83 lines
3.3 KiB
C#
83 lines
3.3 KiB
C#
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//------------------------------------------------------------------------------
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// <copyright file="MobileCategoryAttribute.cs" company="Microsoft">
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// Copyright (c) Microsoft Corporation. All rights reserved.
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// </copyright>
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//------------------------------------------------------------------------------
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namespace System.Web.UI.MobileControls
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{
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using System;
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using System.ComponentModel;
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using System.Diagnostics;
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[
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AttributeUsage(AttributeTargets.All)
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]
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[Obsolete("The System.Web.Mobile.dll assembly has been deprecated and should no longer be used. For information about how to develop ASP.NET mobile applications, see http://go.microsoft.com/fwlink/?LinkId=157231.")]
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internal sealed class MobileCategoryAttribute : CategoryAttribute
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{
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private static MobileCategoryAttribute deviceSpecific;
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private const String _categoryDeviceSpecific = "Category_DeviceSpecific";
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private const String _categoryPrefix = "Category_";
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private const String _usCategoryDeviceSpecific = "Device Specific";
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private static readonly int _prefixLength = _categoryPrefix.Length;
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// Initializes a new instance of the CategoryAttribute class.
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internal /*public*/ MobileCategoryAttribute(String category) : base(category)
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{
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}
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internal /*public*/ static CategoryAttribute DeviceSpecific
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{
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get
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{
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if (deviceSpecific == null)
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{
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deviceSpecific = new MobileCategoryAttribute(_categoryDeviceSpecific);
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}
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return deviceSpecific;
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}
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}
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// This method is called the first time the category property
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// is accessed. It provides a way to lookup a localized string for
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// the given category. Classes may override this to add their
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// own localized names to categories. If a localized string is
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// available for the given value, the method should return it.
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// Otherwise, it should return null.
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protected override String GetLocalizedString(String value)
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{
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Debug.Assert(value != null);
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String localizedValue = null;
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int index = value.IndexOf(_categoryPrefix, StringComparison.Ordinal);
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// mobile controls have "Category_" prefix.
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if (index == 0)
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{
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String categoryName = value.Substring(_prefixLength);
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// see if already defined in base class.
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localizedValue = base.GetLocalizedString(categoryName);
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}
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// fall back to local resource string.
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if (localizedValue == null)
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{
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localizedValue = (String) SR.GetString(value);
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}
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if (localizedValue == null && value.Equals(_usCategoryDeviceSpecific))
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{
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localizedValue = (String) SR.GetString(SR.Category_DeviceSpecific);
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}
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// This attribute is internal, and we should never have a missing resource string.
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Debug.Assert(localizedValue != null,
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"All MobileWebForms category attributes should have localized strings. Category '"
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+ value + "' not found.");
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return localizedValue;
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}
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}
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}
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