MVC3 C# LocalizedRequiredAttribute not works

Question

I wrote this attribute extension:

public class LocalizedRequiredAttribute : RequiredAttribute
{
    public LocalizedRequiredAttribute(string resourceTag)
    {
        ErrorMessage = GetMessageFromResource(resourceTag);
    }

    private static String GetMessageFromResource(String resourceTag)
    {
        return ResourceManager.Current.GetResourceString(resourceTag);
    }
}

but I get this error: 'System.Resources.ResourceManager' does not contain a definition for 'Current'.

What is wrong?

Thanks a lot.

Answer 1

This can already be done using the RequiredAttribute

[Required(ErrorMessageResourceType=typeof(ClassLib1.Resources), ErrorMessageResourceName="Character_FirstName_Required")]

see Model Metadata and Validation Localization using Conventions

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EDIT: I Guess you're referencing the wrong ResourceManager, see ResourceManager.Current | current property

Answer 2

看起来您在定义此属性的文件中没有引用Windows.ApplicationModel.Resources.Core命名空间，因此VS明智地引用了System.Resources.Resource管理器。