CODEWITHSUNDEEP
c#enums
Oren A
Oren A

Reputation: 5900

The type of an enum

I'm trying to make a generic method from this method: 

public static SelectList LanguagesToSelectList()
{
   return new SelectList(
        Enum.GetValues(typeof(Languages))
        .Cast<Languages>()
        .Select(g => new KeyValuePair<Languages, string>(
            g,
            Resources.Views_GamesAndApplications.ResourceManager.GetString("Language_" + g.ToString()
            )
        )), 
        "Key", 
        "Value"
        );
}

Here's what I got: 

public static SelectList ToSelectList(Enum enumType, ResourceManager resourceManager, string resourcePrefix)
{
    return new SelectList(
        Enum.GetValues(typeof(enumType))
        .Cast<enumType>()
        .Select(g => new KeyValuePair<enumType, string>(
            g,
            resourceManager.GetString(resourcePrefix + g.ToString())
            )), 
        "Key", 
        "Value");
}

However, enumType shouldn't be of type Enum (nor should it be of type Type), and I can't figure out of what type is SHOULD be, or if I should rephrase the entire method..

Usage example (compliant with given answer): 

@Html.DropDownListFor(
    m => m.Language,  
    SelectListHelper.ToSelectList<Languages>   
      (Resources.Views_GamesAndApplications.ResourceManager,"Language_"))

Thanks.

Upvotes: 0

Views: 168

Answers (1)

SeeSharp
SeeSharp

Reputation: 1750

public static SelectList ToSelectList<T>(ResourceManager resourceManager, string resourcePrefix)
    where T : struct 
{
    return new SelectList(Enum.GetValues(typeof(T)).Cast<T>()
                .Select(g => new KeyValuePair<T, string>(g, resourceManager.GetString(resourcePrefix + g.ToString()))), "Key", "Value");
}  

//Example:
var list = ToSelectList<Languages>(someResourceManager, "somePrefix");

Upvotes: 3

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