DKNet

Check attributes on types and properties

Part of DKNet.Fw.Extensions. Use AttributeExtensions to test for attributes without manually handling missing reflection metadata.

using System;
using System.ComponentModel.DataAnnotations;
using DKNet.Fw.Extensions.Reflection;

var item = new Item();
Console.WriteLine(item.HasAttributeOnProperty<RequiredAttribute>(nameof(Item.Name))); // True
Console.WriteLine(item.GetProperty(nameof(Item.Name)).HasAttribute<RequiredAttribute>()); // True
Console.WriteLine(typeof(Item).HasAttribute<SerializableAttribute>()); // False

public sealed class Item { [Required] public string Name { get; set; } = ""; }

HasAttributeOnProperty resolves the named property through GetProperty, then returns Attribute.IsDefined or false when metadata is missing.

HasAttribute<TAttribute> accepts a nullable Type or PropertyInfo. HasAttributeOnProperty<TAttribute> resolves the property with the default lookup from property access. All forms return false when their metadata lookup finds nothing.

⚙️ Configuration reference

Option	Type	Default	Effect
`inherit`	`bool`	`true`	Passed to `Attribute.IsDefined` to control inherited attribute lookup.

⚠️ Gotchas & limits

These methods check metadata presence; they do not execute validation attributes.
Assembly scanning’s HasAttribute disables inheritance and has no inherit option; these helpers default to true.

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