考虑到:
DateTime.UtcNow
我如何获得一个字符串，它表示在ISO 8601兼容的格式相同的值?
请注意，ISO 8601定义了许多类似的格式。我想要的具体格式是:
yyyy-MM-ddTHH:mm:ssZ
当前回答
Use:
private void TimeFormats()
{
DateTime localTime = DateTime.Now;
DateTime utcTime = DateTime.UtcNow;
DateTimeOffset localTimeAndOffset = new DateTimeOffset(localTime, TimeZoneInfo.Local.GetUtcOffset(localTime));
//UTC
string strUtcTime_o = utcTime.ToString("o");
string strUtcTime_s = utcTime.ToString("s");
string strUtcTime_custom = utcTime.ToString("yyyy-MM-ddTHH:mm:ssK");
//Local
string strLocalTimeAndOffset_o = localTimeAndOffset.ToString("o");
string strLocalTimeAndOffset_s = localTimeAndOffset.ToString("s");
string strLocalTimeAndOffset_custom = utcTime.ToString("yyyy-MM-ddTHH:mm:ssK");
//Output
Response.Write("<br/>UTC<br/>");
Response.Write("strUtcTime_o: " + strUtcTime_o + "<br/>");
Response.Write("strUtcTime_s: " + strUtcTime_s + "<br/>");
Response.Write("strUtcTime_custom: " + strUtcTime_custom + "<br/>");
Response.Write("<br/>Local Time<br/>");
Response.Write("strLocalTimeAndOffset_o: " + strLocalTimeAndOffset_o + "<br/>");
Response.Write("strLocalTimeAndOffset_s: " + strLocalTimeAndOffset_s + "<br/>");
Response.Write("strLocalTimeAndOffset_custom: " + strLocalTimeAndOffset_custom + "<br/>");
}
输出
UTC
strUtcTime_o: 2012-09-17T22:02:51.4021600Z
strUtcTime_s: 2012-09-17T22:02:51
strUtcTime_custom: 2012-09-17T22:02:51Z
Local Time
strLocalTimeAndOffset_o: 2012-09-17T15:02:51.4021600-07:00
strLocalTimeAndOffset_s: 2012-09-17T15:02:51
strLocalTimeAndOffset_custom: 2012-09-17T22:02:51Z
来源:
标准日期和时间格式字符串(MSDN) 自定义日期和时间格式字符串(MSDN)
其他回答
Use:
private void TimeFormats()
{
DateTime localTime = DateTime.Now;
DateTime utcTime = DateTime.UtcNow;
DateTimeOffset localTimeAndOffset = new DateTimeOffset(localTime, TimeZoneInfo.Local.GetUtcOffset(localTime));
//UTC
string strUtcTime_o = utcTime.ToString("o");
string strUtcTime_s = utcTime.ToString("s");
string strUtcTime_custom = utcTime.ToString("yyyy-MM-ddTHH:mm:ssK");
//Local
string strLocalTimeAndOffset_o = localTimeAndOffset.ToString("o");
string strLocalTimeAndOffset_s = localTimeAndOffset.ToString("s");
string strLocalTimeAndOffset_custom = utcTime.ToString("yyyy-MM-ddTHH:mm:ssK");
//Output
Response.Write("<br/>UTC<br/>");
Response.Write("strUtcTime_o: " + strUtcTime_o + "<br/>");
Response.Write("strUtcTime_s: " + strUtcTime_s + "<br/>");
Response.Write("strUtcTime_custom: " + strUtcTime_custom + "<br/>");
Response.Write("<br/>Local Time<br/>");
Response.Write("strLocalTimeAndOffset_o: " + strLocalTimeAndOffset_o + "<br/>");
Response.Write("strLocalTimeAndOffset_s: " + strLocalTimeAndOffset_s + "<br/>");
Response.Write("strLocalTimeAndOffset_custom: " + strLocalTimeAndOffset_custom + "<br/>");
}
输出
UTC
strUtcTime_o: 2012-09-17T22:02:51.4021600Z
strUtcTime_s: 2012-09-17T22:02:51
strUtcTime_custom: 2012-09-17T22:02:51Z
Local Time
strLocalTimeAndOffset_o: 2012-09-17T15:02:51.4021600-07:00
strLocalTimeAndOffset_s: 2012-09-17T15:02:51
strLocalTimeAndOffset_custom: 2012-09-17T22:02:51Z
来源:
标准日期和时间格式字符串(MSDN) 自定义日期和时间格式字符串(MSDN)
如果你在SharePoint 2010或更高版本下开发，你可以使用
using Microsoft.SharePoint;
using Microsoft.SharePoint.Utilities;
...
string strISODate = SPUtility.CreateISO8601DateTimeFromSystemDateTime(DateTime.Now)
像2018-06-22T13:04:16这样的格式可以在API的URI中传递:
public static string FormatDateTime(DateTime dateTime)
{
return dateTime.ToString("s", System.Globalization.CultureInfo.InvariantCulture);
}
DateTime.UtcNow.ToString("s")
返回类似2008-04-10T06:30:00的内容
UtcNow显然返回UTC时间，所以在以下情况下没有伤害:
string.Concat(DateTime.UtcNow.ToString("s"), "Z")
读者注意:一些评论指出了这个答案中的一些问题(特别是与第一个建议有关)。更多信息请参考评论部分。
DateTime.UtcNow.ToString("yyyy-MM-ddTHH\\:mm\\:ss.fffffffzzz", CultureInfo.InvariantCulture);
使用自定义日期-时间格式，这将为您提供类似于 2008 - 09 - 22 - t13:57:31.2311892内。
另一种方法是:
DateTime.UtcNow.ToString("o", CultureInfo.InvariantCulture);
它使用标准的“往返”风格(ISO 8601)来给你 2008 - 09 - 22 - t14:01:54.9571247z。
要获得指定的格式，您可以使用:
DateTime.UtcNow.ToString("yyyy-MM-ddTHH:mm:ssZ", CultureInfo.InvariantCulture)
