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特定のカルチャでは、現在のスレッドのカルチャをそのカルチャに設定してから文字列を出力すると、 RFC1123形式のDateTimeに基づいて、DateTimeに変換しようとすると失敗します。最も頭が痛い失敗は、イタリアのマルティエのように、マルで始まる言葉に翻訳する曜日がある多くの文化に由来します。私は解析ルーチンが "mar"を見て、それが3月英語を意味し、すべてが失敗すると思うと仮定していますが、それはちょうど推測です。私が話している正確に何を記述するために私が知っている最良の方法は、コードを提供することです：C＃でRFC-1123の日付形式を使用し、火曜日の日付の構文解析の問題
using System;
using System.Globalization;
using System.Threading;
namespace RFC1123Test
{
class Program
{
static void Main(string[] args)
{
//list taken from http://msdn.microsoft.com/en-us/library/system.globalization.cultureinfo(v=vs.71).aspx
var culturesToTest = new string[] { String.Empty /*invariant culture*/, "af", "af-ZA",
"sq", "sq-AL", "ar", "ar-DZ", "ar-BH", "ar-EG", "ar-IQ", "ar-JO", "ar-KW",
"ar-LB", "ar-LY", "ar-MA", "ar-OM", "ar-QA", "ar-SA", "ar-SY", "ar-TN",
"ar-AE", "ar-YE", "hy", "hy-AM", "az", "az-AZ-Cyrl", "az-AZ-Latn", "eu", "eu-ES",
"be", "be-BY", "bg", "bg-BG", "ca", "ca-ES", "zh-HK", "zh-MO", "zh-CN", "zh-CHS",
"zh-SG", "zh-TW", "zh-CHT", "hr", "hr-HR", "cs", "cs-CZ", "da", "da-DK", "div",
"div-MV", "nl", "nl-BE", "nl-NL", "en", "en-AU", "en-BZ", "en-CA", "en-CB",
"en-IE", "en-JM", "en-NZ", "en-PH", "en-ZA", "en-TT", "en-GB", "en-US", "en-ZW",
"et", "et-EE", "fo", "fo-FO", "fa", "fa-IR", "fi", "fi-FI", "fr", "fr-BE", "fr-CA",
"fr-FR", "fr-LU", "fr-MC", "fr-CH", "gl", "gl-ES", "ka", "ka-GE", "de", "de-AT",
"de-DE", "de-LI", "de-LU", "de-CH", "el", "el-GR", "gu", "gu-IN", "he", "he-IL",
"hi", "hi-IN", "hu", "hu-HU", "is", "is-IS", "id", "id-ID", "it", "it-IT",
"it-CH", "ja", "ja-JP", "kn", "kn-IN", "kk", "kk-KZ", "kok", "kok-IN", "ko",
"ko-KR", "ky", "ky-KZ", "lv", "lv-LV", "lt", "lt-LT", "mk", "mk-MK", "ms",
"ms-BN", "ms-MY", "mr", "mr-IN", "mn", "mn-MN", "no", "nb-NO", "nn-NO", "pl",
"pl-PL", "pt", "pt-BR", "pt-PT", "pa", "pa-IN", "ro", "ro-RO", "ru", "ru-RU",
"sa", "sa-IN", "sr-SP-Cyrl", "sr-SP-Latn", "sk", "sk-SK", "sl", "sl-SI", "es",
"es-AR", "es-BO", "es-CL", "es-CO", "es-CR", "es-DO", "es-EC", "es-SV", "es-GT",
"es-HN", "es-MX", "es-NI", "es-PA", "es-PY", "es-PE", "es-PR", "es-ES", "es-UY",
"es-VE", "sw", "sw-KE", "sv", "sv-FI", "sv-SE", "syr", "syr-SY", "ta", "ta-IN",
"tt", "tt-RU", "te", "te-IN", "th", "th-TH", "tr", "tr-TR", "uk", "uk-UA", "ur",
"ur-PK", "uz", "uz-UZ-Cyrl", "uz-UZ-Latn", "vi", "vi-VN" };
//2:30 PM local time
var timeOfDayForTest = TimeSpan.FromHours(14).Add(TimeSpan.FromMinutes(30));
CultureInfo cultureForTest = null;
foreach (var culture in culturesToTest)
{
bool suitableForTest = true;
try
{
cultureForTest = new CultureInfo(culture);
