从UTC转换回来

Question

我正在处理来自世界各地的一些JSON日期，我以UTC形式收集日期但是，当我解析JSON数据时，它会忽略'Z'，它会忘记它的UTC日期，并且日期kine是'local'而不是'utc'，这很奇怪。似乎您需要传递CultureInfo.InvariantCulture，DateTimeStyles.AssumeUniversal | DateTimeStyles.AdjustToUniversal部分以使其识别Z。因此，以防万一其他人遭受了痛苦，请尝试一下。

        DateTime expected = System.DateTime.UtcNow;
        // var isoDate = new Date('yourdatehere').toISOString(); 
        string isoDate = expected.ToString("u").Replace(' ', 'T'); //  eg "2020-05-04T09:24:03Z   vs 2020-05-04T10:24:03 BST

        DateTime actual = DateTime.Parse(isoDate); // should process the Z as its a GMT date zulu - FAIL
        actual = DateTime.ParseExact(isoDate,
            "yyyy-MM-ddTHH:mm:ssZ",
            CultureInfo.InvariantCulture,
            DateTimeStyles.AssumeUniversal | DateTimeStyles.AdjustToUniversal);// PASS
        Assert.IsTrue(expected.Hour == actual.Hour, "Essential Parsing of zulu date");
        Assert.IsTrue(actual.Kind == DateTimeKind.Utc ,"surely It must have seen the Z?");

        Assert.AreEqual(expected  ,actual ,"Back where we started");

Answer 1

要观察的关键位是

  actual = DateTime.ParseExact(isoDate,
         "yyyy-MM-ddTHH:mm:ssZ",
        CultureInfo.InvariantCulture,
        DateTimeStyles.AssumeUniversal | DateTimeStyles.AdjustToUniversal );// PASS