从UTC转换回UTC

Question

我正在处理一些来自世界各地的JSON日期，我收集的日期是UTC，但当我解析JSON数据时，它忽略了'Z'，它忘记了这是一个UTC日期，而且date kine是'local‘而不是'utc’，这很奇怪。似乎你需要传入CultureInfo.InvariantCulture，DateTimeStyles.AssumeUniversal | DateTimeStyles.AdjustToUniversal parts才能让它识别Z。所以，如果其他人遇到麻烦，试试这个吧。

        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

要观察的密钥位是

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