将文化特定的枚举DisplayName字符串转换为枚举

Question

I've created a small application, which I am now in the process of defining culture specific text for the constants on each of the pages. I've been using a few Enum DropDownLists and have been using the Display(Name="Something") attribute for each of the Enum values for the string name to display.

Now that I'm using resource files to determine the text based on the culture I have had to change the attribute values to [Display(Name="SomeResourceValue", ResourceType=typeof(Resources.Resources))]

The issue I'm having is that I had a static method that takes the string DisplayName and returns the Enum value (providing the Enum type is supplied), which now doesn't work since introducing the resource files.

The method I'm trying to improve upon is as follows:

//Converts Enum DisplayName attribute text to it's Enum value 
    public static T GetEnumDisplayNameValue<T>(this string name)
    {
        var type = typeof(T);
        if (!type.IsEnum)
            throw new ArgumentException();
        FieldInfo[] fields = type.GetFields();
        var field = fields
                        .SelectMany(f => f.GetCustomAttributes(
                            typeof(DisplayAttribute), false), (
                                f, a) => new { Field = f, Att = a }).SingleOrDefault(a => ((DisplayAttribute)a.Att)
                            .Name == name);

        return field == null ? default(T) : (T)field.Field.GetRawConstantValue();
    }

If anyone could help me improve this to allow for a resource lookup I would be very grateful.

Answer 1

The working solution is as follows:

    public static T GetEnumDisplayNameValue<T>(this string name, CultureInfo culture)
    {
        var type = typeof(T);
        if (!type.IsEnum)
            throw new ArgumentException();
        FieldInfo[] fields = type.GetFields();

        var field = fields.SelectMany(f => f.GetCustomAttributes(typeof(DisplayAttribute), false),
            (f, a) => new { Field = f, Att = a })
            .SingleOrDefault(a => Resources.ResourceManager.GetString(((DisplayAttribute)a.Att).Name, culture) == name);

        return field == null ? default(T) : (T)field.Field.GetRawConstantValue();
    }