Inject some dependency to an attribute

Question

I'm developing a multi-language web site. My solution for displaying multilanguage texts, based on following LocalizedDisplayAttribute class. I would like to inject some dependency to this class.But the class is instantiated by .Net Framework. How container inject dependency without using service locator?

Here is my code block

[AttributeUsage(AttributeTargets.All)]
public class LocalizedDisplayAttribute : DisplayNameAttribute
{
    public MultilanguageKeys Key { get; set; }
    public IMultilanguageManager MultilanguageManager { get; set; }              

    public LocalizedDisplayAttribute(IMultilanguageManager multilanguageManager)
    {
        this.MultilanguageManager = multilanguageManager;
    }

    public override string DisplayName
    {
        get
        {
         // Run some business   
         return GetCustomAttribute(Key);
        }
    }      

    private string GetCustomAttribute(MultilanguageKeys key)
    {
        int multiLanguageId = 3;            

        MultiLanguageDictionaryInfo multiLanguageDictionary = MultilanguageManager.DictionaryList()
                                                            .Where(t => t.Key == key.ToString())
                                                            .Where(t => t.MultilanguageId == multiLanguageId)
                                                            .FirstOrDefault();           

        return multiLanguageDictionary.Value;

    }

}

score 1 · Accepted Answer · edited May 23 '17 at 10:34

1

AS your mention, Attribute class is created by .NET framework, so I believe it's impossible to do dependency injection automatically, you need to inject this manually.

Use this solution to inject properties to constructed object:

Windsor castle Injecting properties of constructed object

edited May 23 '17 at 10:34

Community

1
1

answered Sep 11 '12 at 08:35

cuongle

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score 0 · Answer 2 · answered Sep 11 '12 at 08:41

You have to override the ControllerActionInvoker class and the InvokeActionMethodWithFilters method where you can use windsor to inject the dependencies on the instantiated objects

Edit: Realized this is for mvc, not sure how to go about it in a webforms environment

Inject some dependency to an attribute

2 Answers2