在C＃中解析阿拉伯日期？ [英] Parsing Arabic date in C#?

问题描述

我在解析日期时遇到问题，该程序被阿拉伯日期绊倒了。由于某些原因， DateTime.TryParse（）输出此文化的垃圾。这是说明我的问题的示例代码：

I ran into a problem parsing dates, the program got tripped up by Arabic dates. For some reason DateTime.TryParse() outputs garbage for this culture. Here is example code that illustrates my problem:

var culture = CultureInfo.CreateSpecificCulture("ar");

DateTime date;

if (DateTime.TryParse(
    "15/01/16",
    culture,
    DateTimeStyles.None,
    out date))
{
    Console.WriteLine("TryParse with Arabic culture: " + date);
}

if (DateTime.TryParseExact(
    "15/01/16",
    culture.DateTimeFormat.ShortDatePattern, // dd/MM/yy
    culture,
    DateTimeStyles.None,
    out date))
{
    Console.WriteLine("TryParseExact with Arabic short date pattern and culture: " + date);
}

if (DateTime.TryParseExact(
    "15/01/16",
    culture.DateTimeFormat.ShortDatePattern, // dd/MM/yy
    CultureInfo.InvariantCulture,
    DateTimeStyles.None,
    out date))
{
    Console.WriteLine("TryParseExact with Arabic short date pattern and invariant culture: " + date);
}

输出为：

TryParse with Arabic culture: 1995-06-13 00:00:00
TryParseExact with Arabic short date pattern and culture: 1995-06-13 00:00:00
TryParseExact with Arabic short date pattern and invariant culture: 2016-01-15 00:00:00

仅最后一个版本有效，我不知道为什么前两个版本失败。我可以理解 TryParse 失败的原因是，它无法确定使用哪种模式。但是在 TryParseExact 中，我指定了确切的格式，但仍然无法正确解析。我不知道为什么会这样。

Only the last version works, and I can't figure out why the first two versions fail. I could understand TryParse failing because it couldn't figure out which pattern to use; but in TryParseExact I specify the exact format, and it still fails to parse properly. I can't figure out why this happens.

推荐答案

第三个实际上不是阿拉伯语。这是一种与文化无关的文化，可以随时在任何.NET应用程序中使用。这就是为什么它在 TryParseExact 中返回当前日期时间值的原因。 参阅

The third one actually not arabic. it's a culture-insensitive culture which can be always use in any .NET application. That's why it's returning the current datetime value in TryParseExact. Refer

阿拉伯文化的默认日历未使用格里高利历。它使用农历（UmAlQuraCalendar）。因此，您的日期被视为农历，并转换回公历。

Arabic culture not using the Gregorian calendar for it's default calendar. It's using the Lunar calendar (UmAlQuraCalendar). So your date is considered as lunar date and converted back to Gregorian.

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