/// <summary>Gets the <see cref="System.String"/> representation of a specific enumeration item.
/// </summary>
/// <param name="value">The element of a specific enumeration.</param>
/// <param name="resourceManager">The resource manager, perhaps <c>null</c> if no resource manager is available for <paramref name="value"/>.</param>
/// <returns>The <see cref="System.String"/> representation of <paramref name="value"/> taken into account the <paramref name="resourceManager"/>,
/// i.e. <see cref="LanguageStringAttribute"/> if != <c>null</c>; otherwise <see cref="StringAttribute"/> is used if available;
/// otherwise the return value of the <c>ToString()</c> method of <paramref name="value"/> will be returned.</returns>
private static string GetFormatString(TEnum value, ResourceManager resourceManager)
{
if (resourceManager != null) // try language dependent string representation
{
LanguageStringAttribute languageStringAttribute = EnumAttribute.Create <LanguageStringAttribute>(value);
if (languageStringAttribute != null)
{
return(IdentifierString.GetIDString(resourceManager.GetString(languageStringAttribute.ResourcePropertyName, Thread.CurrentThread.CurrentUICulture), false));
}
}
StringAttribute stringAttribute = EnumAttribute.Create <StringAttribute>(value);
if (stringAttribute != null)
{
return(IdentifierString.GetIDString(stringAttribute.StringRepresentation, false));
}
return(IdentifierString.GetIDString(value.ToString(), false));
}
/// <summary>Gets a <see cref="System.String"/> representation that takes into account <see cref="LanguageResourceAttribute"/>,
/// <see cref="LanguageStringAttribute"/> or <see cref="StringAttribute"/>; if available.
/// </summary>
/// <param name="value">The value.</param>
/// <param name="enumStringRepresentationUsage">The method how to compute the <see cref="System.String"/> representation.</param>
/// <returns>A <see cref="System.String"/> representation of <paramref name="value"/> with respect to <paramref name="enumStringRepresentationUsage"/>, i.e.
/// <see cref="LanguageResourceAttribute"/>, <see cref="LanguageStringAttribute"/>, <see cref="StringAttribute"/>
/// or the <c>ToString()</c> method is used to generate the string representation.</returns>
public static string ToFormatString(this Enum value, EnumStringRepresentationUsage enumStringRepresentationUsage = EnumStringRepresentationUsage.LanguageStringAttribute)
{
if (enumStringRepresentationUsage == EnumStringRepresentationUsage.ToStringMethod)
{
return(value.ToString());
}
else if (enumStringRepresentationUsage == EnumStringRepresentationUsage.StringAttribute)
{
if (Enum.IsDefined(value.GetType(), value) == true)
{
StringAttribute stringAttribute = EnumAttribute.Create <StringAttribute>(value);
if (stringAttribute != null)
{
return(stringAttribute.StringRepresentation);
}
return(value.ToString());
}
else // is a flag, i.e. a|b|c etc. which is not a member of the enumeration, but perhaps 'b|c' is in the enumeration!
{
StringBuilder strBuilder = new StringBuilder();
foreach (Enum enumValue in GetEnumComponents(value))
{
if (strBuilder.Length > 0)
{
strBuilder.Append(EnumString.FlagsEnumSeparatorChar);
}
StringAttribute stringAttribute = EnumAttribute.Create <StringAttribute>(enumValue);
if (stringAttribute != null)
{
strBuilder.Append(stringAttribute.StringRepresentation);
}
else
{
strBuilder.Append(enumValue.ToString());
}
}
return(strBuilder.ToString());
}
}
// otherwise take into account a language depended string representation, if available:
Type enumType = value.GetType();
LanguageResourceAttribute languageResourceFile = Attribute.GetCustomAttribute(enumType, typeof(LanguageResourceAttribute)) as LanguageResourceAttribute;
if (Enum.IsDefined(value.GetType(), value) == true)
{
if (languageResourceFile != null)
{
LanguageStringAttribute languageStringAttribute = EnumAttribute.Create <LanguageStringAttribute>(value);
if (languageStringAttribute != null)
{
ResourceManager resourceManager = new ResourceManager(languageResourceFile.FullResourceName, enumType.Assembly);
return(resourceManager.GetString(languageStringAttribute.ResourcePropertyName, Thread.CurrentThread.CurrentUICulture));
}
}
StringAttribute stringAttribute = EnumAttribute.Create <StringAttribute>(value);
if (stringAttribute != null)
{
return(stringAttribute.StringRepresentation);
}
}
else // the enumeration is some [Flag] and only the parts contains a attribute but not the bitwise combination; we use ',' as separator
{
StringBuilder strBuilder = new StringBuilder();
foreach (Enum enumValue in GetEnumComponents(value))
{
if (strBuilder.Length > 0)
{
strBuilder.Append(EnumString.FlagsEnumSeparatorChar);
}
if (languageResourceFile != null)
{
LanguageStringAttribute languageStringAttribute = EnumAttribute.Create <LanguageStringAttribute>(enumValue);
if (languageStringAttribute != null)
{
ResourceManager resourceManager = new ResourceManager(languageResourceFile.FullResourceName, enumType.Assembly);
strBuilder.Append(resourceManager.GetString(languageStringAttribute.ResourcePropertyName, Thread.CurrentThread.CurrentUICulture));
continue; // to to next enumValue
}
}
StringAttribute stringAttribute = EnumAttribute.Create <StringAttribute>(enumValue);
if (stringAttribute != null)
{
strBuilder.Append(stringAttribute.StringRepresentation);
}
else
{
strBuilder.Append(enumValue.ToString());
}
}
return(strBuilder.ToString());
}
return(value.ToString());
}
