Geek asks and answers

Entity framework + annotation for verification

I want to use validation annotation. I already have a model implemented by entity infrastructure. I need data validation, and I know that there is a data announcement that is very nice ... But I really don’t know how I can use it with the correct entity structure.

Do I have to edit objects? Or should I write a separate class? Or should I write a class that inherits from entities?

Can you tell me what is the best use?

I want to write as little code as possible.

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2 answers

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, . , "", EF :

public partial class Setting : INotifyPropertyChanging, INotifyPropertyChanged
{
    // Auto-gen Properties, methods, etc go here.
}

, partial class Setting , EF , / . , :

  • MetadataType Setting. , , .

    [MetadataType(typeof(SettingMetadata))]   
public partial class Setting
{
}

  • , , EF, , . EF , , , .

    public class SettingMetadata
{
    [Display(Name="Base Rate")]
    [Required]
    public decimal Rate
    {
        get;
        set;
    }

    [Display(Name = "Permit Payments")]
    public Boolean AllowPayments
    {
        get;
        set;
    }

    [Display(Name = "Base URL For Web Service")]
    [Required]
    [SuppressMessage("Microsoft.Design", "CA1056:UriPropertiesShouldNotBeStrings", Justification = "Type must match linked metadata type.")]
    public string WebServiceUrl
    {
        get;
        set;
    }
}

FxCop, , .

+14

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.

+2

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