Question

My App is connected to Database and it captures the time which is displayed within application. All records have time of creation and date/time should be in EST because our users are working in different timezones.

因此,我的问题是,如何显示时间。如今,在无害环境技术中,则使用系统或超时技术。

现行法典:

   private void timer1_Tick(object sender, EventArgs e)
        {
            label2date_.Text = DateTime.Now.ToString("MM dd yy HH:mm");
         
        }

Answer 1

<>Explanation>

您可使用timeZoneInfo模块获取当前当地时间区的信息,并使用。 TimeZoneInfo.Converttime do the transformation from one timezone to another.

<><><>>>>

private void timer1_Tick(object sender, EventArgs e)
    {
    
        DateTime dtNow = DateTime.Now.ToLocalTime();
        // Define the time zone for your local time
        TimeZoneInfo localtz = TimeZoneInfo.Local;
        // Define the Eastern Standard Time (EST) zone
        TimeZoneInfo esttz = TimeZoneInfo.FindSystemTimeZoneById("Eastern Standard Time");
        // Convert local time to EST
        DateTime dtEST = TimeZoneInfo.ConvertTime(dtNow, localtz, esttz);
    
        Console.WriteLine("Local Time: " + dtNow.ToString("MM dd yy HH:mm"));
        Console.WriteLine("EST Time: " + dtEST.ToString("MM dd yy HH:mm"));
    
        label2date_.Text = dtEST.ToString("MM dd yy HH:mm");
    }

Answer 2

如果你想在网站上向用户展示当地时间,并能够支持多个时区<>,那么最好在后端代码中使用点时序,使用户代码(~javascript)能够翻译。

MS Learn has a section for translating time in the [Converting times between time zones](https://learn.microsoft.com/en-us/dotnet/standard/datetime/converting-between- time-zones#converting-utc-to-a-designated-time-zone) article.

例如:

DateTime utcNow = DateTime.UtcNow; // UTC, not local machine time var tz = TimeZoneInfo.FindSystemTimeZoneById("Central Standard Time"); // or Eastern etc. DateTime cstNow = TimeZoneInfo.ConvertTimeFromUtc(utcNow, tz); Console.WriteLine($"Utc: {utcNow}"); Console.WriteLine($"CST: {cstNow}");

produces:

Utc: 5/10/2023 2:49:19 AM CST: 4/10/2023 9:49:19 PM

同样,请指出,如果用户使用多个时区,这不会奏效。

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