+        }
+
+        /// <summary>
+        /// 获取当月最后一天23时59分59秒
+        /// </summary>
+        /// <returns></returns>
+        public static DateTime GetMonthEndDate()
+        {
+            return DateTime.Now.AddDays(1 - DateTime.Now.Day).Date.AddMonths(1).AddSeconds(-1);
+        }
+
+        /// <summary>
+        /// 获取当前时间的周一开始时间
+        /// </summary>
+        /// <returns></returns>
+        public static DateTime GetWeekStartDate()
+        {
+            DateTime today = DateTime.Today;
+            return today.AddDays(-(int)today.DayOfWeek + (int)DayOfWeek.Monday).Date;
+        }
+
+        /// <summary>
+        /// 获取当前时间所在的周的最后一天结束时间
+        /// </summary>
+        /// <returns></returns>
+        public static DateTime GetWeekEndDate()
+        {
+            DateTime today = DateTime.Today;
+            return today.AddDays(-(int)today.DayOfWeek + (int)DayOfWeek.Monday).AddDays(7).AddSeconds(-1);
+        }
+
+        /// <summary>
+        /// 转换成每日开始时间
+        /// </summary>
+        /// <param name="time"></param>
+        /// <returns></returns>
+        public static DateTime ConvertStartDateTime(this DateTime time)
+        {
+            return time.Date;
+        }
+
+        /// <summary>
+        /// 转换成每日开始UTC时间
+        /// </summary>
+        /// <param name="time"></param>
+        /// <returns></returns>
+        public static DateTime ConvertStartDateUTCTime(this DateTime time)
+        {
+            return DateTime.SpecifyKind(time.Date, DateTimeKind.Utc);
+        }
+
+
+        /// <summary>
+        /// 转换成每日结束时间
+        /// </summary>
+        /// <param name="time"></param>
+        /// <returns></returns>
+        public static DateTime ConvertEndDateTime(this DateTime time)
+        {
+            return time.Date.AddDays(1).AddSeconds(-1);
+        }
+
+        /// <summary>
+        /// 转换成每日结束UTC时间
+        /// </summary>
+        /// <param name="time"></param>
+        /// <returns></returns>
+        public static DateTime ConvertEndDateUTCTime(this DateTime time)
+        {
+            return DateTime.SpecifyKind(time.Date.AddDays(1).AddSeconds(-1), DateTimeKind.Utc);
+        }
+
+        /// <summary>
+        /// long --> DateTime
+        /// </summary>
+        /// <param name="d"></param>
+        /// <returns></returns>
+        public static DateTime ConvertLongToDateTime(this long d)
+        {
+            DateTime dtStart = TimeZoneInfo.ConvertTimeToUtc(new DateTime(1970, 1, 1));
+            long lTime = long.Parse(d + "0000");
+            TimeSpan toNow = new TimeSpan(lTime);
+            DateTime dtResult = dtStart.Add(toNow);
+            return dtResult;
+        }
+
+        public static DateTime NumberToDateTime(this string number)
+        {
+            var year = number.Substring(0, 4);
+            //Console.WriteLine($"年：{year}");
+            var month = number.Substring(4, 2);
+            //Console.WriteLine($"月：{month}");
+            var day = number.Substring(6, 2);
+            //Console.WriteLine($"日：{day}");
+            var hour = number.Substring(8, 2);
+            //Console.WriteLine($"时：{hour}");
+            var minute = number.Substring(10, 2);
+            //Console.WriteLine($"分：{minute}");
+            var second = number.Substring(12);
+            //Console.WriteLine($"秒：{second}");
+
+            var datetime = $"{year}-{month}-{day} {hour}:{minute}:{second}";
+
+            DateTime date = DateTime.Parse(datetime);
+            return date;
+        }
+    }
+}