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entity-framework-6xaf

Which reference for [Required]

In Dev Express Xaf, should I be using DevExpress.ExpressApp.Model.Required or System.ComponentModel.DataAnnotations.RequiredAttribute for the [Required] attribute inside my business classes?

[Later note] I should have clarified whether it was my intent to allow the attribute to be nullable. It turns out that If I don't want it to be nullable then I need the System.ComponentModel.DataAnnotations.RequiredAttribute

Solution

  • RuleRequiredFieldAttribute

    the full path being - DevExpress.Persistent.Validation.RuleRequiredFieldAttribute