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FilterableAttribute Class

Specifies whether the property to which the attribute is applied supports device filtering. This class cannot be inherited.

Namespace:  System.Web.UI
Assembly:  System.Web (in System.Web.dll)

[AspNetHostingPermissionAttribute(SecurityAction.LinkDemand, Level = AspNetHostingPermissionLevel.Minimal)]
public sealed class FilterableAttribute : Attribute

The FilterableAttribute attribute is applied to a property to specify whether the property supports device filtering. When a property supports device filtering, you can override the value of a property for a specific device by specifying a device filter. By default, properties are filterable, so a control developer could prevent device filtering on a property by setting the FilterableAttribute attribute to false. For more information, see Customizing ASP.NET Mobile Web Controls for Specific Devices.

For more information about using attributes, see Extending Metadata Using Attributes.

For a list of initial property values for an instance of the FilterableAttribute class, see the FilterableAttribute constructor.

The following code example demonstrates how to apply a FilterableAttribute attribute to a property of a custom control to indicate that the property does not support device filtering.

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Text;
using System.Web.UI;
using System.Web.UI.WebControls;

namespace Samples.AspNet.CS.Controls
    public class SimpleCustomControl : WebControl
        private string _productID;

        // Set Filterable attribute to specify that this 
        // property does not support device filtering.
        public string ProductID
                return _productID;
                _productID = value;


Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.

Windows 7, Windows Vista, Windows XP SP2, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP Starter Edition, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003, Windows Server 2000 SP4, Windows Millennium Edition, Windows 98

The .NET Framework and .NET Compact Framework do not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

.NET Framework

Supported in: 3.5, 3.0, 2.0