Одна из проблем, с перевод/локализация перечислений состоит в том, что вам нужно не только перевести их, но и проанализировать переводы обратно на значение перечисления. Следующий файл C# содержит то, как я преодолел проблемы двухсторонних переводов перечислений. Простите чрезмерные комментарии, но я действительно получаю довольно многословную информацию о своих творениях.
//
// EnumExtensions.cs
//
using System;
using System.Collections.Generic;
namespace EnumExtensionsLibrary
{
/// <summary>
/// The functions in this class use the localized strings in the resources
/// to translate the enum value when output to the UI and reverse--
/// translate when receiving input from the UI to store as the actual
/// enum value.
/// </summary>
///
/// <Note>
/// Some of the exported functions assume that the ParserEnumLocalizationHolder
/// and ToStringEnumLocalizationHolder dictionaries (maps) may contain the enum
/// types since they callthe Initialize methods with the input type before executing.
/// </Note>
public static class EnumExtensions
{
#region Exported methods
/// <summary>
/// Save resource from calling project so that we can look up enums as needed.
/// </summary>
/// <param name="resourceManager">Where we fish the translated strings from</param>
/// <remarks>
/// We do not have access to all of the resources from the other projects directly,
/// so they must be loaded from the code from within the project.
/// </remarks>
public static void RegisterResource(System.Resources.ResourceManager resourceManager)
{
if (!MapOfResourceManagers.Contains(resourceManager))
MapOfResourceManagers.Add(resourceManager);
}
/// <summary>
/// Parses the localized string value of the enum by mapping it
/// to the saved enum value
/// </summary>
/// <remarks>
/// In some cases, string for enums in the applications may not be translated to the
/// localized version (usually when the program presets parameters). If the enumMap
/// doesn't contain the value string, we call to Enum.Parse() to handle the conversion
/// or throw an exception.
/// </remarks>
/// <typeparam name="T"></typeparam>
/// <param name="value"></param>
/// <exception cref="ArgumentNullException"> enumType or value is null.</exception>
/// <exception cref="ArgumentException"> enumType is not an Enum. value is either an
/// empty string or only contains white space, value is a name, but not one of the
/// named constants defined for the enumeration.</exception>
/// <exception cref="ArgumentNullException">enumType or value is null.</exception>
/// <returns>
/// The enum value that matched the input string if found. If not found, we call
/// Enum.Parse to handle the value.
/// </returns>
public static T ParseEnum<T>(this string value) where T : struct
{
ParserInitialize(typeof(T));
var enumMap = ParserEnumLocalizationHolder[typeof(T)];
if (enumMap.ContainsKey(value))
return (T) enumMap[value];
return (T)Enum.Parse(typeof(T), value);
}
/// <summary>
/// Parses the localized string value of the enum by mapping it
/// to the saved enum value.
/// </summary>
/// <remarks>
/// In some cases, string for enums in the applications may not be translated to the
/// localized version (usually when the program presets parameters). If the enumMap
/// doesn't contain the value string, we call to Enum.TryParse() to handle the
/// conversion. and return.
/// </remarks>
/// <typeparam name="T"></typeparam>
/// <param name="value"></param>
/// <param name="result"></param>
/// <returns>
/// Returns true if the enum mapping contains the localized string value and the data
/// in the returned result parameter will be a valid value of that enum type. if the
/// string value is not mapped, then calls Enum.TryParse to handle the conversion and
/// return result.
/// </returns>
public static bool TryParseEnum<T>(this string value, out T result) where T : struct
{
ParserInitialize(typeof(T));
var enumMap = ParserEnumLocalizationHolder[typeof(T)];
if (!enumMap.ContainsKey(value))
return Enum.TryParse(value, out result);
result = (T)enumMap[value];
return true;
}
/// <summary>
/// Converts the enum value to a localized string.
/// </summary>
/// <typeparam name="T">must be an enum to work</typeparam>
/// <param name="value">is an enum</param>
/// <returns>
/// The localized string equivalent of the input enum value
/// </returns>
public static string EnumToString<T>(this T value) where T : struct
{
ToStringInitialize(typeof(T));
var toStringMap = ToStringEnumLocalizationHolder[typeof(T)];
return toStringMap.ContainsKey(value) ? toStringMap[value] : value.ToString();
//return EnumDescription(value);
}
/// <summary>
/// Gathers all of the localized translations for each
/// value of the input enum type into an array
/// </summary>
/// <remarks>
/// The return array from Type.GetEnumValues(), the array elements are sorted by
/// the binary values (that is, the unsigned values) of the enumeration constants.
/// </remarks>
/// <param name="enumType"></param>
/// <exception cref="ArgumentException"> The current type is not an enumeration.</exception>
/// <returns>
/// A string array with the localized strings representing
/// each of the values of the input enumType.
