Imported Upstream version 4.0.0~alpha1

Former-commit-id: 806294f5ded97629b74c85c09952f2a74fe182d9

external/referencesource/System.Web/WebCategoryAttribute.cs

@@ -0,0 +1,60 @@
+//------------------------------------------------------------------------------
+// <copyright file="WebCategoryAttribute.cs" company="Microsoft">
+//     Copyright (c) Microsoft Corporation.  All rights reserved.
+// </copyright>                                                                
+//------------------------------------------------------------------------------
+
+/*
+ */
+namespace System.Web {
+
+    using System;
+    using System.ComponentModel;   
+    using System.Web.Util;
+
+
+    /// <internalonly/>
+    /// <devdoc>
+    ///    <para>
+    ///       CategoryAttribute that can access ASP.NET localized strings.
+    ///    </para>
+    /// </devdoc>
+    [AttributeUsage(AttributeTargets.All)]
+    internal sealed class WebCategoryAttribute : CategoryAttribute {
+
+
+        /// <devdoc>
+        ///    <para>
+        ///       Initializes a new instance of the <see cref='System.ComponentModel.CategoryAttribute'/> class.
+        ///    </para>
+        /// </devdoc>
+        internal WebCategoryAttribute(string category) : base(category) {
+        }
+
+        public override object TypeId {
+            get {
+                return typeof(CategoryAttribute);
+            }
+        }
+
+
+        /// <devdoc>
+        ///     This method is called the first time the category property
+        ///     is accessed.  It provides a way to lookup a localized string for
+        ///     the given category.  Classes may override this to add their
+        ///     own localized names to categories.  If a localized string is
+        ///     available for the given value, the method should return it.
+        ///     Otherwise, it should return null.
+        /// </devdoc>
+        protected override string GetLocalizedString(string value) {
+            string localizedValue = base.GetLocalizedString(value);
+            if (localizedValue == null) {
+                localizedValue = (string)SR.GetString("Category_" + value);
+            }
+            // This attribute is internal, and we should never have a missing resource string.
+            //
+            Debug.Assert(localizedValue != null, "All WebForms category attributes should have localized strings.  Category '" + value + "' not found.");
+            return localizedValue;
+        }
+    }
+}