你如何保存从浏览器到服务器的 JavaScript 日期的时区，然后返回?

Don't rely on JavaScript's Date constructor to parse a string. The behavior and supported formats vary wildly per browser and locale. Here are just some of the default behaviors if you use the Date object directly.

如果您必须来自字符串，请尝试使用标准化格式，例如 ISO8601.您以该格式提供的日期将是 "2012-06-25T12:00:00".在 JavaScript 中使用这些最简单的方法是使用 moment.js.

If you must come from a string, try using a standardized format such as ISO8601. The date you gave in that format would be "2012-06-25T12:00:00". The easiest way to work with these in JavaScript is with moment.js.

另外，请注意您实际要表达的意思.现在，您正在传递本地日期/时间，保存本地/日期/时间，并返回本地日期/时间.在此过程中，本地"的概念可能会发生变化.

Also, be careful about what you are actually meaning to represent. Right now, you are passing a local date/time, saving a local/date/time, and returning a local date/time. Along the way, the idea of what is "local" could change.

在许多情况下，日期/时间旨在表示准确时刻.为此，您需要在客户端将输入的本地时间转换为 UTC.将 UTC 发送到您的服务器并存储它.稍后，检索 UTC 并将其发送回您的客户端，将其作为 UTC 处理并转换回本地时间.您可以使用 moment.js 轻松完成所有这些工作:

In many cases, the date/time is intended to represent an exact moment in time. To make that work, you need to convert from the local time entered to UTC on the client. Send UTC to your server, and store it. Later, retrieve UTC and send it back to your client, process it as UTC and convert back to local time. You can do all of this easily with moment.js:

// I'll assume these are the inputs you have.  Adjust accordingly.
var dateString = "6-25-2012";
var timeString = "12:00:00 PM";

// Construct a moment in the default local time zone, using a specific format.
var m = moment(dateString + " " + timeString, "M-D-YYYY h:mm:ss A");

// Get the value in UTC as an ISO8601 formatted string
var utc = m.toISOString(); // output: "2012-06-25T19:00:00.000Z"

在.Net的服务器上:

On the server in .Net:

var dt = DateTime.Parse("2012-06-25T19:00:00.000Z",   // from the input variable
                        CultureInfo.InvariantCulture, // recommended for ISO
                        DateTimeStyles.RoundtripKind) // honor the Z for UTC kind

将其存储在数据库中.稍后取回并发送回去:

Store that in the database. Later retrieve it and send it back:

// when you pull it from your database, set it to UTC kind
var dt = DateTime.SpecifyKind((DateTime)reader["yourfield"], DateTimeKind.Utc);

// send it back in ISO format:
var s = dt.ToString("o"); // "o" is the ISO8601 "round-trip" pattern.

将它传回moment.js中的javascript:

Pass it back to the javascript in moment.js:

// construct a moment:
var m = moment("2012-06-25T19:00:00.000Z"); // use the value from the server

// display it in this user's local time zone, in whatever format you want
var s = m.format("LLL");   // "June 25 2012 12:00 PM"

// or if you need a Date object
var dt = m.toDate();

看 - 这很容易，而且您无需对时区进行任何花哨的操作.

See - that was easy, and you didn't need to get into anything fancy with time zones.

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