Imported Upstream version 4.6.0.125

Former-commit-id: a2155e9bd80020e49e72e86c44da02a8ac0e57a4

mcs/class/referencesource/System.Web/UI/WebControls/Substitution.cs

@@ -0,0 +1,127 @@
+//------------------------------------------------------------------------------
+// <copyright file="Substitution.cs" company="Microsoft">
+//     Copyright (c) Microsoft Corporation.  All rights reserved.
+// </copyright>
+//------------------------------------------------------------------------------
+
+namespace System.Web.UI.WebControls {
+
+    using System;
+    using System.ComponentModel;
+    using System.Globalization;
+    using System.Security.Permissions;
+    using System.Web;
+    using System.Web.UI;
+
+
+    /// <devdoc>
+    /// <para></para>
+    /// </devdoc>
+    [
+    DefaultProperty("MethodName"),
+    Designer("System.Web.UI.Design.WebControls.SubstitutionDesigner, " + AssemblyRef.SystemDesign),
+    ParseChildren(true),
+    PersistChildren(false),
+    ]
+    public class Substitution : Control {
+
+
+        /// <devdoc>
+        /// <para></para>
+        /// </devdoc>
+        public Substitution() {
+        }
+
+
+        /// <devdoc>
+        /// <para></para>
+        /// </devdoc>
+        [
+        DefaultValue(""),
+        WebCategory("Behavior"),
+        WebSysDescription(SR.Substitution_MethodNameDescr)
+        ]
+        public virtual string MethodName {
+            get {
+                string s = ViewState["MethodName"] as string;
+                return s == null? String.Empty : s;
+            }
+            set {
+                ViewState["MethodName"] = value;
+            }
+        }
+
+
+        protected override ControlCollection CreateControlCollection() {
+            return new EmptyControlCollection(this);
+        }
+
+        // SECURITY CODE 
+
+
+
+
+
+
+
+
+
+
+
+
+
+        // VSWhidbey 253188: Permission assert to support page running below full trust
+        [ReflectionPermission(SecurityAction.Assert, Flags=ReflectionPermissionFlag.MemberAccess)]
+        private HttpResponseSubstitutionCallback GetDelegate(Type targetType, string methodName) {
+            return (HttpResponseSubstitutionCallback)Delegate.CreateDelegate(
+                        typeof(HttpResponseSubstitutionCallback), targetType, methodName);
+        }
+
+        protected internal override void OnPreRender(EventArgs e) {
+            base.OnPreRender(e);
+
+            // VSWhidbey 84748: Temp fix, throw if we are within a cached control
+            Control parent = Parent;
+            while (parent != null) {
+                if (parent is BasePartialCachingControl) {
+                    throw new HttpException(
+                        SR.GetString(SR.Substitution_CannotBeInCachedControl));
+                }
+                parent = parent.Parent;
+            }
+        }
+
+
+        protected internal override void Render(HtmlTextWriter writer) {
+            RenderMarkup(writer);
+        }
+
+        internal void RenderMarkup(HtmlTextWriter writer) {
+            if (MethodName.Length == 0) {
+                return;
+            }
+
+            TemplateControl target = TemplateControl;
+            if (target == null) {
+                return;
+            }
+
+            // get the delegate to the method
+            HttpResponseSubstitutionCallback callback = null;
+
+            try {
+                 callback = GetDelegate(target.GetType(), MethodName);
+            }
+            catch {
+            }
+
+            if (callback == null) {
+                throw new HttpException(
+                    SR.GetString(SR.Substitution_BadMethodName, MethodName));
+            }
+
+            // add the substitution to the response
+            Page.Response.WriteSubstitution(callback);
+        }
+    }
+}