LookupBindingPropertiesAttribute.cs

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using System.Diagnostics.CodeAnalysis;
 
namespace System.ComponentModel;
 
[AttributeUsage(AttributeTargets.Class)]
public sealed class LookupBindingPropertiesAttribute : Attribute
{
    public static readonly LookupBindingPropertiesAttribute Default = new LookupBindingPropertiesAttribute();
 
    public string? DataSource { get; }
 
    public string? DisplayMember { get; }
 
    public string? ValueMember { get; }
 
    public string? LookupMember { get; }
 
    public LookupBindingPropertiesAttribute()
    {
        DataSource = null;
        DisplayMember = null;
        ValueMember = null;
        LookupMember = null;
    }
 
    public LookupBindingPropertiesAttribute(string dataSource, string displayMember, string valueMember, string lookupMember)
    {
        DataSource = dataSource;
        DisplayMember = displayMember;
        ValueMember = valueMember;
        LookupMember = lookupMember;
    }
 
    public override bool Equals([NotNullWhen(true)] object? obj)
    {
        if (obj is LookupBindingPropertiesAttribute lookupBindingPropertiesAttribute && lookupBindingPropertiesAttribute.DataSource == DataSource && lookupBindingPropertiesAttribute.DisplayMember == DisplayMember && lookupBindingPropertiesAttribute.ValueMember == ValueMember)
        {
            return lookupBindingPropertiesAttribute.LookupMember == LookupMember;
        }
        return false;
    }
 
    public override int GetHashCode()
    {
        return base.GetHashCode();
    }
}