XAttributeValuePropertyDescriptor.cs

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using System;
using System.Xml.Linq;
 
namespace MS.Internal.Xml.Linq.ComponentModel;
 
internal sealed class XAttributeValuePropertyDescriptor : XPropertyDescriptor<XAttribute, string>
{
    private XAttribute _attribute;
 
    public override bool IsReadOnly => false;
 
    public XAttributeValuePropertyDescriptor()
        : base("Value")
    {
    }
 
    public override object GetValue(object component)
    {
        _attribute = component as XAttribute;
        if (_attribute == null)
        {
            return string.Empty;
        }
        return _attribute.Value;
    }
 
    public override void SetValue(object component, object value)
    {
        _attribute = component as XAttribute;
        if (_attribute != null)
        {
            _attribute.Value = value as string;
        }
    }
 
    protected override void OnChanged(object sender, XObjectChangeEventArgs args)
    {
        if (_attribute != null && args.ObjectChange == XObjectChange.Value)
        {
            OnValueChanged(_attribute, EventArgs.Empty);
        }
    }
}