Thread.CurrentThread.CurrentCulture = cultureForTest;
Thread.CurrentThread.CurrentUICulture = cultureForTest;
}
catch
{
suitableForTest = false;
}
if (suitableForTest)
{
//be sure to do a date for every day of the week
for (int i = 0; i < 7; i++)
{
runTest(cultureForTest, DateTime.Now.Date.Add(timeOfDayForTest).AddDays(i));
}
}
}
}
private static void runTest(CultureInfo culture, DateTime dt)
{
//string representation of RFC1123 pattern
string rfc1123Date = dt.ToUniversalTime().ToString(CultureInfo.CurrentCulture.DateTimeFormat.RFC1123Pattern);
bool parseFails = false;
DateTime parsedDt = DateTime.MinValue;
try
{
parsedDt = Convert.ToDateTime(rfc1123Date);
}
catch
{
parseFails = true;
}
if (parseFails)
{
Console.WriteLine(String.Format("ERROR: {0} [{1}] parse failed for [{2}].",
culture.Name, culture.NativeName, rfc1123Date));
}
else
{
if (parsedDt.Ticks == dt.Ticks)
{
//success!
//Console.WriteLine(String.Format("SUCCESS: {0} [{1}] worked just fine for {2}.",
//culture.Name, culture.NativeName, rfc1123Date));
}
else
{
Console.WriteLine(String.Format("ERROR: {0} [{1}] parsed successfully for {2} but parsed date does not match.",
culture.Name, culture.NativeName, rfc1123Date));
}
}
}
}
}
出力はこれです：
ERROR: af-ZA [Afrikaans (Suid Afrika)] parse failed for [Dins, 12 Jul 2011 18:30:00 GMT].
ERROR: af-ZA [Afrikaans (Suid Afrika)] parse failed for [Woen, 13 Jul 2011 18:30:00 GMT].
ERROR: af-ZA [Afrikaans (Suid Afrika)] parse failed for [Dond, 14 Jul 2011 18:30:00 GMT].
ERROR: af-ZA [Afrikaans (Suid Afrika)] parse failed for [Vry, 15 Jul 2011 18:30:00 GMT].
ERROR: af-ZA [Afrikaans (Suid Afrika)] parse failed for [Sat, 16 Jul 2011 18:30:00 GMT].
ERROR: af-ZA [Afrikaans (Suid Afrika)] parse failed for [Son, 17 Jul 2011 18:30:00 GMT].
ERROR: af-ZA [Afrikaans (Suid Afrika)] parse failed for [Maan, 18 Jul 2011 18:30:00 GMT].
ERROR: sq-AL [shqipe (Shqip‰ria)] parse failed for [Mar, 12 Kor 2011 18:30:00 GMT].
ERROR: sq-AL [shqipe (Shqip‰ria)] parse failed for [Sht, 16 Kor 2011 18:30:00 GMT].
ERROR: gl-ES [galego (galego)] parse failed for [mar, 12 xull 2011 18:30:00 GMT].
ERROR: it-IT [italiano (Italia)] parse failed for [mar, 12 lug 2011 18:30:00 GMT].
ERROR: it-CH [italiano (Svizzera)] parse failed for [mar, 12 lug 2011 18:30:00 GMT].
ERROR: it-CH [italiano (Svizzera)] parse failed for [gio, 14 lug 2011 18:30:00 GMT].
ERROR: ja-JP [??? (??)] parse failed for [?, 12 7 2011 18:30:00 GMT].
ERROR: ja-JP [??? (??)] parse failed for [?, 13 7 2011 18:30:00 GMT].
ERROR: ja-JP [??? (??)] parse failed for [?, 14 7 2011 18:30:00 GMT].
ERROR: ja-JP [??? (??)] parse failed for [?, 15 7 2011 18:30:00 GMT].