/// </returns>
public static string[] AllDescription(this Type enumType)
{
ToStringInitialize(enumType);
var descriptions = new List<string>();
var values = enumType.GetEnumValues();
var toStringMap = ToStringEnumLocalizationHolder[enumType];
foreach (var value in values)
{
descriptions.Add(toStringMap.ContainsKey(value) ? toStringMap[value] : value.ToString());
}
return descriptions.ToArray();
}
#endregion
#region Helper methods
/// <summary>
/// Translates an enum value into its localized string equivalent
/// </summary>
/// <remarks>
/// This assumes that the "name" for the localized string in the
/// resources will look like "enum-type-name""value". For example,
/// if I have an enum setup as:
///
/// enum Days {Sat, Sun, Mon, Tue, Wed, Thu, Fri};
///
/// the value "Sun" in the enum must have the name: "DaysSun"
/// in the resources. The localized (translated) string will
/// be in the value field. E.g.,
///
/// <data name="DaysSun" xml:space="preserve">
/// <value>Sunday</value>
/// </data>
///
/// 2nd note: there may be multiple resources to pull from.
/// Will look in each resource until we find a match or
/// return null.
/// </remarks>
/// <typeparam name="T"></typeparam>
/// <param name="enumType">the enum type</param>
/// <param name="value">the specific enum value</param>
/// <returns>
/// If the enum value is found in the resources, then return
/// that string. If not, then return null.
/// </returns>
private static string LocalEnumDescription<T>(Type enumType, T value)
{
foreach (var resourceManager in MapOfResourceManagers)
{
// The following live line uses string interpolation to perform:
//var rk = string.Format("{0}{1}", enumType.Name, value);
var rk = $"{enumType.Name}{value}";
// Given the above string formatting/interpolation, neither the enum.Name
// nor the value will have a '.' so we do not have to remove it.
var result = resourceManager.GetString(rk);
if (!string.IsNullOrEmpty(result))
return result;
}
return null;
}
/// <summary>
/// Initializes the mapping of the enum type to its mapping of localized strings to
/// the enum's values.
/// </summary>
/// <remarks>
/// The reason for each enum type to have a mapping from the localized string back
/// to its values is for ParseEnum and TryParseEnum to quickly return a value rather
/// than doing a lengthy loop comparing each value in the resources.
///
/// Also, we only map the corresponding resource string if it exists in the resources.
/// If not in the resources, then we call the Enum methods Parse() and TryParse() to
/// figure the results and throw the appropriate exception as needed.
/// </remarks>
///
/// <param name="enumType"></param>
private static void ParserInitialize(Type enumType)
{
if (!ParserEnumLocalizationHolder.ContainsKey(enumType))
{
var values = enumType.GetEnumValues(); // See remark for AllDescription().
var enumMap = new Dictionary<string, object>();
foreach (var value in values)
{
var description = LocalEnumDescription(enumType, value);
if (description != null)
enumMap[description] = value;
}
ParserEnumLocalizationHolder[enumType] = enumMap;
}
}
/// <summary>
/// Initializes the mapping of the enum type to its mapping of the enum's values
/// to their localized strings.
/// </summary>
/// <remarks>
/// The reason for each enum type to have a mapping from the localized string to its
/// values is for AllDescription and EnumToString to quickly return a value rather
/// than doing a lengthy loop runing through each of the resources.
///
/// Also, we only map the corresponding resource string if it exists in the resources.
/// See the EnumDescription method for more information.
/// </remarks>
///
/// <param name="enumType"></param>
private static void ToStringInitialize(Type enumType)
{
if (!ToStringEnumLocalizationHolder.ContainsKey(enumType))
{
var values = enumType.GetEnumValues(); // See remark for AllDescription().
var enumMap = new Dictionary<object, string>();
foreach (var value in values)
{
var description = LocalEnumDescription(enumType, value);
if (description != null)
enumMap[value] = description;
}
ToStringEnumLocalizationHolder[enumType] = enumMap;
}
}
#endregion
#region Data
private static readonly List<System.Resources.ResourceManager> MapOfResourceManagers =
new List<System.Resources.ResourceManager>();
private static readonly Dictionary<Type, Dictionary<string, object>> ParserEnumLocalizationHolder =
new Dictionary<Type, Dictionary<string, object>>();
private static readonly Dictionary<Type, Dictionary<object, string>> ToStringEnumLocalizationHolder =
new Dictionary<Type, Dictionary<object, string>>();
#endregion
}
}
Это не требует атрибута впереди каждое значение перечисления, но требует, чтобы имя атрибут вашей переведенных перечислений строки в ресурсах форматируются таким образом, что это конкатенация-имя-типа перечислений и значение перечисления. См. Комментарий выше метода LocalEnumDescription для получения дополнительной информации. Кроме того, он сохраняет переводы перечислений (как вперед, так и назад) путем отображения их переводов таким образом, что нам не нужно искать перевод каждый раз, когда мы сталкиваемся с значением перечисления.
Надеюсь, его достаточно просто понять и использовать.
Вы имеете в виду, используя значения, которые могут быть объединены с поразрядными операций, как [это] (http://stackoverflow.com/questions/8447/ перечисляемые-флаги-атрибутов)? –
@ChrisSinclair, нет, я имею в виду для перевода в представлении. Описание перечислений сохраняется в файле ресурсов. – Quoter
Возможный дубликат [Как использовать локализацию в C#] (http://stackoverflow.com/questions/1142802/how-to-use-localization-in-c-sharp) – MikeT