Imported Upstream version 4.0.0~alpha1

Former-commit-id: 806294f5ded97629b74c85c09952f2a74fe182d9

external/referencesource/System.Web/UI/WebControls/TargetConverter.cs

@@ -0,0 +1,56 @@
+//------------------------------------------------------------------------------
+// <copyright file="TargetConverter.cs" company="Microsoft">
+//     Copyright (c) Microsoft Corporation.  All rights reserved.
+// </copyright>                                                                
+//------------------------------------------------------------------------------
+
+namespace System.Web.UI.WebControls {
+
+    using System.Collections;
+    using System.ComponentModel;
+    using System.Globalization;
+    using System.Reflection;   
+
+    /// <devdoc>
+    /// </devdoc>
+    public class TargetConverter: StringConverter {
+
+        private static string []  targetValues = {
+            "_blank", 
+            "_parent", 
+            "_search", 
+            "_self", 
+            "_top"
+        };
+
+        private StandardValuesCollection values;
+
+
+        /// <internalonly/>
+        /// <devdoc>
+        /// </devdoc>
+        public override StandardValuesCollection GetStandardValues(ITypeDescriptorContext context) {
+            if (values == null) {
+                values = new StandardValuesCollection(targetValues);
+            }
+            return values;            
+        }
+
+
+        /// <internalonly/>
+        /// <devdoc>
+        /// </devdoc>
+        public override bool GetStandardValuesExclusive(ITypeDescriptorContext context) {
+            return false;
+        }
+
+
+        /// <internalonly/>
+        /// <devdoc>
+        /// </devdoc>
+        public override bool GetStandardValuesSupported(ITypeDescriptorContext context) {
+            return true;
+        }        
+
+    }    
+}