ERROR: ja-JP [??? (??)] parse failed for [?, 16 7 2011 18:30:00 GMT].
ERROR: ja-JP [??? (??)] parse failed for [?, 17 7 2011 18:30:00 GMT].
ERROR: ja-JP [??? (??)] parse failed for [?, 18 7 2011 18:30:00 GMT].
ERROR: ko-KR [??? (????)] parse failed for [?, 12 7 2011 18:30:00 GMT].
ERROR: ko-KR [??? (????)] parse failed for [?, 13 7 2011 18:30:00 GMT].
ERROR: ko-KR [??? (????)] parse failed for [?, 14 7 2011 18:30:00 GMT].
ERROR: ko-KR [??? (????)] parse failed for [?, 15 7 2011 18:30:00 GMT].
ERROR: ko-KR [??? (????)] parse failed for [?, 16 7 2011 18:30:00 GMT].
ERROR: ko-KR [??? (????)] parse failed for [?, 17 7 2011 18:30:00 GMT].
ERROR: ko-KR [??? (????)] parse failed for [?, 18 7 2011 18:30:00 GMT].
ERROR: es-AR [Espa¤ol (Argentina)] parse failed for [mar, 12 jul 2011 18:30:00 GMT].
ERROR: es-BO [Espa¤ol (Bolivia)] parse failed for [mar, 12 jul 2011 18:30:00 GMT].
ERROR: es-CL [Espa¤ol (Chile)] parse failed for [mar, 12 jul 2011 18:30:00 GMT].
ERROR: es-CO [Espa¤ol (Colombia)] parse failed for [mar, 12 jul 2011 18:30:00 GMT].
ERROR: es-CR [Espa¤ol (Costa Rica)] parse failed for [mar, 12 jul 2011 18:30:00 GMT].
ERROR: es-DO [Espa¤ol (Rep£blica Dominicana)] parse failed for [mar, 12 jul 2011 18:30:00 GMT].
ERROR: es-EC [Espa¤ol (Ecuador)] parse failed for [mar, 12 jul 2011 18:30:00 GMT].
ERROR: es-SV [Espa¤ol (El Salvador)] parse failed for [mar, 12 jul 2011 18:30:00 GMT].
ERROR: es-GT [Espa¤ol (Guatemala)] parse failed for [mar, 12 jul 2011 18:30:00 GMT].
ERROR: es-HN [Espa¤ol (Honduras)] parse failed for [mar, 12 jul 2011 18:30:00 GMT].
ERROR: es-MX [Espa¤ol (M‚xico)] parse failed for [mar, 12 jul 2011 18:30:00 GMT].
ERROR: es-NI [Espa¤ol (Nicaragua)] parse failed for [mar, 12 jul 2011 18:30:00 GMT].
ERROR: es-PA [Espa¤ol (Panam )] parse failed for [mar, 12 jul 2011 18:30:00 GMT].
ERROR: es-PY [Espa¤ol (Paraguay)] parse failed for [mar, 12 jul 2011 18:30:00 GMT].
ERROR: es-PE [Espa¤ol (Per£)] parse failed for [mar, 12 jul 2011 18:30:00 GMT].
ERROR: es-PR [Espa¤ol (Puerto Rico)] parse failed for [mar, 12 jul 2011 18:30:00 GMT].
ERROR: es-ES [espa¤ol (Espa¤a)] parse failed for [mar, 12 jul 2011 18:30:00 GMT].
ERROR: es-UY [Espa¤ol (Uruguay)] parse failed for [mar, 12 jul 2011 18:30:00 GMT].
ERROR: es-VE [Espa¤ol (Republica Bolivariana de Venezuela)] parse failed for [mar, 12 jul 2011 18:30:00 GMT].
だから私の質問は、なぜ、このコードにはない、あります作業？
あなたが提供したコードはコンパイルされませんが、 の行。parsedDt = DateTime.ParseExact（rfc1123Date、CultureInfo.CurrentCulture.DateTimeFormat.RFC1123Pattern、CultureInfo.CurrentCulture）.ToLocalTime（）; そのコードは私のテストで成功しています。ありがとう！ –