DataRelationPropertyDescriptor.cs

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using System.ComponentModel;
using System.Diagnostics.CodeAnalysis;
 
namespace System.Data;
 
internal sealed class DataRelationPropertyDescriptor : PropertyDescriptor
{
    internal DataRelation Relation { get; }
 
    public override Type ComponentType => typeof(DataRowView);
 
    public override bool IsReadOnly => false;
 
    public override Type PropertyType => typeof(IBindingList);
 
    internal DataRelationPropertyDescriptor(DataRelation dataRelation)
        : base(dataRelation.RelationName, null)
    {
        Relation = dataRelation;
    }
 
    public override bool Equals([NotNullWhen(true)] object other)
    {
        if (other is DataRelationPropertyDescriptor)
        {
            DataRelationPropertyDescriptor dataRelationPropertyDescriptor = (DataRelationPropertyDescriptor)other;
            return dataRelationPropertyDescriptor.Relation == Relation;
        }
        return false;
    }
 
    public override int GetHashCode()
    {
        return Relation.GetHashCode();
    }
 
    public override bool CanResetValue(object component)
    {
        return false;
    }
 
    public override object GetValue(object component)
    {
        DataRowView dataRowView = (DataRowView)component;
        return dataRowView.CreateChildView(Relation);
    }
 
    public override void ResetValue(object component)
    {
    }
 
    public override void SetValue(object component, object value)
    {
    }
 
    public override bool ShouldSerializeValue(object component)
    {
        return false;
    }
}