CODEWITHSUNDEEP
c#cultureinfo
SergioKastro
SergioKastro

Reputation: 875

Wrapper for CultureInfo

I would like to create a wrapper class to replace the CultureInfo base class. For example; in my code I have

var cultureInfo = new CultureInfo (stringVariableForCultureName);

I would like to replace that line for this other: 

var cultureInfo = new CultureInfoWrapper (stringVariableForCultureName);

The reason is that I don't have control of the value passed to initialize the CultureInfo and I want to avoid the error exception defaulting the CultureInfo

So my CultureInfoWrapper constructor should be something like:

public CultureInfoWrapper(string cultureName)
{
    try
    {
        return new CultureInfo(cultureName);
    }
    catch (Exception exception)
    {   
        return new CultureInfo(DefaultCultureName);
    }
}

Can you help me to define the wrapper class?

Upvotes: 1

Views: 94

Answers (1)

Tim Schmelter
Tim Schmelter

Reputation: 460158

You could use this implementation, note that i've handled the CultureNotFoundException:

public class CultureInfoWrapper
{
    private readonly CultureInfo _cultureInfo;

    public CultureInfo Value
    {
        get { return _cultureInfo; }
    }

    public CultureInfoWrapper(string cultureName, string fallbackCultureName = "en-US")
    {
        try
        {
            _cultureInfo = new CultureInfo(cultureName);
        }
        catch (CultureNotFoundException)
        {
            _cultureInfo = new CultureInfo(fallbackCultureName);
        }
    }
}

Another approach would be to load all cultures once, then you can use this optimized version:

public class CultureInfoFinder
{
    private static readonly CultureInfo DefaultCulture = new CultureInfo("en-US");

    private static Dictionary<string, CultureInfo> _allSpecificCultures;

    static CultureInfoFinder()
    {
        _allSpecificCultures = CultureInfo.GetCultures(CultureTypes.SpecificCultures)
            .ToDictionary(c => c.ToString(), c => c, StringComparer.InvariantCultureIgnoreCase);
    }

    public static CultureInfo Get(string cultureName)
    {
        CultureInfo c;
        bool knownCulture = _allSpecificCultures.TryGetValue(cultureName, out c);
        return knownCulture ? c : DefaultCulture;
    }
}

For example:

CultureInfo deDE = CultureInfoFinder.Get("de-DE");

Upvotes: 5

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