Imported Upstream version 4.0.0~alpha1

Former-commit-id: 806294f5ded97629b74c85c09952f2a74fe182d9

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

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+//------------------------------------------------------------------------------
+// <copyright file="ValidatedControlConverter.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>
+    ///    <para> Filters and retrieves several types of values from validated controls.</para>
+    /// </devdoc>
+    public class ValidatedControlConverter: ControlIDConverter {        
+
+        /// <devdoc>
+        ///    <para>Determines whether a given control should have its id added to the StandardValuesCollection.</para>
+        /// </devdoc>
+        protected override bool FilterControl(Control control) {
+            ValidationPropertyAttribute valProp = (ValidationPropertyAttribute)TypeDescriptor.GetAttributes(control)[typeof(ValidationPropertyAttribute)];
+            return valProp != null && valProp.Name != null;
+        }
+    }    
+}