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//------------------------------------------------------------------------------
// <copyright file="IDReferencePropertyAttribute.cs" company="Microsoft">
// Copyright (c) Microsoft Corporation. All rights reserved.
// </copyright>
//------------------------------------------------------------------------------
namespace System.Web.UI
{
using System;
using System.Diagnostics.CodeAnalysis;
/// <devdoc>
/// An IDReferencePropertyAttribute metadata attribute can be applied to string properties
/// that contain ID references.
/// This can be used to identify ID reference properties which allows design-time functionality
/// to do interesting things with the property values.
/// </devdoc>
[AttributeUsage(AttributeTargets.Property)]
public sealed class IDReferencePropertyAttribute : Attribute
{
private Type _referencedControlType;
/// <devdoc>
/// </devdoc>
public IDReferencePropertyAttribute()
: this(typeof(Control))
{
}
/// <devdoc>
/// Used to mark a property as an ID reference. In addition, the type of controls
/// can be specified.
/// </devdoc>
public IDReferencePropertyAttribute(Type referencedControlType)
{
_referencedControlType = referencedControlType;
}
/// <devdoc>
/// The types of controls allowed by the property.
/// </devdoc>
public Type ReferencedControlType
{
get
{
return _referencedControlType;
}
}
/// <internalonly/>
[SuppressMessage("Microsoft.Usage", "CA2303:FlagTypeGetHashCode", Justification = "The types are Sytem.Web.UI.Control derived classes and not com interop types.")]
public override int GetHashCode()
{
return ((ReferencedControlType != null) ? ReferencedControlType.GetHashCode() : 0);
}
/// <internalonly/>
public override bool Equals(object obj)
{
if (obj == this)
{
return true;
}
IDReferencePropertyAttribute other = obj as IDReferencePropertyAttribute;
if (other != null)
{
return (ReferencedControlType == other.ReferencedControlType);
}
return false;
}
}
}
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