初始化项目

Services/Extensions/TimeExtensions.cs

@@ -0,0 +1,29 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace System
+{
+    public static class TimeExtensions
+    {
+        public static DateTime? ToDateTime(this string timeStamp)
+        {
+            long ticks = 0L;
+            if (long.TryParse(timeStamp, out ticks))
+            {
+                DateTime dateTime = TimeZone.CurrentTimeZone.ToLocalTime(new DateTime(1970, 1, 1));
+                TimeSpan value = new TimeSpan(ticks);
+                return new DateTime?(dateTime.Add(value));
+            }
+            DateTime now = DateTime.Now;
+            if (DateTime.TryParse(timeStamp, out now))
+            {
+                return new DateTime?(now);
+            }
+            return null;
+        }
+
+    }
+}