Imported Upstream version 4.6.0.125

Former-commit-id: a2155e9bd80020e49e72e86c44da02a8ac0e57a4

mcs/class/referencesource/System.Web.Extensions/ui/WebControls/ContextDataSource.cs

@@ -0,0 +1,58 @@
+namespace System.Web.UI.WebControls {
+    using System;
+    using System.Collections.Generic;
+    using System.ComponentModel;
+    using System.Text;
+
+    public abstract class ContextDataSource : QueryableDataSource {
+        private ContextDataSourceView _view;        
+
+        internal ContextDataSource(IPage page)
+            : base(page) {
+
+        }        
+
+        internal ContextDataSource(ContextDataSourceView view)
+            : base(view) {
+        }
+
+        protected ContextDataSource() {
+        }
+
+        private ContextDataSourceView View {
+            get {
+                if (_view == null) {
+                    _view = (ContextDataSourceView)GetView("DefaultView");
+                }
+                return _view;
+            }
+        }
+
+        public virtual string ContextTypeName {
+            get {
+                return View.ContextTypeName;
+            }
+            set {
+                View.ContextTypeName = value;
+            }
+        }
+
+        protected string EntitySetName {
+            get {
+                return View.EntitySetName;
+            }
+            set {
+                View.EntitySetName = value;
+            }
+        }
+
+        public virtual string EntityTypeName {
+            get {
+                return View.EntityTypeName;
+            }
+            set {
+                View.EntityTypeName = value;
+            }
+        }
+    }
+}